2010 Cadillac CTS Sedan AWD V6-3.6L Page 733

2010 Cadillac CTS Sedan AWD V6-3.6L Page 733

Circuit/System Verification

Ignition ON, command the damper actuator ON and OFF while jouncing the vehicle in the front and rear. Suspension should change stiffness when

commanded between the ON and OFF state.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate suspension damper.

2. Perform this setup step in the following order:

1. Connect a test lamp between the damper connector control circuit terminal A and control circuit terminal B.

2. Ignition ON, with a scan tool, clear all ESC module DTCs.

3. Command the damper 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 terminal A for a short to voltage. If the circuit tests normal, replace the ESC module.

瀚慖f the test lamp is always OFF, test the control circuits listed below. If all circuits test normal, replace the ESC module.

* Control circuit terminal A for a short to ground or open/high resistance.

* Control circuit terminal B for an open/high resistance or short to voltage.

4. If all circuits test normal, test or replace the suspension damper.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate suspension damper.

2. Test for 0.7-3.3ohm between the control circuit terminal A and the control circuit terminal B of the suspension damper.

瀚慖f not within the specified range, replace the suspension damper.

Repair Instructions

* Shock Absorber Replacement (See: Steering and Suspension/Suspension/Suspension Strut / Shock Absorber/Service and Repair/Rear

Suspension Shock Absorber)

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

Repair Verification

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. Use the scan tool Diagnostic Counter Reset output control function to bypass the 3 consecutive ignition cycle requirement for setting a DTC.

This will ensure that if a DTC was to be reset during the repair verification process, it will be displayed on the scan tool.

5. Turn OFF the ignition for 60 seconds.

6. Turn ON the ignition.

7. If the repair was 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 the and perform the appropriate diagnostic

procedure

C0580

DTC C0575, C0580, C0585, or C0590

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 C0575 01

- Left Front Actuator Circuit - Short To Battery

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2010 Cadillac Truck SRX AWD V6-3.0L Page 844

1. Connect a test lamp and ammeter in series between both Q37 shock absorber actuator harness connector control circuit terminals.

2. Ignition ON, with a scan tool, attempt to clear all K19 suspension control module DTC's (codes may not clear).

3. With a scan tool, command the Damper Actuator to Increase the amperage to approximately 400 mA and Decrease to 0 mA while comparing

the ammeter displayed values and scan tool Damper Actuator Command parameter displayed values. Verify the following:

* The test lamp is illuminated.

* The ammeter displayed values and scan tool Damper Actuator Command parameter displayed values change and are simultaneously

within 15 mA of each other.

瀚慖f the test lamp is not illuminated and/or the values are not within the specified range, test both control circuits for a short to voltage, short

to ground, or open/high resistance. If all circuits test normal, replace the K19 suspension control module.

4. If all circuits test normal, test or replace the Q37 shock absorber actuator.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the appropriate Q37 shock absorber actuator.

2. Test for 2-3 ohm between the Q37 shock absorber actuator control terminals.

瀚慖f not within the specified range, replace the Q37 shock absorber actuator.

Repair Instructions

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

* Strut, Strut Component, or Spring Replacement (See: Steering and Suspension/Suspension/Suspension Spring ( Coil / Leaf )/Service and

Repair/Front Suspension Coil Spring)

* Shock Absorber Replacement (See: Steering and Suspension/Suspension/Suspension Strut / Shock Absorber/Service and Repair/Rear

Suspension Shock Absorber)

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

and programming

C0590

DTC C0575, C0580, C0585, or C0590

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 C0575 02

- Left Front Damper Actuator Circuit Short to Ground

DTC C0575 04

- Left Front Damper Actuator Circuit Open

DTC C0575 0F

- Left Front Damper Actuator Circuit Signal Erratic

DTC C0580 02

- Right Front Damper Actuator Circuit Short to Ground

DTC C0580 04

- Right Front Damper Actuator Circuit Open

DTC C0580 0F

- Right Front Damper Actuator Circuit Signal Erratic

DTC C0585 02

- Left Rear Damper Actuator Circuit Short to Ground

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 537

2. Ignition OFF, test for less than 2.0 ohms between the low reference circuit terminal A 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 MSM.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal B 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 MSM.

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 MSM.

4. Verify the scan tool Telescope or Tilt Sensor parameter is less than 0.2 volt.

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

5. Install a 3A fused jumper wire between the signal circuit terminal C and the 5-volt reference circuit terminal B. Verify the scan tool

Telescope or Tilt Sensor parameter is greater than 4.8 volts.

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 MSM.

6. If all circuits test normal, test or replace the telescope or tilt actuator.

Repair Instructions

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

* Steering Column Replacement (See: Steering and Suspension/Steering/Steering Column/Service and Repair/Steering Column Replacement)

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

B2890

DTC B2890

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 B2890 4B

- Tilt and Telescope Motor Circuit Calibration Not Learned

Circuit Description

The memory seat module (MSM) learns tilt/telescope soft stops approximately 1.3 cm (0.5 in) from the mechanical ends of travel. The system uses

soft stops to prevent wear on the system by ensuring that the steering column movement stops before it reaches its mechanical end of travel in any

direction. The soft stops are initially programmed at the factory. The stop positions may be reprogrammed, which is necessary any time the MSM is

replaced.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The soft stops have not been learned.

Action Taken When the DTC Sets

* The tilt and telescope motors will be deactivated.

* Memory recall functions will be disabled.

Conditions for Clearing the DTC

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2010 Cadillac Truck SRX AWD V6-3.0L Page 265

Power Door Latch Description and Operation (See: Body and Frame/Locks/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

Ignition OFF, with the doors closed and locked, approach the vehicle with the keyless entry transmitter and pull the exterior driver door handle. The

driver door should unlock and unlatch allowing the driver door to be pulled open.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the A23D door latch assembly-driver.

2. Connect a test lamp between control circuit terminal 10 and ground.

3. Ignition ON, command the door to UNLATCH by lifting the driver exterior door handle. The test lamp should illuminate during the

UNLATCH command.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal. replace the K84 keyless entry

control module.

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

the K84 keyless entry control module.

4. Connect a test lamp between control circuit terminal 5 and B+.

5. Command the door to UNLATCH by lifting the driver exterior door handle. The test lamp should illuminate during the UNLATCH

command.

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 K84 keyless entry

control module.

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 K84 keyless entry control module.

6. If all circuits test normal, test or replace the A23D door latch assembly-driver.

Repair Instructions

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

* Front Side Door Lock Replacement (See: Body and Frame/Locks/Door Locks/Service and Repair/Front Side Door Lock Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for the keyless entry control module replacement,

setup, and programming

B251A

DTC B251A-B251F

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.

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 1118

Conditions for Clearing the DTC

* DTCs P0601, P0602, P0603, P0604, and P0606 are Type A DTCs.

* DTCs P167D and P2610 are Type B DTCs.

Diagnostic Aids

Verify that the battery cables are clean and tight, and the battery is fully charged. Refer to Battery Inspection/Test (See: Starting and

Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test).

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)

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. 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.

2. DTC P0601, P0602, P0603, P0604, P0606, P167D, or P2610 should not reset.

Circuit/System Testing

1. Test the voltage and ground inputs to the K20 ECM for the following:

* A short

* An open

* High resistance

2. Observe the DTCs with the scan tool.

瀚慖f DTC P0602 is set, attempt to program the K20 ECM before replacing the K20 ECM. Refer to Control Module References (See:

Testing and Inspection/Programming and Relearning).

瀚慖f DTC P0602 resets, replace the K20 ECM.

3. Observe the DTC information with a scan tool. DTC P0601, P0603, P0604, P0606, P167D, or P2610 should not set.

瀚慖f a DTC failed this ignition, replace the K20 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 engine control module replacement, setup, and

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1222

* 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)

* Heated Oxygen Sensor Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical

Diagnostic Procedures/Wiring Repairs/Heated Oxygen Sensor Wiring 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)

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 with a scan tool. Verify no B52 HO2S heater DTCs are set.

瀚慖f a B52 HO2S heater DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Engine running, observe the appropriate scan tool B52 HO2S voltage parameter. The reading should be within the range of 50-1,050 mV.

3. 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 OFF, disconnect the appropriate B52 HO2S harness connector.

2. Ignition ON, observe the appropriate scan tool HO2S voltage parameter. The parameter should display 1.27 V.

瀚慖f less than the specified range, test the high and low signal circuits for a short to ground. If both signal circuit test normal, replace the

K20 ECM.

3. Ignition ON, test for 2.5-3.0 V between the high signal circuit terminal B and ground.

瀚慖f less than the specified range, test the high signal circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

瀚慖f greater than the specified range, test the high signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

4. Ignition OFF, connect a 3 A fused jumper wire between the high signal circuit terminal B and the low signal circuit terminal A.

Note: The low signal circuit is tied to a pull-up circuit within the ECM. A voltage of 0.90-1.10 V on the low signal circuit is normal.

5. Ignition ON, verify the scan tool HO2S parameter displays 0.0 V.

瀚慖f greater than the specified range, test the low signal circuit for an open/high resistance or for a short to voltage. If the circuit tests

normal, replace the K20 ECM.

6. If all circuits test normal, test or replace the appropriate B52 HO2S.

Repair Instructions

Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (See: Powertrain Management/Computers and Control

Systems/Oxygen Sensor/Service Precautions/Heated Oxygen Sensor Resistance Learn Reset Caution).

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

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 1)

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 2)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 1)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 2)

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 326

- Audio Output 3 Left Rear Circuit Short to Ground (LR Door)

DTC B1045 04

- Audio Output 3 Left Rear Circuit Open (LR Door)

DTC B1055 01

- Audio Output 4 Right Rear Circuit Short to Battery (RR Door)

DTC B1055 02

- Audio Output 4 Right Rear Circuit Short to Ground (RR Door)

DTC B1055 04

- Audio Output 4 Right Rear Circuit Open (RR Door)

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 B1085 01

- Audio Output 7 Circuit Short to Battery (LR Shelf)

DTC B1085 02

- Audio Output 7 Circuit Short to Ground (LR Shelf)

DTC B1085 04

- Audio Output 7 Circuit Open (LR Shelf)

DTC B1095 01

- Audio Output 8 Circuit Short to Battery (RR Shelf)

DTC B1095 02

- Audio Output 8 Circuit Short to Ground (RR Shelf)

DTC B1095 04

- Audio Output 8 Circuit Open (RR Shelf)

DTC B1105 01

- Audio Output 9 Circuit Short to Battery (LF I/P Tweeter)

DTC B1105 02

- Audio Output 9 Circuit Short to Ground (LF I/P Tweeter)

DTC B1105 04

- Audio Output 9 Circuit Open (LF I/P Tweeter)

DTC B1115 01

- Audio Output 10 Circuit Short to Battery (RF I/P Tweeter)

DTC B1115 02

- Audio Output 10 Circuit Short to Ground (RF I/P Tweeter)

DTC B1115 04

- Audio Output 10 Circuit Open (RF I/P Tweeter)

Diagnostic Fault Information