CADILLAC: August 2020

Monday, August 31, 2020

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 374

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 374

DTC B1065 01

- Audio Output 5 Circuit Short to Battery (Center IP)

DTC B1065 02

- Audio Output 5 Circuit Short to Ground (Center IP)

DTC B1065 04

- Audio Output 5 Circuit Open (Center IP)

DTC B1075 01

- Audio Output 6 Circuit Short to Battery (Subwoofer)

DTC B1075 02

- Audio Output 6 Circuit Short to Ground (Subwoofer)

DTC B1075 04

- Audio Output 6 Circuit Open (Subwoofer)

DTC B1085 01

- Audio Output 7 Circuit Short to Battery (LR D-Pillar)

DTC B1085 02

- Audio Output 7 Circuit Short to Ground (LR D-Pillar)

DTC B1085 04

- Audio Output 7 Circuit Open (LR D-Pillar)

DTC B1095 01

- Audio Output 8 Circuit Short to Battery (RR D-Pillar)

DTC B1095 02

- Audio Output 8 Circuit Short to Ground (RR D-Pillar)

DTC B1095 04

- Audio Output 8 Circuit Open (RR D-Pillar)

Diagnostic Fault Information

Circuit/System Description

Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier have a DC bias voltage that is one half of the battery voltage.

When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is

produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone

to move and produce sound. This voltage will vary depending on what type of audio is being listened to, talk or music, and type of music, as well as

the volume setting of the system. Low volume and talk settings will measure around 1V AC and less, where constant music may measure 3V AC

and slightly higher.

Conditions for Running the DTC

The radio is ON.

Conditions for Setting the DTC

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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 373

4. If all circuits test normal, reconnect all harness connectors at the amplifier.

5. Radio ON, disconnect the appropriate speaker.

6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.

瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.

瀚慖f greater then the specified range test the circuit for a short to voltage. If the circuit tests normal, replace the amplifier.

7. If the circuit tests normal, replace the appropriate speaker.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Speaker Replacement Reference (See: Accessories and Optional Equipment/Testing and Inspection/Symptom Related Diagnostic

Procedures/Cellular, Entertainment, and Navigation/Speaker Replacement Reference)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for Amplifier and Radio replacement, setup, and

programming

B1045

DTC B1025-B1095

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provide an overview of each diagnostic category.

DTC Descriptors

DTC B1025 01

- Audio Output 1 Left Front Circuit Short to Battery

DTC B1025 02

- Audio Output 1 Left Front Circuit Short to Ground

DTC B1025 04

- Audio Output 1 Left Front Circuit Open

DTC B1035 01

- Audio Output 2 Right Front Circuit Short to Battery

DTC B1035 02

- Audio Output 2 Right Front Circuit Short to Ground

DTC B1035 04

- Audio Output 2 Right Front Circuit Open

DTC B1045 01

- Audio Output 3 Left Rear Circuit Short to Battery

DTC B1045 02

- Audio Output 3 Left Rear Circuit Short to Ground

DTC B1045 04

- Audio Output 3 Left Rear Circuit Open

DTC B1055 01

- Audio Output 4 Right Rear Circuit Short to Battery

DTC B1055 02

- Audio Output 4 Right Rear Circuit Short to Ground

DTC B1055 04

- Audio Output 4 Right Rear Circuit Open

2010 Cadillac Truck SRX AWD V6-3.0L Page 304

瀚慖f the E4G headlamp-left low beam and the E4H headlamp-right low beam do not activate, test the control circuit for a short to ground or

an open/high resistance.

6. Connect a test lamp between the B+ circuit terminal 86 and the control circuit terminal 85.

7. Ignition ON, command the Low Beam Lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between

the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K9 BCM.

8. If all circuits test normal, test or replace the KR49 headlamp low beam relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the KR49 headlamp low beam relay.

2. Test for 60-180 ohm between terminals 85 and 86.

瀚慖f not within the specified range, replace the KR49 headlamp low beam relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the KR49 headlamp low beam relay.

4. Install a 15A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for

less than 2 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the KR49 headlamp low beam relay.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming

B260A

DTC B260A

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B260A 00

- Backlight and Display Dimming Request Circuit Malfunction

Diagnostic Fault Information

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1538

* A current DTC P0633 will be cleared upon a successful engine start after exit of learn mode.

* A history DTC will be cleared after 100 malfunction-free ignition cycles or when a scan tool is used to clear DTCs.

Diagnostic Aids

The "key" referenced in the DTC descriptor does not refer to the vehicle key. In this case, "key" is referring to the challenge response.

Reference Information

Schematic Reference

Immobilizer Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical Diagrams/Immobilizer

Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Immobilizer Description and Operation (without Y41) (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Description and

Operation/Immobilizer Description and Operation (Without Y41))Immobilizer Description and Operation (with Y41) (See: Accessories and

Optional Equipment/Antitheft and Alarm Systems/Description and Operation/Immobilizer Description and Operation (With Y41))

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Important: Because of normal system communications between the RCDLR and ECM, any theft deterrent B-codes must be diagnosed

prior to the diagnosis of P-codes.

Perform the 10-Minute Immobilizer Relearn procedure. Refer to Immobilizer System Component Programming (without RPO Y41) (See:

Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/Immobilizer System

Component Programming (without RPO Y41))Immobilizer System Component Programming (with RPO Y41) (See: Accessories and Optional

Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/Immobilizer System Component Programming (with

RPO Y41)). The ECM should successfully complete the password learn and the vehicle should start.

If the ECM does not complete the learn or vehicle starting remains disabled, replace the ECM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

Without Y41

DTC P0633 (without Y41)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P0633

- Theft Deterrent Key Not Programmed

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 372

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 372

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

瀚慖f less than the specified value, test both circuits of the affected speaker for a short to ground.

4. If all circuits test normal, reconnect all harness connectors at the amplifier.

5. Ignition ON, radio ON, disconnect the appropriate speaker.

6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.

瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.

瀚慖f greater then the specified range test the circuit for a short to voltage. If the circuit tests normal, replace the amplifier.

7. If the circuit tests normal, replace the appropriate speaker.

DTC Set by Audio Amplifier UQA with Y91 or UQS

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 5 X2

* Right front speaker output (+) - terminal 7 X2

* Right front speaker output (-) - terminal 6 X2

* Left rear speaker output (+) - terminal 15 X2

* Left rear speaker output (-) - terminal 14 X2

* Right rear speaker output (+) - terminal 16 X2

* Right rear speaker output (-) - terminal 8 X2

* Front center speaker output (+) - terminal 13 X2

* Front center speaker output (-) - terminal 12 X2

* Right rear midrange speaker output (+) - terminal 3 X2

* Right rear midrange speaker output (-) - terminal 2 X2

* Left rear midrange speaker output (+) - terminal 11 X2

* Left rear midrange speaker output (-) - terminal 10 X2

* Left or rear subwoofer speaker output (+) - terminal 1 X1

* Left or rear subwoofer speaker output (-) - terminal 2 X1

* Right subwoofer speaker output (+) - terminal 7 X1

* Right subwoofer speaker output (-) - terminal 3 X1

瀚慖f greater than the specified range, test both circuits of the affected speaker for a short to voltage.

3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 5 X2

* Right front speaker output (+) - terminal 7 X2

* Right front speaker output (-) - terminal 6 X2

* Left rear speaker output (+) - terminal 15 X2

* Left rear speaker output (-) - terminal 14 X2

* Right rear speaker output (+) - terminal 16 X2

* Right rear speaker output (-) - terminal 8 X2

* Front center speaker output (+) - terminal 13 X2

* Front center speaker output (-) - terminal 12 X2

* Right rear midrange speaker output (+) - terminal 3 X2

* Right rear midrange speaker output (-) - terminal 2 X2

* Left rear midrange speaker output (+) - terminal 11 X2

* Left rear midrange speaker output (-) - terminal 10 X2

* Left or rear subwoofer speaker output (+) - terminal 1 X1

* Left or rear subwoofer speaker output (-) - terminal 2 X1

* Right subwoofer speaker output (+) - terminal 7 X1

* Right subwoofer speaker output (-) - terminal 3 X1

瀚慖f less than the specified value, test both circuits of the affected speaker for a short to ground.

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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 371

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

* Right front low level audio signal (-) - terminal 4 X3

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

3. Ignition OFF, reconnect the X3 harness connector at the amplifier.

4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.

5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 1

* Left rear low level audio signal (-) - terminal 2

* Right rear low level audio signal (+) - terminal 3

* Right rear low level audio signal (-) - terminal 4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X2 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 15

* Left rear low level audio signal (-) - terminal 14

* Right rear low level audio signal (+) - terminal 16

* Right rear low level audio signal (-) - terminal 8

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set by Audio Amplifier UQA

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

瀚慖f greater than the specified range, test both circuits of the affected speaker for a short to voltage.

3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 370

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

3. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with U42

1. Ignition OFF, disconnect the X3 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 15

* Left front low level audio signal (-) - terminal 7

* Right front low level audio signal (+) - terminal 14

* Right front low level audio signal (-) - terminal 6

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

3. Ignition OFF, reconnect the X3 harness connector at the amplifier.

4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.

5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 1

* Left rear low level audio signal (-) - terminal 2

* Right rear low level audio signal (+) - terminal 3

* Right rear low level audio signal (-) - terminal 4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X3 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 13

* Left rear low level audio signal (-) - terminal 5

* Right rear low level audio signal (+) - terminal 12

* Right rear low level audio signal (-) - terminal 4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connectors at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

* Right front low level audio signal (-) - terminal 4 X3

* Left rear low level audio signal (+) - terminal 11 X4

* Left rear low level audio signal (-) - terminal 12 X4

* Right rear low level audio signal (+) - terminal 3 X4

* Right rear low level audio signal (-) - terminal 4 X4

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

3. If all circuits test normal, replace the amplifier.

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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 37

P0340 - P0357

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1880

DTC Descriptors

DTC P2147

- Cylinder 1 Injector High Control Circuit Low Voltage

DTC P2148

- Cylinder 1 Injector High Control Circuit High Voltage

DTC P2150

- Cylinder 2 Injector High Control Circuit Low Voltage

DTC P2151

- Cylinder 2 Injector High Control Circuit High Voltage

DTC P2153

- Cylinder 3 Injector High Control Circuit Low Voltage

DTC P2154

- Cylinder 3 Injector High Control Circuit High Voltage

DTC P2156

- Cylinder 4 Injector High Control Circuit Low Voltage

DTC P2157

- Cylinder 4 Injector High Control Circuit High Voltage

DTC P216B

- Cylinder 5 Injector High Control Circuit Low Voltage

DTC P216C

- Cylinder 5 Injector High Control Circuit High Voltage

DTC P216E

- Cylinder 6 Injector High Control Circuit Low Voltage

DTC P216F

- Cylinder 6 Injector High Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 369

Speakers located in the front A-pillar are connected to the same channel as the speaker in the door. A DTC will only set after the amplifier only on

up-level radios.

Reference Information

Schematic Reference

Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System

Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Radio ON, adjust the fade and balance controls on the radio to test all four channels individually. Each of the four channels should produce clear

and even sound.

Circuit/System Testing

Important: This DTC can be set by either the radio or the amplifier. If the DTC was set by the radio, diagnose the appropriate audio

output circuits to the speakers or the low level inputs to the amplifier (if equipped). If the DTC was set by the amplifier, diagnose audio

output signals to the speakers from the amplifier. If equipped with rear seat audio (RSA) (U42), the RSA must be turned off to perform

proper speaker testing.

Without Amplifier

1. Ignition OFF, disconnect the harness connector at the appropriate speaker.

2. Radio ON, test for 5.0-7.5 volts between the signal circuit terminal A and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

3. Test for 5.0-7.5 volts between the signal circuit terminal B and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

4. If all circuits test normal, replace the speaker.

DTC Set By The Radio UQA

1. Ignition OFF, disconnect the X3 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 15

* Left front low level audio signal (-) - terminal 7

* Right front low level audio signal (+) - terminal 14

* Right front low level audio signal (-) - terminal 6

* Left rear low level audio signal (+) - terminal 13

* Left rear low level audio signal (-) - terminal 5

* Right rear low level audio signal (+) - terminal 12

* Right rear low level audio signal (-) - terminal 4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

2010 Cadillac Truck SRX AWD V6-3.0L Page 1277

瀚慖f the circuits test normal, replace the K20 ECM.

Note: Testing for the following steps is performed on the fuel injector side of the multi-way harness connector. It may be necessary to

remove the intake manifold to isolate the condition.

4. Ignition OFF, measure the resistance between the appropriate high voltage supply circuit and ground. The DMM should display OL ohm.

瀚慖f less than the specified range, test the high voltage supply circuit and the high voltage control circuit for a short to ground. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

5. Test for 2-3 ohm between the appropriate high voltage supply circuit and high voltage control circuit.

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P0206

DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277

(LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 368

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 368

Circuit/System Description

Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier have a DC bias voltage that is one half of the battery voltage.

When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is

produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone

to move and produce sound. This voltage will vary depending on what type of audio is being listened to, talk or music, and type of music, as well as

the volume setting of the system. Low volume and talk settings will measure around 1V AC and less, where constant music may measure 3V AC

and slightly higher.

Conditions for Running the DTC

The radio is ON.

Conditions for Setting the DTC

Set by Radio

The radio sets a current status for this DTC when a short to ground, short to voltage or an open is detected on any of the speaker channel outputs

from the radio.

Set by Bose Amplifier

The DTC will not set during normal amplifier operation. The vehicle must have the ignition OFF for several hours and the fault must be present

during amplifier power-up.

DTC B1025 01, B1035 01, B1045 01, B1055 01, B1065 01, B1075 01, B1085 01, B1095 01

A short to voltage is detected on the specified (+) or (-) signal circuit

DTC B1025 02, B1035 02, B1045 02, B1055 02, B1065 02, B1075 02, B1085 02, B1095 02

A short to ground is detected on the specified (+) or (-) signal circuit

DTC B1025 04, B1035 04, B1045 04, B1055 04, B1065 04, B1075 04, B1085 04, B1095 04

An open is detected on the specified (+) or (-) signal circuit

Action Taken When the DTC Sets

No sound is present from one or more of the speakers.

Conditions for Clearing the DTC

Set by Radio

The fault condition becomes history if not present for 0.25 seconds.

Set by Bose Amplifier

The fault condition becomes history after the vehicle ignition has been OFF for several hours and then the ignition turns ON.

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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 367

DTC B1045 02

- Audio Output 3 Left Rear Circuit Short to Ground

DTC B1045 04

- Audio Output 3 Left Rear Circuit Open

DTC B1055 01

- Audio Output 4 Right Rear Circuit Short to Battery

DTC B1055 02

- Audio Output 4 Right Rear Circuit Short to Ground

DTC B1055 04

- Audio Output 4 Right Rear Circuit Open

DTC B1065 01

- Audio Output 5 Circuit Short to Battery (Center IP)

DTC B1065 02

- Audio Output 5 Circuit Short to Ground (Center IP)

DTC B1065 04

- Audio Output 5 Circuit Open (Center IP)

DTC B1075 01

- Audio Output 6 Circuit Short to Battery (Subwoofer)

DTC B1075 02

- Audio Output 6 Circuit Short to Ground (Subwoofer)

DTC B1075 04

- Audio Output 6 Circuit Open (Subwoofer)

DTC B1085 01

- Audio Output 7 Circuit Short to Battery (LR D-Pillar)

DTC B1085 02

- Audio Output 7 Circuit Short to Ground (LR D-Pillar)

DTC B1085 04

- Audio Output 7 Circuit Open (LR D-Pillar)

DTC B1095 01

- Audio Output 8 Circuit Short to Battery (RR D-Pillar)

DTC B1095 02

- Audio Output 8 Circuit Short to Ground (RR D-Pillar)

DTC B1095 04

- Audio Output 8 Circuit Open (RR D-Pillar)

Diagnostic Fault Information

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* Left rear speaker output (-) - terminal 14 X2

* Right rear speaker output (+) - terminal 16 X2

* Right rear speaker output (-) - terminal 8 X2

* Front center speaker output (+) - terminal 13 X2

* Front center speaker output (-) - terminal 12 X2

* Right rear midrange speaker output (+) - terminal 3 X2

* Right rear midrange speaker output (-) - terminal 2 X2

* Left rear midrange speaker output (+) - terminal 11 X2

* Left rear midrange speaker output (-) - terminal 10 X2

* Left or rear subwoofer speaker output (+) - terminal 1 X1

* Left or rear subwoofer speaker output (-) - terminal 2 X1

* Right subwoofer speaker output (+) - terminal 7 X1

* Right subwoofer speaker output (-) - terminal 3 X1

瀚慖f less than the specified value, test both circuits of the affected speaker for a short to ground.

4. If all circuits test normal, reconnect all harness connectors at the amplifier.

5. Radio ON, disconnect the appropriate speaker.

6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.

瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.

瀚慖f greater then the specified range test the circuit for a short to voltage. If the circuit tests normal, replace the amplifier.

7. If the circuit tests normal, replace the appropriate speaker.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Speaker Replacement Reference (See: Accessories and Optional Equipment/Testing and Inspection/Symptom Related Diagnostic

Procedures/Cellular, Entertainment, and Navigation/Speaker Replacement Reference)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for Amplifier and Radio replacement, setup, and

programming

B1035

DTC B1025-B1095

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provide an overview of each diagnostic category.

DTC Descriptors

DTC B1025 01

- Audio Output 1 Left Front Circuit Short to Battery

DTC B1025 02

- Audio Output 1 Left Front Circuit Short to Ground

DTC B1025 04

- Audio Output 1 Left Front Circuit Open

DTC B1035 01

- Audio Output 2 Right Front Circuit Short to Battery

DTC B1035 02

- Audio Output 2 Right Front Circuit Short to Ground

DTC B1035 04

- Audio Output 2 Right Front Circuit Open

DTC B1045 01

- Audio Output 3 Left Rear Circuit Short to Battery

2010 Cadillac CTS Sedan AWD V6-3.0L Technical Service Bulletin # 09-08-44-006D Date: 100422

Navigation Radio - Display Squeaks/Makes Noise

TECHNICAL

Bulletin No.: 09-08-44-006D

Date: April 22, 2010

Subject: Navigation Information Display Squeaks or Makes Noise (Lubricate Display Mechanism or Trim Excess Material)

2010 Cadillac CTS Sedan AWD V6-3.0L Page 233

Models:

2008-2009 Cadillac CTS, CTS-V

2010 Cadillac CTS, CTS-V, CTS Sport Wagon

Built Prior to VIN Breakpoint A0106362

All Equipped with Navigation Radio (RPOs UAV, U2Y, U2X)

Supercede:

This bulletin is being revised to add the 2010 model year and associated repair information. Please discard Corporate Bulletin Number

09-08-44-006C (Section 08 - Body and Accessories).

Condition

Some customers may comment that the navigation information display squeaks or makes noise when it is raised or lowered.

Cause

2008-2009 Cadillac CTS, CTS-V

This condition may be caused by the gears and guides on the navigation display mechanism.

2010 Cadillac CTS, CTS-V, CTS Sport Wagon

This condition may be caused by excess instrument panel material rubbing on the navigation information display housing in the upper right corner.

Correction

2008-2009 Cadillac CTS, CTS-V

Important

DO NOT replace the navigation information display for this concern. Perform the following repair before diagnosing and replacing the

navigation information display.

1. Remove the navigation information display opening cover. Refer to Navigation Information Display Opening Cover Replacement in SI.

2. Remove the navigation information display. Refer to Radio, Video, Audio Disc Player, and Navigation Information Display Replacement in

SI.

Caution

2010 Cadillac CTS Sedan AWD V6-3.0L Page 234

DO NOT drag the display on the work table. Dragging the display on the work table may cause the rubber pad (1) to come off.

3. Move the display to a suitable work table.

4. Using care, manually move the display from the lower position (1) to the upper most position (2).

5. Use the recommended brush shown above to apply lubricant in the following step. For best application of the lubricant, use a brush that has

bristles 3-5 mm (0.125-0.2 in) wide and 10 mm (0.394 in) long.

6. Using the brush shown in the previous step, apply lubricant to the right side path of the bush guide from bottom to top. The lubricant should

be applied in two applications as shown.

7. Use the guide shown for the minimum (1), standard (2) and maximum (3) amount of lubricant to use. Repeat Steps 6 and 7 on the left side

bush guide.

2010 Cadillac CTS Sedan AWD V6-3.0L Page 235

8. After you have applied the lubricant with the display in the upper most position (2), carefully move the display manually down (1), then up

(2), and finally down again (1).

9. Install the display back into the vehicle. Refer to Radio, Video, Audio Disc Player, and Navigation Information Display Replacement in SI.

10. Install the display opening cover. Refer to Navigation Information Display Opening Cover Replacement in SI.

2010 Cadillac CTS, CTS-V, CTS Sport Wagon

Important

DO NOT replace the navigation information display for this concern. Perform the following repair before diagnosing and replacing the

navigation information display.

1. Remove the front floor console applique. Refer to Front Floor Console Applique Replacement in SI.

2. Remove the front floor console transmission shift opening trim plate. Refer to Front Floor Console Transmission Shift Opening Trim Plate

Replacement in SI.

3. Remove the center instrument panel trim plate applique. Refer to Instrument Panel Trim Plate Applique Replacement - Center in SI.

2010 Cadillac CTS Sedan AWD V6-3.0L Page 236

4. Remove the right side instrument panel trim plate applique. Refer to Instrument Panel Trim Plate Applique Replacement - Right Side in SI.

5. Remove the radio control assembly. Refer to Radio Control Assembly Replacement (with Navigation Display) in SI. Do not disconnect any

connectors.

6. Raise the navigation information display by pressing the NAV button on the radio control.

7. Using a sharp X-Acto(R) knife or utility knife, trim the excess instrument panel material on the right side of the navigation display in the area

shown (1). Only trim off the excess flap or bulged material.

Important

Avoid nicking or scratching the navigation display when trimming the excess material from the instrument panel.

8. When correctly trimmed, the instrument panel will appear as shown above (1). The resulting trimmed area should only extend about halfway

up the small section of the instrument panel as shown between the two arrows in the picture above.

9. Install the radio control assembly. Refer to Radio Control Assembly Replacement (with Navigation Display) in SI. Do not disconnect any

connectors.

10. Install the right side instrument panel trim plate applique. Refer to Instrument Panel Trim Plate Applique Replacement - Right Side in SI.

11. Install the center instrument panel trim plate applique. Refer to Instrument Panel Trim Plate Applique Replacement - Center in SI.

12. Install the front floor console transmission shift opening trim plate. Refer to Front Floor Console Transmission Shift Opening Trim Plate

Replacement in SI.

13. Install the front floor console applique. Refer to Front Floor Console Applique Replacement in SI.

Parts Information

Warranty Information

Use the correct labor operation for the appropriate repair.

For vehicles repaired under warranty, use the table above.

2010 Cadillac CTS Sedan AWD V6-3.0L Page 237

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* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

瀚慖f greater than the specified range, test both circuits of the affected speaker for a short to voltage.

3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

瀚慖f less than the specified value, test both circuits of the affected speaker for a short to ground.

4. If all circuits test normal, reconnect all harness connectors at the amplifier.

5. Ignition ON, radio ON, disconnect the appropriate speaker.

6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.

瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.

瀚慖f greater then the specified range test the circuit for a short to voltage. If the circuit tests normal, replace the amplifier.

7. If the circuit tests normal, replace the appropriate speaker.

DTC Set by Audio Amplifier UQA with Y91 or UQS

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 5 X2

* Right front speaker output (+) - terminal 7 X2

* Right front speaker output (-) - terminal 6 X2

* Left rear speaker output (+) - terminal 15 X2

* Left rear speaker output (-) - terminal 14 X2

* Right rear speaker output (+) - terminal 16 X2

* Right rear speaker output (-) - terminal 8 X2

* Front center speaker output (+) - terminal 13 X2

* Front center speaker output (-) - terminal 12 X2

* Right rear midrange speaker output (+) - terminal 3 X2

* Right rear midrange speaker output (-) - terminal 2 X2

* Left rear midrange speaker output (+) - terminal 11 X2

* Left rear midrange speaker output (-) - terminal 10 X2

* Left or rear subwoofer speaker output (+) - terminal 1 X1

* Left or rear subwoofer speaker output (-) - terminal 2 X1

* Right subwoofer speaker output (+) - terminal 7 X1

* Right subwoofer speaker output (-) - terminal 3 X1

瀚慖f greater than the specified range, test both circuits of the affected speaker for a short to voltage.

3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 5 X2

* Right front speaker output (+) - terminal 7 X2

* Right front speaker output (-) - terminal 6 X2

* Left rear speaker output (+) - terminal 15 X2

2010 Cadillac Truck SRX AWD V6-3.0L Page 197

* Impact sensor wiring harness connector

* SDM wiring harness connector

Note: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an

audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly. Replace

any CPA that is damaged or missing.

If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the

high resistance condition due to terminal fretting corrosion.

1. Verify that DTC B0083-B0088 symptom byte 39 or 71 is not set as current.

瀚慖f symptom byte 39 or 71 is set as current, replace the appropriate B59 front impact sensor or B63 side impact sensor.

2. Verify that the SDM calibrations match the VIN data, software part number, and calibration part number.

瀚慖f not the correct data or part number, program the SDM.

3. Verify the correct impact sensors have the correct part numbers, matching the label part numbers with the parts book.

瀚慖f the part numbers do not match, replace the incorrect B59 front impact sensor or B63 side impact sensor

4. Verify that DTC B0083-B0088 symptom byte 01, 02, 04, 05, or 0C is not set as current.

瀚慖f symptom byte 01, 02, 04, 05, or 0C is set as current, refer to Circuit/System Testing.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate B59 front impact sensor or B63 side impact sensor.

2. Ignition OFF, disconnect the scan tool, wait 120 seconds, test for less than 10 ohm between the low reference circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K36

SDM.

3. Test for greater than 50k ohm between the signal circuit terminal 1 and ground.

瀚慖f less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K36 SDM.

4. Disconnect the harness connector at the SDM.

5. Test for less than 1 ohm between the impact sensor signal circuit terminal 1 and the SDM terminal listed below.

* B59 Left front impact sensor terminal 23 X2

* B59 Right front impact sensor terminal 26 X2

* B63 Left front side impact sensor terminal 19 X2

* B63 Right front side impact sensor terminal 22 X2

* B63 Left rear side impact sensor terminal 27 X2

* B63 Right rear side impact sensor terminal 30 X2

瀚慖f greater than the specified range, test the circuit for an open/high resistance.

6. If all circuits test normal, replace the B59 front impact sensor or B63 side impact sensor. The DTC should not be set as current.

瀚慖f the DTC resets as current, replace the K36 SDM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Inflatable Restraint Side Impact Sensor Replacement (See: Restraints and Safety Systems/Air Bag Systems/Impact Sensor/Service and

Repair/Inflatable Restraint Side Impact Sensor Replacement)

* Front End Inflatable Restraint Discriminating Sensor Replacement (See: Restraints and Safety Systems/Air Bag Systems/Impact

Sensor/Service and Repair/Front End Inflatable Restraint Discriminating Sensor Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for SDM replacement, setup, and programming

B096A

DTC B096A

Diagnostic Instructions

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* Right front low level audio signal (-) - terminal 4 X3

* Left rear low level audio signal (+) - terminal 11 X4

* Left rear low level audio signal (-) - terminal 12 X4

* Right rear low level audio signal (+) - terminal 3 X4

* Right rear low level audio signal (-) - terminal 4 X4

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

3. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

* Right front low level audio signal (-) - terminal 4 X3

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

3. Ignition OFF, reconnect the X3 harness connector at the amplifier.

4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.

5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 1

* Left rear low level audio signal (-) - terminal 2

* Right rear low level audio signal (+) - terminal 3

* Right rear low level audio signal (-) - terminal 4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X2 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 15

* Left rear low level audio signal (-) - terminal 14

* Right rear low level audio signal (+) - terminal 16

* Right rear low level audio signal (-) - terminal 8

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set by Audio Amplifier UQA

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 363

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 363

DTC Set By The Radio UQA

1. Ignition OFF, disconnect the X3 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 15

* Left front low level audio signal (-) - terminal 7

* Right front low level audio signal (+) - terminal 14

* Right front low level audio signal (-) - terminal 6

* Left rear low level audio signal (+) - terminal 13

* Left rear low level audio signal (-) - terminal 5

* Right rear low level audio signal (+) - terminal 12

* Right rear low level audio signal (-) - terminal 4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

3. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with U42

1. Ignition OFF, disconnect the X3 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 15

* Left front low level audio signal (-) - terminal 7

* Right front low level audio signal (+) - terminal 14

* Right front low level audio signal (-) - terminal 6

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

3. Ignition OFF, reconnect the X3 harness connector at the amplifier.

4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.

5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 1

* Left rear low level audio signal (-) - terminal 2

* Right rear low level audio signal (+) - terminal 3

* Right rear low level audio signal (-) - terminal 4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X3 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 13

* Left rear low level audio signal (-) - terminal 5

* Right rear low level audio signal (+) - terminal 12

* Right rear low level audio signal (-) - terminal 4

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connectors at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 362

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 362

Action Taken When the DTC Sets

No sound is present from one or more of the speakers.

Conditions for Clearing the DTC

Set by Radio

The fault condition becomes history if not present for 0.25 seconds.

Set by Bose Amplifier

The fault condition becomes history after the vehicle ignition has been OFF for several hours and then the ignition turns ON.

Diagnostic Aids

Speakers located in the front A-pillar are connected to the same channel as the speaker in the door. A DTC will only set after the amplifier only on

up-level radios.

Reference Information

Schematic Reference

Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System

Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Radio ON, adjust the fade and balance controls on the radio to test all four channels individually. Each of the four channels should produce clear

and even sound.

Circuit/System Testing

Important: This DTC can be set by either the radio or the amplifier. If the DTC was set by the radio, diagnose the appropriate audio

output circuits to the speakers or the low level inputs to the amplifier (if equipped). If the DTC was set by the amplifier, diagnose audio

output signals to the speakers from the amplifier. If equipped with rear seat audio (RSA) (U42), the RSA must be turned off to perform

proper speaker testing.

Without Amplifier

1. Ignition OFF, disconnect the harness connector at the appropriate speaker.

2. Radio ON, test for 5.0-7.5 volts between the signal circuit terminal A and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

3. Test for 5.0-7.5 volts between the signal circuit terminal B and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the radio.

4. If all circuits test normal, replace the speaker.

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1852

Conditions for Clearing the DTC

DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277,

P2146, P2149, P2152, P2155, P216A, and P216D are Type B DTCs.

Diagnostic Aids

* The high voltage supply circuits of injectors 2 and 5, and injectors 3 and 6, are paired together with a dual high side driver in the controller.

A short to ground, or a short to voltage, on one of the paired circuits will set a DTC for the companion injector. The ECM will also disable

the high side driver for the affected injectors.

* The high voltage supply circuits of injectors 1 and 4 are not paired together in the controller.

* Performing the fuel injector coil test may help isolate an intermittent condition. Refer to Fuel Injector Solenoid Coil Test (w/LLT) (See:

Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector

Solenoid Coil Test)Fuel Injector Solenoid Coil Test (w/LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Injector/Testing and Inspection).

* If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool Injector

Control Circuit Test Status parameters. An Injector Control Circuit Test Status parameter will change from OK or Not Run to Fault if there is

a condition with the circuit or a connection.

Reference Information

Schematic Reference

Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Fuel System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Fuel System Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Ignition ON, observe the DTC information. DTC P062B should not set.

瀚慖f DTC P062B failed this ignition, refer to DTC P062B (w/LLT) (See: P Code Charts/P062B).

2. Observe the scan tool Current Misfire Counter parameters. The Current Misfire Counters should not increment.

3. Engine operating, observe the appropriate scan tool Injector Control Circuit Test Status parameters. Verify the Injector Control Circuit Test

Status parameters display OK or Not Run.

4. Engine operating, observe the DTC information with a scan tool. DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264,

P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D should not set.

5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition ON, clear the scan tool DTC information.

2. Ignition OFF, disconnect the appropriate multi-way harness connector X116 or X117, at the rear of the intake manifold.

Note: Testing for steps 3 through 12 is performed on the ECM side of the multi-way harness connector.

3. Connect a test lamp between ground and the high voltage supply circuit terminal of the appropriate injector listed below.

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- Audio Output 7 Circuit Short to Ground (LR D-Pillar)

DTC B1085 04

- Audio Output 7 Circuit Open (LR D-Pillar)

DTC B1095 01

- Audio Output 8 Circuit Short to Battery (RR D-Pillar)

DTC B1095 02

- Audio Output 8 Circuit Short to Ground (RR D-Pillar)

DTC B1095 04

- Audio Output 8 Circuit Open (RR D-Pillar)

Diagnostic Fault Information

Circuit/System Description

Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier have a DC bias voltage that is one half of the battery voltage.

When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is

produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone

to move and produce sound. This voltage will vary depending on what type of audio is being listened to, talk or music, and type of music, as well as

the volume setting of the system. Low volume and talk settings will measure around 1V AC and less, where constant music may measure 3V AC

and slightly higher.

Conditions for Running the DTC

The radio is ON.

Conditions for Setting the DTC

Set by Radio

The radio sets a current status for this DTC when a short to ground, short to voltage or an open is detected on any of the speaker channel outputs

from the radio.

Set by Bose Amplifier

The DTC will not set during normal amplifier operation. The vehicle must have the ignition OFF for several hours and the fault must be present

during amplifier power-up.

DTC B1025 01, B1035 01, B1045 01, B1055 01, B1065 01, B1075 01, B1085 01, B1095 01

A short to voltage is detected on the specified (+) or (-) signal circuit

DTC B1025 02, B1035 02, B1045 02, B1055 02, B1065 02, B1075 02, B1085 02, B1095 02

A short to ground is detected on the specified (+) or (-) signal circuit

DTC B1025 04, B1035 04, B1045 04, B1055 04, B1065 04, B1075 04, B1085 04, B1095 04

An open is detected on the specified (+) or (-) signal circuit

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Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provide an overview of each diagnostic category.

DTC Descriptors

DTC B1025 01

- Audio Output 1 Left Front Circuit Short to Battery

DTC B1025 02

- Audio Output 1 Left Front Circuit Short to Ground

DTC B1025 04

- Audio Output 1 Left Front Circuit Open

DTC B1035 01

- Audio Output 2 Right Front Circuit Short to Battery

DTC B1035 02

- Audio Output 2 Right Front Circuit Short to Ground

DTC B1035 04

- Audio Output 2 Right Front Circuit Open

DTC B1045 01

- Audio Output 3 Left Rear Circuit Short to Battery

DTC B1045 02

- Audio Output 3 Left Rear Circuit Short to Ground

DTC B1045 04

- Audio Output 3 Left Rear Circuit Open

DTC B1055 01

- Audio Output 4 Right Rear Circuit Short to Battery

DTC B1055 02

- Audio Output 4 Right Rear Circuit Short to Ground

DTC B1055 04

- Audio Output 4 Right Rear Circuit Open

DTC B1065 01

- Audio Output 5 Circuit Short to Battery (Center IP)

DTC B1065 02

- Audio Output 5 Circuit Short to Ground (Center IP)

DTC B1065 04

- Audio Output 5 Circuit Open (Center IP)

DTC B1075 01

- Audio Output 6 Circuit Short to Battery (Subwoofer)

DTC B1075 02

- Audio Output 6 Circuit Short to Ground (Subwoofer)

DTC B1075 04

- Audio Output 6 Circuit Open (Subwoofer)

DTC B1085 01

- Audio Output 7 Circuit Short to Battery (LR D-Pillar)

2010 Cadillac Truck SRX AWD V6-3.0L Page 401

B0954 06, B0955 06, B0956 06, or B0957 06

The parking assist control module has detected the voltage at the sensor circuit is less than 0.5 V.

B0954 08, B0955 08, B0956 08, or B0957 08

The parking assist control module has received an invalid signal.

B0954 21, B0955 21, B0956 21, or B0957 21

The object sensor determines no change in the position of an object while the vehicle is in motion.

B0954 3A, B0955 3A, B0956 3A, or B0957 3A

The parking assist control module determines the wrong sensor type is installed.

Action Taken When the DTC Sets

* The parking assist is disabled.

* The driver information center displays SERVICE PARK ASSIST.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical

Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Object Detection Description and Operation (UVC) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist

Systems/Description and Operation/Object Detection (UVC))Object Detection Description and Operation (UD5) (See: Accessories and Optional

Equipment/Collision Avoidance and Parking Assist Systems/Description and Operation/Object Detection Description and Operation (UD5))

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Verify that DTC B1405 is not present.

瀚慖f DTC is present, refer to DTC B1405 (See: B Code Charts/B1405/Object Detection).

2. Verify that DTC B0954 01, B0955 01, B0956 01 or B0957 01 is not present.

瀚慖f DTC is present, check the appropriate sensor for contamination with mud, ice or snow. If no contamination is diagnosed, refer to

Circuit/System Testing.

3. Verify that DTC B0954 21, B0955 21, B0956 21 or B0957 21 is not present.

瀚慖f DTC is present, check the respective sensor for contamination by mud, ice or snow. If no contamination is diagnosed, replace the

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P0327 - P0336

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* Radio ON.

* Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

The audio amplifier detects an over-heat condition greater than 95掳C (203掳F) of the internal amplifier circuitry.

Action Taken When the DTC Sets

The audio amplifier will shut down and all speakers will be inoperative.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.

* A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Diagnostic Aids

Extended use or extremely high volume especially in warm weather conditions may cause this DTC to set. Under these conditions it may be normal

for this DTC to set to prevent permanent damage to the audio amplifier circuitry.

Reference Information

Schematic Reference

Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System

Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Radio/Audio System Description and Operation (See: Accessories and Optional Equipment/Description and Operation/Radio/Audio System

Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Note: Allow the entertainment system to cool if the ambient temperature inside the vehicle is in excess before proceeding with this diagnostic

procedure.

1. Ignition ON, with a scan tool clear all DTCs.

2. Radio ON, operate the system within the Condition for Running the DTC.

瀚慖f the DTC resets, replace the audio amplifier.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for audio amplifier replacement, setup, and programming

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* Air Delivery Description and Operation (See: Heating and Air Conditioning/Description and Operation/HVAC - Manual/Air Delivery

Description and Operation)Air Delivery Description and Operation

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

1. Ignition ON, disconnect the harness connector at the auxiliary HVAC control module, test for 4.8-5.2 volts between the 5-volt reference

circuit terminal 3 and ground.

瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the HVAC Control Module.

瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the HVAC

Control Module.

2. Reprogram the HVAC control module that set DTC B1023. The module should successfully reprogram.

瀚慖f the module will not reprogram, replace the HVAC control module that set the DTC.

3. With a scan tool, clear the DTC.

4. Ignition OFF.

5. Wait 60 seconds, then recheck for DTCs. DTC B1023 should not set.

瀚慖f DTC B1023 sets, replace the module.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning)Control Module References for control module

replacement, setup, and programming

B1024

DTC B1024

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B1024 11

- Circuit Board Temperature Sensor Above Maximum Threshold

Circuit/System Description

The audio amplifier monitors the internal circuitry for excessive temperature. When the amplifier senses an internal circuitry temperature greater

than 95掳C (203掳F), the amplifier will set DTC B1024 11 and shut down until the internal circuitry cools below 90掳C (194掳F).

Conditions for Running the DTC

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1599

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0685

- Engine Controls Ignition Relay Control Circuit

DTC P0690

- Engine Controls Ignition Relay Feedback Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The engine controls ignition relay or powertrain relay is a normally open relay. The relay switch is held in the open position by spring tension.

Battery positive voltage is supplied directly to the relay coil and the switch contact at all times. The engine control module (ECM) supplies the

ground path to the relay coil control circuit via an internal integrated circuit called an output driver. When the ECM commands the powertrain relay

ON, ignition voltage is supplied to several fuses in the under-hood fuse block.

The ignition voltage that is supplied to the ECM provides power to the internal ECM circuits associated with the throttle actuator control (TAC)

operation. The ECM also monitors the voltage level on the ignition voltage circuit to confirm that the powertrain relay contacts have closed.

Conditions for Running the DTC

* The ignition is ON.

* The ignition voltage is between 11-18 V.

* The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

P0685

The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 2 s.

P0690

* The ECM detects the engine controls ignition relay feedback circuit is greater than 2 V when the relay is commanded OFF.

* The ECM detects the engine controls ignition relay feedback circuit is greater than 18 V when the relay is commanded ON.

* The condition is present for greater than 2 s.

Action Taken When the DTC Sets

DTCs P0685 and P0690 are Type B DTCs.

Conditions for Clearing the DTC

2010 Cadillac Truck SRX AWD V6-3.0L Page 1471

normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.

5. Engine running, observe the Ignition Coil 1-6 Control Circuit Low Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for open or short to ground.

6. Engine running, observe the Ignition Coil 1-6 Control Circuit Open Test Status on the scan tool. Test Status should be Ok or Not Run.

瀚慖f test status is Malfunction test for open circuit.

7. Engine running, observe the Ignition Coil 1 6 Control Circuit High Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for short to voltage.

8. If all circuits test normal, test or replace the T8 ignition coil.

Repair Instructions

* T8 Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 1)

* T8 Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

Repair Verification

Note: An ignition control circuit fault condition will result in an engine misfire, and under certain driving conditions could possibly overheat the

3-way catalytic converter.

1. Install any components or connectors that have been removed or replaced during diagnosis.

2. Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.

3. Clear the DTCs.

4. Turn the ignition OFF for 60 s.

5. If the repair is related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in

order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle

(See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic

procedure.

6. To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTC P0420 or P0430.

P0365

DTC P0340, P0345, P0365, or P0390 (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0340

- Intake Camshaft Position Sensor Circuit Bank 1

DTC P0345

- Intake Camshaft Position Sensor Circuit Bank 2

DTC P0365

- Exhaust Camshaft Position Sensor Circuit Bank 1

DTC P0390

- Exhaust Camshaft Position Sensor Circuit Bank 2

Diagnostic Fault Information

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瀚慖f the module will not reprogram, replace the HVAC control module that set the DTC.

2. With a scan tool, clear the DTC.

3. Ignition OFF.

4. Wait 60 seconds, then recheck for DTCs. DTC B1023 should not set.

瀚慖f DTC B1023 sets, replace the module.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning)for control module replacement, setup, and programming

HVAC - Manual

DTC B1023

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptor

DTC B1023 05

- Integral Switch Performance Short to Ground

DTC B1023 06

- Integral Switch Performance Short to Battery or Open

DTC B1023 61

- Integral Switch Performance Signal Invalid

Circuit/System Description

This DTC may be set by an open or shorted 5 volt reference circuit to the auxiliary HVAC control module or an internal fault inside the HVAC

control module for a stuck or shorted control button.

Conditions for Running the DTC

Battery voltage is between 9-16 volts and data link communications operate normally.

Conditions for Setting the DTC

The HVAC control module has internal fault inside the HVAC control module for a stuck or shorted control button or shorted 5 volt reference

circuit.

Conditions for Clearing the DTC

* A current DTC clears when the malfunction is no longer present.

* A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Reference Information

Schematic Reference

HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams/HVAC - Manual)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

* Air Temperature Description and Operation (See: Heating and Air Conditioning/Description and Operation/HVAC - Manual/Air

Temperature Description and Operation)Air Temperature Description and Operation