2010 Cadillac Truck SRX FWD V6-3.0L Page 1324

2010 Cadillac Truck SRX FWD V6-3.0L Page 1324

Circuit/System Testing

1. Verify the integrity of the entire air induction system including all turbocharger components by inspecting for the following conditions:

* Any damaged components

* Intake air pressure and temperature sensor damage

* A buildup of contamination, snow or ice at the BARO port on the ECM

* Loose or improper installation

* An air flow restriction

* Any vacuum leak

* Any type of air leak between the turbocharger and the throttle body

* An exhaust leak

瀚慖f a condition is found, repair as necessary.

2. Ignition OFF, disconnect the harness connector at the B65 intake air pressure and temperature sensor.

3. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohm

between the low reference circuit terminal 1 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 K20

ECM.

4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.

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

replace the K20 ECM.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

5. Verify the scan tool Boost Pressure Sensor parameter is greater than 250 kPa (36.3 psi).

瀚慖f less than the specified range, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K20 ECM.

6. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 1. Verify the scan tool Boost

Pressure Sensor parameter is less than 1 kPa (0.15 psi).

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

replace the K20 ECM.

7. If the circuits test normal, test or replace the B65 intake air pressure and temperature sensor.

Repair Instructions

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

* Turbocharger Pressure Sensor Replacement () for intake air pressure and temperature sensor replacement

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

programming

P0237

DTC P0236, P0237, or P0238

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 P0236

- Turbocharger Boost System Performance

DTC P0237

- Turbocharger Boost Sensor Circuit Low Voltage

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2010 Cadillac Truck SRX FWD V6-3.0L Page 1444

Circuit/System Testing

1. Ignition OFF, disconnect the B26 crankshaft position sensor connector.

2. Ignition OFF, vehicle systems OFF, this may take 2 minutes, test for less than 3 ohm between low reference circuit terminal 1 and ground.

瀚慖f greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20

ECM.

3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.

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

replace the K20 ECM.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

4. Test for 4.8-5.2 V between the signal circuit terminal 2 and ground.

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

K20 ECM.

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

5. Ignition ON, engine OFF, using a 3 A jumper wire connected to ground, momentarily touch the crankshaft position sensor signal circuit

terminal 2 repeatedly. The Crankshaft Position Active Counter parameter should increment.

瀚慖f the Crankshaft Position Active Counter parameter does not increment, replace the K20 ECM.

瀚慖f the Crankshaft Position Active Counter increments, test or replace the B26 crankshaft position sensor.

Component Testing

Note: You must perform the Circuit/System Testing before proceeding with Component Testing.

1. Inspect the B26 crankshaft position sensor for looseness and correct installation. Remove the crankshaft position sensor from the engine and

inspect the sensor and the O-ring for damage.

瀚慖f the sensor is loose, incorrectly installed, or damaged, repair or replace the B26 crankshaft position sensor.

2. Connect the crankshaft position sensor connector to the crankshaft position sensor. Turn ON the ignition, with the engine OFF.

3. Observe the Crankshaft Position Active Counter parameter with a scan tool. Pass a steel object by the tip of the sensor repeatedly. The

Crankshaft Position Active Counter parameter should increment.

瀚慖f the function does not perform as specified, replace the B26 crankshaft position sensor.

Repair Instructions

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

* Crankshaft Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Crankshaft Position

Sensor/Service and Repair)

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

P0340

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

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2010 Cadillac Truck SRX FWD V6-3.0L Page 2092

Circuit/System Testing

Command the Clutch Pressure Control Solenoid Valve 3 with a scan tool. The value should change from 0.0-1.0 A.

If the value does not change, turn ignition OFF, remove the K71 Transmission Control Module. Connect a test lamp between the low reference

circuit terminal 22 X2 at the K71 Transmission Control Module and the voltage supply component circuit terminal 14 X2 at the K71 Transmission

Control Module. Command the Clutch Pressure Control Solenoid Valve 3 with a scan tool. The test lamp has to illuminate brighter with increasing

current.

If the test lamp always illuminate or always does not illuminate, replace the K71 Transmission Control Module.

Component Testing

Static Test

1. Ignition OFF, remove the K71 Transmission Control Module.

2. Test for 5-5.6 ohm at 20掳C (68掳F) between the low reference circuit terminal 22 X2 and the voltage supply circuit terminal 14 X2.

瀚慖f less than the specified range, test the wiring harness for internal short. If the circuit test normal, replace the Q27C Pressure Control

Solenoid Valve 3.

3. Test for infinite resistance between each terminal and the low reference circuit terminal 22 X2 and also to the voltage supply circuit terminal

14 X2.

瀚慖f less than the specified range, replace the wiring harness.

4. If all circuit test normal, perform the control solenoid valve inspection. Refer to Control Solenoid Valve Inspection (M36 and MXE) (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/AF40-6 -

Automatic Transmission).

瀚慖f the inspection test normal, replace the control valve body.

Repair Instructions

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

* Control valve body replacement-Refer to Control Valve Body Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Valve Body/Service and Repair/AF40-6 - Automatic Transmission/Control Valve Body Replacement).

* TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning).

* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).

* Wiring harness-Refer to Automatic Transmission Wiring Harness Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Wiring Harness/Service and Repair).

6T70/6T75 - Automatic Transmission

DTC P2719-P2721

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 P2719

- Clutch Pressure Control (PC) Solenoid 4 System Performance

DTC P2720

- Clutch Pressure Control (PC) Solenoid 4 Control Circuit Low Voltage

DTC P2721

- Clutch Pressure Control (PC) Solenoid 4 Control Circuit High Voltage

Diagnostic Fault Information

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2010 Cadillac Truck SRX FWD V6-3.0L Page 2136

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF, remove the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly

Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission and

Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic Transmission/Control

Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect the DT-47825-20 adapter harness between the vehicle wire harness electrical connector, and the control solenoid valve assembly

electrical connector.

5. Ignition ON, verify with a scan tool the following test status parameters display OK:

* TCC PC Sol. Perf. Test Status

* TCC PC Sol. Ctrl. Ckt. High Voltage Test Status

* TCC PC Sol. Ctrl. Ckt. Low Voltage Test Status

瀚慖f any test status parameter displays Fault or Malfunction, replace the control solenoid valve assembly.

Repair Instructions

Note:

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission

and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

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 solenoid valve assembly replacement, setup,

and programming

AF40-6 - Automatic Transmission

DTC P2759 or P2762-P2764

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 P2759

- Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Performance

DTC P2762

- Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Performance

DTC P2763

- Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit High Voltage

DTC P2764

- Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit Low Voltage

Diagnostic Fault Information

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2010 Cadillac Truck SRX FWD V6-3.0L Page 1330

Circuit/System Testing

1. Verify the integrity of the entire air induction system including all turbocharger components by inspecting for the following conditions:

* Any damaged components

* Intake air pressure and temperature sensor damage

* A buildup of contamination, snow or ice at the BARO port on the ECM

* Loose or improper installation

* An air flow restriction

* Any vacuum leak

* Any type of air leak between the turbocharger and the throttle body

* An exhaust leak

瀚慖f a condition is found, repair as necessary.

2. Ignition OFF, disconnect the harness connector at the B65 intake air pressure and temperature sensor.

3. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohm

between the low reference circuit terminal 1 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 K20

ECM.

4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.

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

replace the K20 ECM.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

5. Verify the scan tool Boost Pressure Sensor parameter is greater than 250 kPa (36.3 psi).

瀚慖f less than the specified range, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K20 ECM.

6. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 1. Verify the scan tool Boost

Pressure Sensor parameter is less than 1 kPa (0.15 psi).

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

replace the K20 ECM.

7. If the circuits test normal, test or replace the B65 intake air pressure and temperature sensor.

Repair Instructions

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

* Turbocharger Pressure Sensor Replacement () for intake air pressure and temperature sensor replacement

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

programming

P0244

DTC P0244-P0246

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 P0244

- Turbocharger Wastegate Solenoid Valve Control Performance

DTC P0245

- Turbocharger Wastegate Solenoid Valve Control Circuit Low Voltage

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Circuit/System Testing

1. Ignition ON, observe the DTC information with a scan tool. Verify that none of the following DTCs are set. DTC P0010, P0013, P0020,

P0023, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, or P0391.

瀚慖f any of the DTCs listed are set refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

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

2. Idle the engine at normal operating temperature. DTCs P0016, P0017, P0018, or P0019 should not set.

瀚慖f a DTC sets, inspect for the following and repair as necessary:

* The correct installation of the camshaft sensors

* The correct installation of the crankshaft sensor

* A timing chain tensioner condition

* An incorrectly installed timing chain

* Excessive play in the timing chain

* A mechanical cam actuator that is stuck in the full advance or retard position.

* A timing chain that jumped teeth

* A crankshaft reluctor wheel that has moved in relationship to top dead center (TDC) on the crankshaft

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.

Repair Instructions

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

* Timing Chain Alignment Diagram (See: Engine, Cooling and Exhaust/Engine/Timing Components/Timing Component Alignment

Marks/Locations)

* Camshaft Timing Drive Components Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/81.

Camshaft Timing Drive Components Cleaning and Inspection)

* Crankshaft and Bearing Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/66. Crankshaft

and Bearing Cleaning and Inspection)

P018B

DTC P018B-P018D

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 P018B

- Fuel Pressure Sensor Performance

DTC P018C

- Fuel Pressure Sensor Circuit Low Voltage

DTC P018D

- Fuel Pressure Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 1132

Circuit/System Testing

Note: You must perform Circuit/System Verification first.

1. Ignition OFF, remove the automatic transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement ().

2. Disconnect the IMS connector at the Q8 control solenoid valve assembly.

Note: Under certain driving conditions, DTC P182E could set due to an intermittent low voltage fault on the P/N signal circuit, before

conditions for setting DTC P0851 are met.

3. Ignition ON, verify the scan tool engine control module (ECM) P/N switch displays In Gear.

瀚慖f not the specified value, test the P/N signal circuit for a short to ground. If the circuit tests normal, replace the engine control module.

4. Verify the scan tool IMS A/B/C/P parameter displays HI for all four signal circuits.

瀚慖f not the specified value, replace the Q8 control solenoid valve assembly.

5. Connect a 3A fused jumper wire between each transmission range signal circuit terminals listed below and the IMS ground circuit. The

appropriate scan tool IMS A/B/C/P parameter should display LOW when the terminal is connected to the IMS ground circuit.

* Switch Signal A: terminal E to terminal A

* Switch Signal B: terminal D to terminal A

* Switch Signal C: terminal C to terminal A

* Switch Signal P: terminal P to terminal A

瀚慖f not the specified value, replace the Q8 control solenoid valve assembly.

6. If all circuits test normal, test or replace the IMS.

Repair Instructions

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

Note:

* Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/Control Solenoid Valve and Transmission Control

Module Assembly Inspection) before replacing any internal transmission components.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning/Service Fast Learn Adapts) following all transmission repairs.

* Manual Shift Shaft Position Switch Replacement (See: Powertrain Management/Computers and Control Systems/Sensors and Switches -

Computers and Control Systems/Transmission Position Sensor/Switch/Service and Repair/Manual Shift Shaft Position Switch Replacement)

for internal mode switch (IMS) replacement.

* Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement,

setup, and programming.

P0191

DTC P0191 (w/LLT)

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 P0191

- Fuel Rail Pressure Sensor Performance

Diagnostic Fault Information

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Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the CHMSL.

2. Ignition OFF, test for less than 5.0 ohm between the ground circuit terminal B and ground.

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

3. Connect a test lamp between the control circuit terminal A and the ground circuit terminal B.

4. Ignition ON, turn the stop lamps ON and OFF by applying and releasing the brake pedal. The test lamp should turn ON and OFF when

changing between the selected states.

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 BCM.

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 BCM.

5. If all circuits test normal, replace the CHMSL.

Repair Instructions

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

* High Mount Stop Lamp Replacement (Sedan, V-Series) (See: Lighting and Horns/Center Mounted Brake Lamp/Service and Repair)High

Mount Stop Lamp Replacement (Wagon) (See: Lighting and Horns/Center Mounted Brake Lamp/Service and Repair)

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

B3567

DTC B3567

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 B3567 01

- Driver Information Center Select Switch Circuit Short to Battery

DTC B3567 59

- Driver Information Center Select Switch Circuit/Component Protection Time-Out

Diagnostic Fault Information

Circuit/System Description

The driver information center (DIC) switch is a multiplexed switch. Battery power is provided to the DIC switch via the instrument panel cluster

(IPC). The DIC switch signal circuit is pulled up to battery voltage in the IPC. The IPC also provides the DIC switch with a low reference. The

switch input to the IPC is pulled low when a switch is activated. The DIC switch is a momentary contact switch that connects a series of resistors in

a resistor ladder format. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs. Each switch state - Set/Reset,

Trip/Fuel, Vehicle Information, Personalization, INFO UP, INFO DOWN - corresponds to a certain resistance value. The IPC determines the

switch pressed by the voltage drop across the resistors.

Conditions for Running the DTC

The ignition is in ACCESSORY or RUN.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 341

Circuit/System Testing

Driver Window Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.

2. Ignition ON, verify that the scan tool Driver Window Main Control Down Switch parameter is Inactive.

瀚慖f not the specified value, test the control circuit terminal 3 for a short to ground. If the circuit tests normal, test or replace the M74D

window motor-driver.

3. Verify that the scan tool Driver Window Main Control Up Switch parameter is Inactive.

瀚慖f not the specified value, test the control circuit terminal 6 for a short to ground. If the circuit tests normal, test or replace the M74D

window motor-driver.

4. Verify that the scan tool Driver Window Main Control Express Switch parameter is Inactive.

瀚慖f not the specified value, test the control circuit terminal 2 for a short to ground. If the circuit tests normal, test or replace the M74D

window motor-driver.

5. If all circuits test normal, test or replace the S79D window switch-driver.

Passenger Switch Window Malfunction

1. Ignition OFF, disconnect the harness connector at the S79P window switch-passenger.

2. Ignition ON, test for greater than 10V between the signal circuit terminal listed below and ground:

* Signal circuit terminal 6

* Signal circuit terminal 7

* Signal circuit 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, test or

replace the M74P window motor-passenger.

3. If all circuits test normal, test or replace the S79P window switch-passenger.

Repair Instructions

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

* Front Side Door Window and Multifunction Switch Replacement (See: Windows and Glass/Windows/Service and Repair/Front Side Door

Window and Multifunction Switch Replacement)

* Rear Side Door Window Switch Replacement (See: Windows and Glass/Windows/Service and Repair/Rear Side Door Window Switch

Replacement)

* Rear Side Door Window Regulator Motor Replacement (See: Windows and Glass/Windows/Service and Repair/Rear Side Door Window

Regulator Motor Replacement)

B318A

DTC B316B, B317A, B318A, or B319A

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 B316B 00

- Driver Window Switch

DTC B316B 02

- Driver Window Switch Short to Ground

DTC B316B 39

- Driver Window Switch Internal Malfunction

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2010 Cadillac Truck SRX AWD V6-3.0L Page 251

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the K8A Blower Motor Control Module.

2. Test for less than 5 ohm between the ground circuit X1 terminal 4 and ground.

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

3. Ignition ON, verify that a test lamp illuminates between the B+ circuit X1 terminal 2 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Connect a DMM between the control circuit X1 terminal 1 and B+.

5. Cycle the blower motor from OFF to HIGH. The voltage should increase while changing between the commanded states.

瀚慖f voltage remains greater than 11.5 V while changing between the commanded states, test the control circuit for a short to voltage. If the

circuit test normal, replace the K33 HVAC Control Module.

瀚慖f voltage remains less than 1.0 V while changing between the commanded states, test the control circuit for a short to ground or an

open/high resistance. If the circuit tests normal, replace the K33 HVAC Control Module.

瀚慖f voltage is between 1.0-11.5 V and does not increase when changing between the commanded states, replace the K33 HVAC Control

Module.

6. Ignition OFF, connect the X1 harness connector at the K8A Blower Motor Control Module and disconnect the harness connector at the M8A

Blower Motor.

7. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal B and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K8A Blower Motor Control Module.

8. Connect a test lamp between the B+ circuit terminal B and the control circuit terminal A.

9. Turn the blower motor on high speed then to low speed. The test lamp intensity should be bright when in high speed and very dim or off

when the blower is on low speed.

瀚慖f the test lamp intensity does not vary, test the control circuit for a short to voltage, short to ground, or an open/high resistance. If the

circuit tests normal, replace the K8A Blower Motor Control Module.

10. If all circuits test normal, replace the M8A Blower Motor.

Repair Instructions

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

* HVAC Component Replacement Reference (See: Heating and Air Conditioning/Service and Repair/Removal and Replacement)

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

programming

B0223

DTC B0223, B022A, B0233, B023A, B0408, B0418, B0428, or B3531

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 B0223 01

- Recirculate Position Command 1 Circuit Short to Battery

DTC B0223 06

- Recirculate Position Command 1 Circuit Low Voltage/Open

DTC B022A 01

- Recirculate Position Command 2 Circuit Short to Battery

2010 Cadillac CTS Sedan AWD V6-3.6L Page 988

2010 Cadillac CTS Sedan AWD V6-3.6L Page 988

Circuit/System Testing

Note: Circuit/System Verification must be performed first or misdiagnosis may result.

1. Ignition ON, observe the scan tool fuel pump control module fuel line pressure sensor parameter. Command an increase in the fuel line

pressure with a scan tool. Verify the fuel line pressure increases to greater than 414 kPa (60 psi) as commanded.

瀚慖f the less than the specified range, refer to Fuel System Diagnosis (See: Powertrain Management/Computers and Control

Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel System Diagnosis).

Note: As little as 2 ohm on either circuit of the high pressure fuel pump actuator will cause these DTCs to set. Test the circuits of the high

pressure fuel pump actuator for a high resistance if you suspect a condition.

2. Remove the G18 high pressure fuel pump and visually inspect the lobes on the camshaft for unusual wear.

瀚慖f the lobes appear normal, replace the G18 high pressure fuel pump.

瀚慖f the lobes are worn, replace the camshaft.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the high pressure fuel pump.

Note: The DMM and test leads must be calibrated to 0 ohm in order to prevent misdiagnosis.

2. Test for 0.35-0.6 ohm at 20掳C (68掳F) of resistance between low control circuit terminal 1 and high control circuit terminal 2.

瀚慖f the resistance is less than 0.3 ohm or greater than 0.6 ohm, replace the high pressure fuel pump.

3. Test for infinite resistance between each terminal and the high pressure fuel pump housing/case.

瀚慖f not the specified value, replace the high pressure fuel pump.

Dynamic Test

Engine idling, command the Fuel Pressure Control to Increase with a scan tool. The Fuel Rail Pressure Sensor parameter should increase with each

command.

If the Fuel Rail Pressure Sensor parameter does not increase with each command, replace the high pressure fuel pump.

Repair Instructions

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

* Camshaft Removal - Left Side (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/36. Camshaft Removal - Left Side)

* Fuel Pump Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Service and Repair)

P0090

DTC P0090, P0091, or P0092 (w/LLT)

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 P0090

- Fuel Pressure Regulator Control Circuit

DTC P0091

- Fuel Pressure Regulator Control Circuit Low Voltage

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2995

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2995

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector of the yaw rate sensor.

2. Ignition ON, verify that a test lamp illuminates between the module voltage circuit and ground.

瀚慖f the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the

EBCM.

3. Ignition OFF, test for less than 5 ohms between the module ground circuits and ground.

瀚慖f greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

4. If all circuits test normal, replace the yaw rate sensor.

Repair Instructions

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

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

Procedures/Wiring Repairs/GMLAN Wiring Repairs)

* ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and

Operation/ABS Description and Operation) for the ABS - Hybrid

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Less than 3900 kg

(8600 lb) GVW

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Greater than/Equal to

3900 kg (8600 lb) GVW

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

U2158

DTC U2105-U2199

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 U2142 00

- Lost Communication With Yaw Rate Sensor (YRS)

Circuit/System Description

Modules connected to the CAN bus serial data circuits monitor for serial data communications during normal vehicle operation. Operating

information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be

exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an

availability indication of the transmitter module. Each message contains the identification number of the transmitter module.

The electronic brake control module (EBCM) activates the other modules connected to the CAN serial data circuits by applying voltage when the

ignition key is in ACC, ON or START. The EBCM, Yaw Rate and Lateral Acceleration Sensor are the only modules connected to the CAN bus

serial data circuits. For more information on CAN bus serial data refer to Data Link Communications Description and Operation (See: Powertrain

Management/Computers and Control Systems/Information Bus/Description and Operation).

Conditions for Running the DTC

* The system voltage is between 9-16 volts.

* The vehicle power mode master requires serial data communication to occur.

Conditions for Setting the DTC

A supervised periodic message that includes the transmitter module availability has not been received.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 997

2010 Cadillac CTS Sedan AWD V6-3.6L Page 997

Circuit/System Testing

1. Verify that DTCs P0685, P0689, P0690 or B1380 are not set.

瀚慖f any of the DTCs are set, refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code

Descriptions/Powertrain Diagnostic Trouble Code (DTC) Type Definitions).

2. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.

3. Ignition OFF, test for less than 5 ohm between the ground circuit terminal C and the battery ground.

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

Caution: Do NOT use the low reference circuit in the component harness connector for this test. Damage to the control module may occur

due to excessive current draw.

4. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and

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

5. Test for 4.8-5.2 V between the signal circuit terminal A and the ground circuit terminal C.

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

normal, replace the K20 ECM.

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

ECM.

6. Ignition OFF, connect the red lead of the J 38522 to the signal circuit terminal A at the B75B MAF/IAT sensor harness connector. Connect

the battery voltage supply to B+, and ground the black lead.

7. Set the J 38522 Signal switch to 5 V, the Frequency switch to 5K, and the Duty Cycle switch to Normal.

8. Ignition ON, observe the scan tool MAF Sensor frequency parameter. The parameter should be between 4,950-5,025 Hz.

瀚慖f the parameter is not within the specified range, replace the K20 ECM.

9. If all circuits/connections test normal, replace the B75B MAF/IAT sensor.

Repair Instructions

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

* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (LLT) (See: Powertrain Management/Computers and Control

Systems/Air Temperature Sensor ( Ambient / Intake )/Service and Repair)Mass Airflow Sensor with Intake Air Temperature Sensor

Replacement (LSA) (See: Powertrain Management/Computers and Control Systems/Air Temperature Sensor ( Ambient / Intake )/Service

and Repair)Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (LF1) (See: Powertrain Management/Computers and

Control Systems/Air Temperature Sensor ( Ambient / Intake )/Service and Repair)

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

programming

P0101

DTC P0101 (w/LLT)

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 P0101

- Mass Air Flow (MAF) Sensor Circuit Performance

Diagnostic Fault Information

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2938

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2938

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector of the yaw rate sensor.

2. Ignition ON, verify that a test lamp illuminates between the module voltage circuit and ground.

瀚慖f the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the

EBCM.

3. Ignition OFF, test for less than 5 ohms between the module ground circuits and ground.

瀚慖f greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

4. If all circuits test normal, replace the yaw rate sensor.

Repair Instructions

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

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

Procedures/Wiring Repairs/GMLAN Wiring Repairs)

* ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and

Operation/ABS Description and Operation) for the ABS - Hybrid

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Less than 3900 kg

(8600 lb) GVW

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Greater than/Equal to

3900 kg (8600 lb) GVW

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

U2130

DTC U2105-U2199

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 U2142 00

- Lost Communication With Yaw Rate Sensor (YRS)

Circuit/System Description

Modules connected to the CAN bus serial data circuits monitor for serial data communications during normal vehicle operation. Operating

information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be

exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an

availability indication of the transmitter module. Each message contains the identification number of the transmitter module.

The electronic brake control module (EBCM) activates the other modules connected to the CAN serial data circuits by applying voltage when the

ignition key is in ACC, ON or START. The EBCM, Yaw Rate and Lateral Acceleration Sensor are the only modules connected to the CAN bus

serial data circuits. For more information on CAN bus serial data refer to Data Link Communications Description and Operation (See: Powertrain

Management/Computers and Control Systems/Information Bus/Description and Operation).

Conditions for Running the DTC

* The system voltage is between 9-16 volts.

* The vehicle power mode master requires serial data communication to occur.

Conditions for Setting the DTC

A supervised periodic message that includes the transmitter module availability has not been received.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1103

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1103

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate HO2S.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal C and ground.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and

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

3. Ignition OFF, connect a test lamp between the heater control circuit terminal D and B+. The test light should not illuminate.

瀚慖f the test lamp illuminates, test the heater control circuit for a short to ground. If the circuit/connections test normal, replace the ECM.

4. Idle the engine, verify the test lamp illuminates or flashes.

瀚慖f the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the ECM.

Note: The control circuit for the HO2S heater is pulled-up to voltage within the ECM, 2.0-3.0 V on the control circuit is normal.

5. Ignition ON, test for 2.0-3.0 V between the control circuit terminal D and ground.

瀚慖f not within the specified range, test the control circuit for a short to voltage. If the circuit/connections test normal, replace the ECM.

6. If all circuits/connections test normal, test or replace the HO2S.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate HO2S.

2. Test for 5-25 ohm between terminals C and D of the HO2S.

瀚慖f not within the specified range, replace the HO2S.

Repair Instructions

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 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* 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 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* 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 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* 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 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

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

programming

P0157

DTC P0137, P0138, P0140, P0157, P0158, or P0160 (With LLT)

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 P0137

- HO2S Circuit Low Voltage Bank 1 Sensor 2

2010 Cadillac Truck SRX AWD V6-3.0L Page 476

2010 Cadillac Truck SRX AWD V6-3.0L Page 476

Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors X1, X2, X4, X5, and X6 at the K9 BCM.

2. Ignition OFF, test for less than 3.0 Ohms between the ground circuit terminals listed below and ground:

* Terminal 1 X1

* Terminal 2 X2

瀚慖f not within the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminals listed below and ground:

* Terminal 2 X1

* Terminal 3 X1

* Terminal 4 X1

* Terminal 1 X2

* Terminal 3 X2

* Terminal 4 X2

* Terminal 20 X4

* Terminal 3 X5

* Terminal 4 X5

瀚慖f the test lamp does not illuminate, test the B+ circuits for a short to ground or an open/high resistance.

4. If all the circuits test normal, test or replace the K9 BCM.

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 BCM replacement, setup, and programming

B1527

DTC B1527

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 B1527 00

- High Parasitic Load Detected

Circuit/System Description

The body control module (BCM) monitors the state of charge of the electrical system. If the BCM senses that the state of charge at ignition On is 30

percent lower than what it was when the engine was running.

Conditions for Running the DTC

The ignition must be in Accessory or Run mode for this code to set.

Conditions for Setting the DTC

The state of charge at ignition ON is 30 percent lower than when the engine was running and battery drain is more than 2 A.

Action Taken When the DTC Sets

There is no battery telltale illuminated or DIC message displayed.

Conditions for Clearing the DTC

2010 Cadillac Truck SRX AWD V6-3.0L Page 219

2010 Cadillac Truck SRX AWD V6-3.0L Page 219

Circuit/System Testing

1. Ignition OFF, disconnect the KR73 ignition main relay.

2. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 ohm

between the relay ground circuit and ground.

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

3. Ignition ON, verify that a test lamp illuminates between the relay B+ circuit and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Connect a test lamp between the relay control circuit and ground.

5. Cycle the ignition ON and OFF. The test lamp should turn ON and OFF when changing S39 ignition switch positions.

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 K9 BCM.

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

K9 BCM.

6. If all circuits test normal, test or replace the KR73 ignition main relay.

Component Testing

1. Ignition OFF, disconnect the KR73 ignition main relay.

2. Test for 70-150 Ohms between terminals 85 and 86.

瀚慖f the resistance is not within the specified range, replace the KR73 ignition main 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 less than specified, replace the KR73 ignition main relay.

4. Install a 3 A fused jumper wire between relay terminal 86 and 12 V. Install a jumper wire between relay terminal 85and ground. Measure for

less than 5 Ohms between terminals 87 and 30.

瀚慖f greater than specified, replace the KR73 ignition main relay.

Repair Instructions

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

* 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

B144B

DTC B144B

Diagnostic Instructions

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

Check - Vehicle) 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)

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)Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B144B 01

- Run/Start Power Relay Circuit Short to Battery

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1024

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1024

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.

2. Ignition OFF, all vehicle systems OFF, this may take up to 2 minutes, test for less than 5 ohm between the low reference circuit terminal A or

terminal 2 and ground.

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

normal, replace the K20 ECM.

3. Ignition ON, verify the scan tool IAT parameter is colder than -39掳C (-38掳F).

瀚慖f greater than the specified range, test the signal circuit terminal B or terminal 1 for a short to ground. If the circuit tests normal, replace

the K20 ECM.

Note: If the fuse in the jumper wire opens, the signal circuit is shorted to voltage and the sensor may be damaged.

4. Install a 3 A fused jumper wire between the signal circuit terminal B or terminal 1 and ground. Verify the scan tool IAT parameter is greater

than 149掳C (300掳F).

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

the K20 ECM.

5. If all circuits test normal, test or replace the B75B MAF/IAT sensor.

Component Testing

Measure and record the resistance of the B66 IAT sensor at various ambient temperatures, then compare those measurements to the Temperature

Versus Resistance - Intake Air Temperature Sensor (See: Powertrain Management/Computers and Control Systems/Specifications) table.

Repair Instructions

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

* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (LLT) (See: Powertrain Management/Computers and Control

Systems/Air Temperature Sensor ( Ambient / Intake )/Service and Repair)Mass Airflow Sensor with Intake Air Temperature Sensor

Replacement (LSA) (See: Powertrain Management/Computers and Control Systems/Air Temperature Sensor ( Ambient / Intake )/Service

and Repair)Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (LF1) (See: Powertrain Management/Computers and

Control Systems/Air Temperature Sensor ( Ambient / Intake )/Service and Repair)

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

P0116

DTC P0116 (w/LLT)

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 P0116

- Engine Coolant Temperature (ECT) Sensor Performance

Diagnostic Fault Information

Typical Scan Tool Data

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2563

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2563

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly

Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission and

Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6L45/6L50/6L80/6L90 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve assembly

electrical connector.

5. Ignition ON, verify with a scan tool the following test status parameters display OK:

* Pressure Control Solenoid Valve 4 Performance Test Status

* Pressure Control Solenoid Valve 4 Control Circuit High Voltage Test Status

* Pressure Control Solenoid Valve 4 Control Circuit Low Voltage Test Status

瀚慖f any test status parameter displays Fault or Malfunction, replace the Q8 control solenoid valve assembly.

Repair Instructions

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

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

* Replace the control solenoid valve assembly. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

P2723

DTC P2723 or P2724

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 P2723

- Clutch Pressure Control (PC) Solenoid 5 - Stuck Off

DTC P2724

- Clutch Pressure Control (PC) Solenoid 5 - Stuck On

Circuit/System Description

The clutch pressure control (PC) solenoid 5 is part of the control solenoid valve assembly, which has no serviceable parts. The PC solenoid 5

regulates transmission fluid pressure to the 1-2-3-4 clutch regulator valve which controls pressure to the 1-2-3-4 clutch. The TCM calculates gear

ratio based on the RPM signals from the input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the expected

transmission gear ratio to the calculated gear ratio for each commanded gear.

Conditions for Running the DTC

P2723

* DTCs P0716, P0717, P0722, P0723, P1825, or P1915 are not set.

* The transmission input shaft speed is greater than 60 RPM.

* 1-2-3-4 clutch is commanded ON.

P2724

* DTCs P0716, P0717, P0722, P0723, P1825, or P1915 are not set.

* The transmission input speed is equal to or greater than 200 RPM.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1148

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1148

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.

* Fuel Injector 1 terminal 8 X117

* Fuel Injector 2 terminal 2 X116

* Fuel Injector 3 terminal 9 X117

* Fuel Injector 4 terminal 4 X116

* Fuel Injector 5 terminal 10 X117

* Fuel Injector 6 terminal 6 X116

4. Crank or start the engine while observing the test lamp. The test lamp should flash several times and then stop when the DTC sets.

Note: Four of the injector high voltage supply circuits are paired in the controller with a dual driver, refer to Diagnostic Aids.

瀚慖f the test lamp is always ON, test the high voltage supply circuit for a short to voltage. If the circuit tests normal, replace the ECM.

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

normal, replace the ECM.

5. Clear the DTC information with a scan tool, then cycle the ignition OFF.

6. Connect a test lamp between B+ and the high voltage control circuit terminal of the appropriate injector listed below.

* Fuel Injector 1 terminal 2 X117

* Fuel Injector 2 terminal 1 X116

* Fuel Injector 3 terminal 3 X117

* Fuel Injector 4 terminal 3 X116

* Fuel Injector 5 terminal 4 X117

* Fuel Injector 6 terminal 5 X116

7. Ignition ON, the test lamp should not illuminate.

瀚慖f the test lamp is ON, test the high voltage control circuit for a short to ground. If the circuit tests normal, replace the ECM.

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

* Fuel Injector 1 terminal 2 X117

* Fuel Injector 2 terminal 1 X116

* Fuel Injector 3 terminal 3 X117

* Fuel Injector 4 terminal 3 X116

* Fuel Injector 5 terminal 4 X117

* Fuel Injector 6 terminal 5 X116

9. Ignition ON, the test lamp should not illuminate.

瀚慖f the test lamp is ON, test the high voltage control circuit for a short to voltage. If the circuit tests normal, replace the ECM.

10. Clear the DTC information with a scan tool, then cycle the ignition OFF.

11. Ignition OFF, connect a test lamp between the high voltage supply circuit terminal and the high voltage control circuit terminal of the

appropriate injector listed below.

* Fuel Injector 1 terminal 8 and terminal 2 X117

* Fuel Injector 2 terminal 2 and terminal 1 X116

* Fuel Injector 3 terminal 9 and terminal 3 X117

* Fuel Injector 4 terminal 4 and terminal 3 X116

* Fuel Injector 5 terminal 10 and terminal 4 X117

* Fuel Injector 6 terminal 6 and terminal 5 X116

12. Crank or start the engine while observing the test lamp. The test lamp should flash several times and then stop when the DTC sets.

瀚慖f the test lamp does not flash, test the high voltage control circuit for an open/high resistance. If the circuit tests normal, replace the

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.