2010 Cadillac Truck SRX AWD V6-3.0L Page 1105

2010 Cadillac Truck SRX AWD V6-3.0L Page 1105

Action Taken When the DTC Sets

* DTCs P0090, P0091, P0092, P00C8, P00C9, and P00CA are Type A DTCs.

* A message center or an indicator displays Reduced Engine Power.

Conditions for Clearing the DTC

DTCs P0090, P0091, P0092, P00C8, P00C9, and P00CA are Type A DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics (LAU) (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/Connector End Views By Name)

Description and Operation

Fuel System Description (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel System

Description)Fuel System Description (LAU or LY7) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and

Operation/Fuel System Description)

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)

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. Observe the DTC information with a scan tool. DTC P0090, P0091, P0092, P00C8, P00C9, P00CA, P0685, or P1682 should not set.

瀚慖f a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble

Code (DTC) List - Vehicle).

2. Ignition ON, command the Fuel Pressure Regulator ON and OFF with a scan tool while observing the following control circuit status

parameters:

* Fuel Pressure Regulator Control Circuit High Voltage Test Status

* Fuel Pressure Regulator Control Circuit Open Test Status

* Fuel Pressure Regulator Control Circuit Low Voltage Test Status

* Fuel Pressure Regulator High Control Circuit High Voltage Test Status

* Fuel Pressure Regulator High Control Circuit Open Test Status

* Fuel Pressure Regulator High Control Circuit Low Voltage Test Status

Each parameter should toggle between OK and Not Run or Not Run and OK.

3. Engine idling, observe the Fuel Rail Pressure Sensor parameter with a scan tool. The pressure should be approximately 1.9-2.1 MPa (279-305

psi).

4. Command an increase and decrease in fuel rail pressure with a scan tool. Observe the scan tool Fuel Rail Pressure Sensor parameter. The

Fuel Rail Pressure Sensor should increase or decrease with each command.

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 OFF, disconnect the harness connector at the G18 high pressure fuel pump.

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Circuit/System Verification

Verify DTC B3122, B3123, or B3124 is not set.

If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic

Trouble Code (DTC) List - Vehicle).

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the T10G rear fascia keyless entry antenna.

2. Ignition ON, test for less than 1 V between the signal circuit terminal 1 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 K84 keyless entry

control module.

3. Ignition OFF, install a DMM between the signal circuit terminal 1 and ground. Set the DMM to capture DC voltage using the MIN MAX

function.

4. Lock the vehicle using the keyless entry transmitter.

5. Activate the antenna by pressing the rear closure touch pad. Verify the MAX voltage captured by the DMM is greater than.5 V.

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 K84 keyless entry control module.

6. Install a DMM between the signal circuit terminal 1 and the low reference circuit terminal 2. Set the DMM to capture DC voltage using the

MIN MAX function.

7. Lock the vehicle using the keyless entry transmitter.

8. Activate the antenna by pressing the rear closure touch pad. Verify the MAX voltage captured by the DMM is greater than.5 V.

瀚慖f less than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K84

keyless entry control module.

9. If all circuits test normal, replace the T10G rear fascia keyless entry antenna. Verify DTC B3121 is not set.

瀚慖f the DTC is set, replace the K84 keyless entry control module.

Repair Instructions

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

* Ignition Lock Key Transmitter Antenna Replacement - Rear Bumper Fascia (See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Keyless Entry/Antenna - Keyless Entry/Service and Repair/Ignition Lock Key Transmitter Antenna Replacement - Rear Bumper

Fascia)

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

and programming

B3122

DTC B3122

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 B3122 02

- Keyless Entry Antenna 4 Short to Ground

DTC B3122 05

- Keyless Entry Antenna 4 High Voltage/Open

Diagnostic Fault Information

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4. Command the Park Assist Switch LED output control OFF with the scan tool. Test for less than 0.3 V between the ignition circuit terminal 3

and the signal circuit terminal 6.

瀚慖f greater than the specified value, test the signal circuit for a short to ground. If all circuits test normal, replace the K41 parking assist

control module.

5. If all circuits test normal, replace the S48E multi-function switch module - center console.

Repair Instructions

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

* Accessory Switch Replacement (See: Instrument Panel, Gauges and Warning Indicators/Service and Repair)

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

programming and setup

B0968

DTC B0967 or B0968

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 B0967 02

- Parking Aid On/Off Switch Circuit Short to Ground

DTC B0968 01

- Parking Aid On/Off Switch Indicator Circuit Short to Battery

DTC B0968 06

- Parking Aid On/Off Switch Indicator Circuit Low Voltage/Open

Diagnostic Fault Information

Circuit/System Description

The parking assist can be activated/deactivated by pressing the parking assist switch. By engaging the reverse gear the parking assist can also be

activated. By subsequently pressing the parking assist switch the parking assist can be disabled again.

The indicator in the parking assist switch shows the status of the parking assist. If the lamp is ON, the parking assist is activated.

Conditions for Running the DTC

* Ignition ON

* The parking assist is activated. The activation takes place by putting in the reverse gear or by pressing the parking assist switch.

Conditions for Setting the DTC

B0967 02

The parking assist control module has detected a short to ground.

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Repairs/Wiring Repairs)

Scan Tool Reference

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

Circuit/System Verification

Ignition ON, observe the scan tool Vertical Wheel Acceleration parameters. The parameters should be 0 m/s(2) when the vehicle is parked on a

level surface.

Circuit/System Testing

1. Ignition ON, verify that DTC C0870 is not present.

瀚慖f the DTC is present, refer to DTC C0870 (See: C Code Charts/C0870) to diagnose that DTC prior to this diagnostic.

2. Ignition OFF, disconnect the harness connector at the appropriate B161 vertical suspension acceleration sensor.

3. Ignition OFF, open/close doors, and wait 60 seconds. Test for less than 5 ohm between the low reference circuit terminal C and ground.

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

replace the K19 Suspension Control Module.

4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal A 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 K19 suspension control module.

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 K19

suspension control module.

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

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 K19 suspension control 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 K19 suspension

control module.

6. If all circuits test normal, replace the B161 vertical suspension acceleration sensor. Verify the DTC does not reset. If the DTC resets, replace

the K19 suspension control module

Repair Instructions

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

* Electronic Suspension Front Vertical Accelerometer Replacement - Lower (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Acceleration Sensor/Service and Repair/Electronic Suspension Front Vertical Accelerometer

Replacement - Lower)

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

and programming

C0675

DTC C0670 or C0675

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 C0670 02

- Left Front Acceleration or Position Sensor Circuit Short to Ground

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the K17 EBCM.

3. Install a 3 A fused jumper wire at the signal circuit terminal B. Verify the scan tool Wheel Speed Sensor parameter changes while rapidly

tapping the fused jumper wire to the low reference circuit terminal A.

瀚慖f no change is observed, disconnect the harness connector at the K17 EBCM and test for the following conditions below. If all circuits

test normal, replace the K17 EBCM.

* Signal circuit for short to voltage.

* Low reference circuit for a short to voltage, short to ground, or an open/high resistance.

4. If all circuits test normal, test or replace the B5 wheel speed sensor.

Component Testing

Note: The following wheel speed sensor test is polarity sensitive. The wheel speed sensor can be permanently damaged if the polarity is reversed

during the test.

1. Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor.

2. Connect a 3 A fused jumper wire between the signal terminal 1 and 12 V.

3. Connect a DMM set to read DC amperage between the low reference terminal 2 and ground.

4. Spin the wheel very slowly, test for a DC current switching between a low value of 4-8 mA and a high value of 11-16 mA.

瀚慖f not within the specified range, replace the B5 wheel speed sensor.

Repair Instructions

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

* Front Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed

Sensor/Service and Repair/Front Wheel Speed Sensor Replacement)

* Rear Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed

Sensor/Service and Repair/Rear Wheel Speed Sensor Replacement)

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

C0050

DTC C0035, C0040, C0045, or C0050

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 C0035 06

- Left Front Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0035 0F

- Left Front Wheel Speed Sensor Circuit Signal Erratic

DTC C0035 18

- Left Front Wheel Speed Sensor Circuit Low Signal Amplitude

DTC C0035 5A

- Left Front Wheel Speed Sensor Circuit Not Plausible

DTC C0040 06

- Right Front Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0040 0F

- Right Front Wheel Speed Sensor Circuit Signal Erratic

DTC C0040 18

- Right Front Wheel Speed Sensor Circuit Low Signal Amplitude

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DTC P00C9

- Fuel Pressure Regulator High Control Circuit Low Voltage

DTC P00CA

- Fuel Pressure Regulator High Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

High pressure fuel is regulated by the high pressure fuel pump actuator, which is a part of the high pressure fuel pump. The high pressure fuel pump

actuator is a solenoid valve. The ECM provides battery voltage on the actuator high control circuit and ground on the actuator low control circuit.

Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control

circuit driver energizes the high pressure fuel pump actuator and the low control circuit driver pulse-width modulates (PWM) the low control circuit

to ground. The ECM monitors the voltage on the circuits to detect a failure.

Conditions for Running the DTC

* The ignition voltage is between 11-18 V.

* The DTCs run continuously within the enabling conditions.

Conditions for Setting the DTC

P0090

* The ECM detects an open circuit in the high pressure fuel pump actuator low control circuit.

* The DTC sets when the above condition is present for 4 s.

P0091

* The ECM detects a short to ground in the high pressure fuel pump actuator low control circuit.

* The DTC sets when the above condition is present for 4 s.

P0092

* The ECM detects a short to voltage in the high pressure fuel pump actuator low control circuit.

* The DTC sets when the above condition is present for 4 s.

P00C8

* The ECM detects an open circuit in the high pressure fuel pump actuator high control circuit.

* The DTC sets when the above condition is present for 4 s.

P00C9

* The ECM detects a short to ground in the high pressure fuel pump actuator high control circuit.

* The DTC sets when the above condition is present for 4 s.

P00CA

* The ECM detects a short to voltage in the high pressure fuel pump actuator high control circuit.

* The DTC sets when the above condition is present for 4 s.

Action Taken When the DTC Sets

* DTCs P0090, P0091, P0092, P00C8, P00C9, and P00CA are Type A DTCs.

* A message center or an indicator displays Reduced Engine Power.

Conditions for Clearing the DTC

DTCs P0090, P0091, P0092, P00C8, P00C9, and P00CA are Type A DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics (LAU) (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/Connector End Views By Name)

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Conditions for Clearing the DTC

* The current DTC will clear and set the code to history 3 seconds after the reference voltage returns to normal operating range and the ignition

is cycled OFF then back to ACC or RUN.

* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Heated/Cooled Seat Schematics (See: Body and Frame/Seats/Seat Temperature Element/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Heated/Vented Seat Description and Operation (See: Body and Frame/Seats/Seat Temperature Element/Description and Operation/Heated/Vented

Seat)

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 Testing

1. Ignition OFF, disconnect the harness connector at the appropriate E14B or E14D seat cushion heating element.

2. Test for less than 10 Ohms between the low reference circuit terminal D and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit test normal, replace the K40 seat

memory control module.

3. Ignition ON, press a power seat switch in order to wake up the module. Test for 4.8 - 5.2 V between the signal circuit terminal C and ground.

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 K40 seat memory control 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 K40 seat memory

control module.

4. If all circuits test normal, test or replace the E14 seat cushion heating element.

Component Testing

E14B or E14D Seat Cushion Heating Element

1. Ignition OFF, disconnect the harness connector at the appropriate E14B or E14D seat cushion heating element.

2. Test for 500 Ohms - 300 kOhms between the signal circuit terminal C and the low reference circuit terminal D.

瀚慖f not within the specified range, replace the E14 seat cushion heating element.

Repair Instructions

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

* Driver or Passenger Seat Cushion Heater Replacement (See: Body and Frame/Seats/Seat Temperature Element/Service and Repair/Driver or

Passenger Seat Cushion Heater Replacement)

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

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瀚慖f any listed DTC is present, perform the Multi-Axis Acceleration Sensor Module Programming and Setup (See: Brakes and Traction

Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Testing and Inspection/Multi-Axis Acceleration Sensor Module

Programming and Setup) and the Vehicle Yaw Sensor Learn (See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Yaw Rate Sensor/Testing and Inspection/Vehicle Yaw Sensor Learn).

3. Inspect the B119 Multi-axis Acceleration Sensor for correct installation.

瀚慖f loose or incorrect installation is diagnosed, correct the installation of the component and perform the Vehicle Yaw Sensor Learn (See:

Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Testing and Inspection/Vehicle Yaw Sensor

Learn).

4. Ignition OFF, disconnect the harness connector at the B119 Multi-axis Acceleration Sensor.

5. 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 ground circuit terminal 6 and ground.

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

6. Ignition ON, test for greater than 10 V between the 12 V reference circuit terminal 5 and ground.

瀚慖f less than the specified value, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K17 Electronic Brake Control Module (EBCM).

7. If all circuits test normal, replace the B119 Multi-axis Acceleration Sensor and verify the DTC does not reset.

瀚慖f the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests)

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

/ Traction Control Systems/Yaw Rate Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM or Multi-axis Acceleration Sensor

replacement, programming and setup

C0267

DTC C0267

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 C0267 00

- Low Brake Fluid Indicated

Diagnostic Fault Information

Circuit/System Description

The instrument cluster turns ON the brake warning indicator for 5 seconds after ignition ON as a test of the indicator warning lamps. When the

fluid within the brake fluid reservoir is low, contacts within the sensor closes causing the voltage within the sensor signal circuit to drop. The

electronic brake control module (EBCM) will detect the voltage drop and will send a serial data message to the instrument cluster commanding the

brake warning indicator to illuminate.

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B3205 00, B3210 00

The BCM has detected that the compatibility code stored in the affected window motor does not match the compatibility code stored in the BCM.

B3205 39, B3210 39, B3215 39, B3220 39

An internal malfunction has been detected by the BCM in the power window motor while commanding the window UP or DOWN.

B3205 42, B3210 42

The BCM will automatically attempt to download the calibration program into the appropriate window motor (As will occur when the window

motor has been replaced), if the first calibration program fails to load, the BCM will attempt to download the calibration program a second time. If

this download fails, the BCM will set appropriate DTC.

B3205 4B, B3210 4B

The BCM detects that a window motor is "not normalized" which will occur under the following conditions:

* When the battery has been disconnected

* When the battery has been replaced

* When the door wiring harness has been disconnected

* When the window motor has been disconnected.

Action Taken When the DTC Sets

B3205 00, B3205 39, B3205 42, B3210 00, B3210 39, B3210 42, B3215 39, B3220 39

The affected motor will be inoperative.

B3205 4B, B3210 4B

The affected motor will not perform the express up or express down functions and the driver information center will display Open, then Close

Driver Window or will display Open, then Close Passenger Window.

Conditions for Clearing the DTC

B3205 00, B3210 00

Installing a compatible window motor for that specific make and model vehicle.

B3205 39, B3210 39, B3215 39, B3220 39

If the DTC is current, the appropriate window motor must be replaced before the DTC can be cleared.

B3205 42, B3210 42

The appropriate window motor must be replaced before the DTC can be cleared.

B3205 4B, B3210 4B

The appropriate window motor must be normalized before the DTC can be cleared.

Reference Information

Schematic Reference

Moveable Window Schematics (See: Windows and Glass/Windows/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Power Windows Description and Operation (See: Windows and Glass/Windows/Description and Operation/Power Windows)

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

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The EBCM disables the hill start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.

* The EBCM will turn OFF the indicator in the next ignition cycle.

Diagnostic Aids

DTC C0186 and C0287 may set after replacing the Multi-Axis Acceleration Sensor if the sensor is not configured and setup. Perform the

Multi-Axis Acceleration Sensor Module Programming and Setup (See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Yaw Rate Sensor/Testing and Inspection/Multi-Axis Acceleration Sensor Module Programming and Setup) and the Vehicle Yaw Sensor

Learn (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Testing and Inspection/Vehicle Yaw

Sensor Learn) procedures to complete the configuration and setup.

Reference Information

Schematic Reference

Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

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

Circuit/System Testing

1. Ignition ON, verify that DTC C0800 is not present.

瀚慖f DTC C0800 is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

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

2. Verify that DTC C0186 5A, C0196 00, C0196 5A, C019B 5A, C0287 4B, and C0287 5A is not present.

瀚慖f any listed DTC is present, perform the Multi-Axis Acceleration Sensor Module Programming and Setup (See: Brakes and Traction

Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Testing and Inspection/Multi-Axis Acceleration Sensor Module

Programming and Setup) and the Vehicle Yaw Sensor Learn (See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Yaw Rate Sensor/Testing and Inspection/Vehicle Yaw Sensor Learn).

3. Inspect the B119 Multi-axis Acceleration Sensor for correct installation.

瀚慖f loose or incorrect installation is diagnosed, correct the installation of the component and perform the Vehicle Yaw Sensor Learn (See:

Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Testing and Inspection/Vehicle Yaw Sensor

Learn).

4. Ignition OFF, disconnect the harness connector at the B119 Multi-axis Acceleration Sensor.

5. 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 ground circuit terminal 6 and ground.

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

6. Ignition ON, test for greater than 10 V between the 12 V reference circuit terminal 5 and ground.

瀚慖f less than the specified value, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

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2. Start the engine.

3. Verify the DTC does not reset.

P052B

DTC P052B, P052D, P054B, or P054D

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 P052B

- Cold Start Intake Camshaft Position System Performance Bank 1 - Retarded

DTC P052D

- Cold Start Intake Camshaft Position System Performance Bank 2 - Retarded

DTC P054B

- Cold Start Exhaust Camshaft Position System Performance Bank 1 - Retarded

DTC P054D

- Cold Start Exhaust Camshaft Position System Performance Bank 2 - Retarded

Circuit/System Description

The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is

operating. The camshaft position actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the camshaft position

actuator solenoid duty cycle by controlling the amount of solenoid ON time. The camshaft position actuator solenoid controls the advance or the

retard of each camshaft. The camshaft position actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.

Conditions for Running the DTC

* Before the ECM can report DTC P052B, P052D, P054B, or P054D failed, DTCs P0010, P0013, P0020, P0023, P0341, P0342, P0343,

P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 must

run and pass.

* DTC P0010, P0013, P0016, P0017, P0018, P0019, P0020, P0023, P0335, P0336, P0338, P2088, P2089, P2090, P2091, P2092, P2093,

P2094, and P2095 is not set.

* The engine speed is greater than 560 RPM.

* The engine is operating for greater than 1 s.

* The engine coolant temperature is between -48 to +143掳C (-54 to +289掳F).

* The engine oil temperature is between -48 to +180掳C (-54 to +356掳F).

* The engine must accelerate such that the camshaft position actuator system is commanded from the park position to the phased position. This

is considered a cam control cycle. There must be a minimum of 2 cam control cycles for at least 2.5 s each in the phased position.

* DTCs P052B, P052D, P054B, and P054D run continuously once the above conditions are met for greater than 20 s.

Conditions for Setting the DTC

* The ECM detects the difference between the desired camshaft position angle and the actual camshaft position angle is greater than 6 degrees.

* The condition exists for greater than 1 s or for a cumulative of 4 s.

Action Taken When the DTC Sets

DTCs P052B, P052D, P054B, and P054D are type B DTCs.

Conditions for Clearing the DTC

DTCs P052B, P052D, P054B, and P054D are type B DTCs.

Reference Information

Schematic Reference

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

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2010 Cadillac Truck SRX AWD V6-3.0L Page 300

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

* Headlamp Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement)

* 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 headlamp control module replacement, setup

and programming

B257B

DTC B1405, B1529, or B257B

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 B1405 02

- Control Module Voltage Reference Output 2 Circuit Short to Ground

DTC B1405 03

- Control Module Voltage Reference Output 2 Circuit Low Voltage

DTC B1405 07

- Control Module Voltage Reference Output 2 Circuit High Voltage

DTC B1529 03

- Control Module Voltage Reference Output 5 Circuit Low Voltage

DTC B1529 07

- Control Module Voltage Reference Output 5 Circuit High Voltage

DTC B257B 03

- Lighting Control Switch Signal Low Voltage

DTC B257B 07

- Lighting Control Switch Signal High Voltage

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) supplies battery positive voltage to the backlight dimmer switch, which is part of the headlamp switch. When the

backlight dimmer switch is placed in a desired brightness position, reference voltage is applied to the BCM. The BCM interprets this voltage signal,

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2010 Cadillac Truck SRX AWD V6-3.0L Page 651

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

Description and Operation

Power Windows Description and Operation (See: Windows and Glass/Windows/Description and Operation/Power Windows)

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

B3205 00, B3205 39, B3205 42, B3210 00, B3210 39, B3210 42, B3215 39, B3220 39

1. Ignition ON, command the M74 window motor UP and DOWN with a scan tool. The M74 window motor should perform the UP and

DOWN functions.

Note: If the window performs the UP and DOWN functions, clear the DTC

2. Replace the M74 window motor with a M74 window motor compatible for that specific make and model vehicle.

Circuit/System Testing

B3205 4B, B3210 4B

1. Ignition ON, starting with the window completely UP, press and hold the appropriate power window switch until the window is fully open

and continue holding the switch down for approximately 5 seconds after the window is completely open.

2. Pull the power window switch up until the window is fully closed and continue holding the switch up for approximately 5 seconds after the

window is completely closed.

3. Command the window to express UP and express DOWN by pressing the window switch past the first detent and releasing and then pulling

the window switch past the first detent and releasing. The window should perform the express UP and express DOWN functions.

瀚慖f the M74 window motor does not perform as specified and the DTC resets, replace the M74 window motor.

Repair Instructions

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

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

Regulator Replacement)

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

Regulator Motor Replacement)

B3215

DTC B3205, B3210, B3215, or B3220

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 B3205 00

- Driver Window Motor Circuit

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Scan Tool Reference

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the Q46 Air Conditioning Compressor Valve.

2. Ignition ON, verify that a test lamp illuminates between the B+ circuit 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. If the circuit tests normal and the

FRT HVAC Fuse circuit open, test or replace the Q46 Air Conditioning Compressor Valve.

3. Verify that a test lamp does not illuminate between the B+ circuit terminal 2 and the control circuit terminal 1.

瀚慖f the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the K33 HVAC Control

Module.

4. Remove the test lamp.

5. Command the A/C compressor ON with a scan tool. Verify the scan tool A/C Compressor Refrigerant Solenoid Valve Command parameter

is 100%.

瀚慖f not the specified value, test the control circuit for a short to voltage. If the circuit tests normal, replace the K33 HVAC Control Module.

6. If all circuits test normal, test or replace the Q46 Air Conditioning Compressor Valve.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the Q46 Air Conditioning Compressor Valve.

2. Test for 7-15 ohm between B+ circuit terminal 2 and control circuit terminal 1.

瀚慖f not within the specified range, replace the Q46 Air Conditioning Compressor Valve.

3. Test for infinite resistance between each terminal and the Q46 Air Conditioning Compressor Valve housing/case.

瀚慖f not the specified value, replace the Q46 Air Conditioning Compressor Valve.

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

P0532

DTC P0532 or P0533

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 P0532 00

- Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage

DTC P0533 00

- Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage

Circuit/System Description

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1296

Circuit/System Description

The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC)

control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the

oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil

pan. The transmission fluid temperature sensor is located in the control solenoid valve assembly.

Conditions for Running the DTC

* The ignition voltage is between 10.2-15.5 V.

* The engine speed is greater than 400 RPM for 2 s.

* The transmission is not in emergency mode.

* Transmission control module (TCM) communication is normal.

Conditions for Setting the DTC

* Vehicle speed less than 180 km/h (112 MPH) and transmission fluid temperature more than 150掳C (302掳F) for more than 10 s.

* Vehicle speed more than 180 km/h (112 MPH) and transmission fluid temperature more than 150掳C (302掳F) for more than 60 s.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1044

5. Test for 2.6-4.6 V between the control circuit terminal 2 and ground.

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

6. If all circuits test normal, test or replace the Q40 turbocharger bypass solenoid valve.

Component Testing

1. Ignition OFF, disconnect the harness connector at the Q40 turbocharger bypass solenoid valve.

2. Test for 12-60 ohm between the control terminal 2 and the ignition terminal 1 of the Q40 turbocharger bypass solenoid valve.

瀚慖f not within the specified range, replace the Q40 turbocharger bypass solenoid valve.

3. Test for infinite resistance between each terminal and the Q40 turbocharger bypass solenoid valve housing.

瀚慖f not the specified value, replace the Q40 turbocharger bypass solenoid valve.

Repair Instructions

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

* Turbocharger Disassemble ()

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

programming

P0035

DTC P0033-P0035

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 P0033

- Turbocharger Bypass Solenoid Valve Control Circuit

DTC P0034

- Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage

DTC P0035

- Turbocharger Bypass Solenoid Valve Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The turbocharger bypass solenoid valve is used to prevent the turbo from exceeding the pump limit at low flow and high pressure. This occurs

when the engine is running with a load and the throttle suddenly closes. In this case, flow is almost null and pressure is very high. This not only is

damaging to the turbocharger, but also generates noise and decelerates turbine speed. Ignition voltage is supplied directly to the bypass solenoid

valve and the engine control module (ECM) controls the valve by grounding the control circuit with a solid state device called a driver. The driver

is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1253

Scan Tool Reference

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

Circuit/System Verification

1. Observe the scan tool DTC information, verify DTC P0627, P0628, P0629, P069E or U0109 is not set.

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

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

2. Engine idling, observe the scan tool Fuel Rail Pressure Sensor parameter. The pressure should be approximately 1.9-2.1 Mpa (279-305 psi).

3. Engine idling, the scan tool Fuel Rail Pressure Sensor should be close to the scan tool Desired Fuel Rail Pressure. As the engine speed

increases, the Desired Fuel Rail Pressure and the Fuel Rail Pressure Sensor should closely match each other.

4. Move related harnesses/connectors of the B47 fuel rail fuel pressure sensor and verify the engine does not stumble, stall, or change engine

speed.

瀚慖f the engine stumbles, stalls, or changes engine speed, test or repair the suspected harness or connection.

5. Observe the DTC information with a scan tool, DTC P0191 should not set.

6. 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 multi-way harness connector X198 at the rear of the intake manifold.

2. Remove the fuse that supplies B+ to terminal 52-X1 of the K20 ECM.

Note: Testing for steps 3 through 7 is performed on the ECM side of the multi-way harness connector.

3. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal 5 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. Install the fuse that supplies B+ to terminal 52-X1 of the K20 ECM.

5. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 11 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.

6. Ignition ON, verify the scan tool Fuel Rail Pressure Sensor voltage parameter is less than 0.02 V.

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

7. Connect a 3 A fused jumper wire between the signal circuit terminal 12 and the 5 V reference circuit terminal 11. Verify the scan tool Fuel

Rail Pressure Sensor Voltage parameter is greater than 4.96 V.

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

the K20 ECM.

8. Ignition OFF, remove the intake manifold.

9. Connect the multi-way harness connector X198.

Note: Testing for steps 12 through 16 are performed at the fuel rail fuel pressure sensor connector.

10. Disconnect the B47 fuel rail fuel pressure sensor connector.

11. Remove the fuse that supplies B+ to terminal 52-X1 of the K20 ECM.

12. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal C and ground.

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

13. Install the fuse that supplies B+ to terminal 52-X1 of the K20 ECM.

14. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal A 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.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage.

15. Ignition ON, verify the scan tool Fuel Rail Pressure Sensor voltage parameter is less than 0.02 V.

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P2135

* DTCs P0121, P0122, P0123, P0222, P0223, or P06A3 are not set.

* The ignition is ON, or the engine is running.

* The engine is not operating in reduced power mode.

* The ignition voltage is greater than 6 V.

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

Conditions for Setting the DTC

P0121

The ECM detects that the TP sensor 1 voltage is stuck in range for less than 1 s.

P0122

The ECM detects that the TP sensor 1 voltage is less than 0.3 V for less than 1 s.

P0123

The ECM detects that the TP sensor 1 voltage is greater than 4.8 V for less than 1 s.

P0222

The ECM detects that the TP sensor 2 voltage is less than 0.3 V for less than 1 s.

P0223

The ECM detects that the TP sensor 2 voltage is greater than 4.6 V for less than 1 s.

P2135

The ECM detects that TP sensor 1 and TP sensor 2 disagree greater than 7-10 percent for less than 1 s.

Action Taken When the DTC Sets

P0121

* DTC P0121 is a type B DTC

* The ECM commands the throttle actuator control (TAC) system to operate in a Reduced Engine Power mode.

P0122, P0123, P0222, P0223, or P2135

* DTC P0122, P0123, P0222, P0223, and P2135 are type A DTCs

* The ECM commands the throttle actuator control (TAC) system to operate in a Reduced Engine Power mode.

Conditions for Clearing the DTC

* DTC P0121 is a type B DTC.

* DTCs P0122, P0123, P0222, P0223 and P2135 is a type A DTC.

Diagnostic Aids

A high resistance condition on the throttle position and throttle actuator control circuits could cause a DTC to set.

Reference Information

Schematic Reference

Engine Controls Schematics (LAU) (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/Connector End Views By Name)

Description and Operation

Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and

Operation/Throttle Actuator Control (TAC) System Description)

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

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2010 Cadillac Truck SRX AWD V6-3.0L Page 62

An incorrectly installed CPA or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors

and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure that the shorting bars are not causing the circuits to be shorted together. Shorting

bars locations are listed below:

* Inline connectors - on the seat belt anchor pretensioner side of the harness connector

* Harness side of the SDM connector

Terminal fretting, an incorrectly installed CPA, or incorrectly seated connector can cause an open/high resistance condition. Check the circuit

terminals for fretting, incorrectly installed CPAs, or incorrectly seated connectors if a DTC with symptom byte 04 or 0D is set.

If the seat belt anchor pretensioner has deployed under unexpected conditions and/or DTC with symptom byte 01 is set, check both control circuits

for a short to voltage.

Reference Information

Schematic Reference

SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)

Connector End View Reference

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

Description and Operation

SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation/SIR System)

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

Refer to SIR Service Precautions (See: Restraints and Safety Systems/Air Bag Systems/Service Precautions/Technician Safety Information).

Note: Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or

replacement of the affected component/connector.

* Seat belt anchor pretensioner

* SDM

* Seat belt anchor pretensioner 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. Observe the scan tool Deployment Loop Resistance parameters. The reading should be between 2.1 and 4.0 ohm.

瀚慖f not within the specified range, refer to Circuit/System Testing.

2. Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading

should stay consistently between 2.1 and 4.0 ohm without any drop outs or spikes.

* F113 Seat belt anchor pretensioner

* Any harness inline

* K36 SDM

瀚慖f the reading is erratic while moving the harness, perform the following:

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2010 Cadillac Truck SRX AWD V6-3.0L Page 378

At least one control output (of four possible outputs) of the appropriate stepper motor is shorted to ground or open when motor starts moving.

Faults are not detected when motor is already running or target position is already reached.

Action Taken When the DTC Sets

B023A 02

* The affected output will be switched off for hardware protection.

* All stepper motors are deactivated.

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

* The affected output will be switched off for hardware protection.

* The affected stepper motor is deactivated.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

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

Connector End View Reference

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

Description and Operation

Automatic HVAC Description and Operation (See: Heating and Air Conditioning/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. Verify that DTC B023A 02 is not present.

瀚慖f DTC is present, refer to Actuator Power Supply Malfunction.

2. Verify that DTC B0223, B022A, B0233, B0408 or B0418 is not set.

瀚慖f DTC is present, refer to Actuator Malfunction.

Circuit/System Testing

Actuator Power Supply Malfunction

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

2. Ignition ON, verify that a test lamp illuminates between the 12 volt referance circuit terminal 2 and ground.

瀚慖f the test lamp does not illuminate, test the 12 volt referance circuit for a short to ground or an open/high resistance. If the circuit tests

normal test or replace the K33 HVAC control module.

Actuator Malfunction

1. Ignition OFF, disconnect the X3 and X4 harness connector at the K33 HVAC Control Module.

2. Ignition ON, test for 80-200 ohm between the 12 V reference voltage circuit terminal 15 X3 and each control circuit terminal of the

appropriate actuator.

瀚慖f less than the specified range, test for the 12 V reference voltage circuit and the control circuit for a short circuit. If the circuits test

normal, replace the appropriate actuator.

瀚慖f greater than the specified range, test the 12 V reference voltage circuit and the control circuit for an open/high resistance. If the circuits

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1385

DTC P0302

- Cylinder 2 Misfire Detected

DTC P0303

- Cylinder 3 Misfire Detected

DTC P0304

- Cylinder 4 Misfire Detected

DTC P0305

- Cylinder 5 Misfire Detected

DTC P0306

- Cylinder 6 Misfire Detected

Circuit/System Description

The engine control module (ECM) uses information from the crankshaft position sensor and the camshaft position sensors in order to determine

when an engine misfire is occurring. By monitoring variations in the crankshaft rotation speed for each cylinder, the ECM is able to detect

individual misfire events. A misfire rate that is high enough can cause 3-way catalytic converter damage. The malfunction indicator lamp (MIL)

will flash ON and OFF when the conditions for catalytic converter damage are present. DTCs P0301 through P0306 correspond to cylinders 1

through 6. If the ECM is able to determine that a specific cylinder is misfiring, the DTC for that cylinder will set, and the corresponding fuel

injector is disabled. The ECM will re-enable the fuel injector after 4 crankshaft revolutions when the misfire is not current. The ECM will re-enable

the fuel injector after 8 crankshaft revolutions when the misfire is not current, if the vehicle is equipped with a manual transmission.

Conditions for Running the DTC

* DTC P0010, P0011, P0013, P0014, P0016, P0017, P0018, P0019, P0020, P0021, P0023, P0024, P0068, P0101, P0102, P0103, P0106,

P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0335, P0336, P0606, P0641, P0651,

P1516, P2101, P2122, P2123, P2127, P2128 or P2176 is not set.

* The engine speed is between 450-6,600 RPM.

* The evaporative emissions (EVAP) leak detection is not active.

* The delivered torque signal is greater than 5 % at idle.

* The delivered torque signal is between 6-29 % with the transmission in drive.

* The engine coolant temperature (ECT) is between -7 and +127掳C (+19 and +261掳F).

* The ECM is not receiving a rough road signal.

* The fuel level is greater than 11 %.

* The antilock brake system (ABS) and the traction control system (TCS) are not active or detecting rough road.

* Torque Converter Clutch (TCC) is not applied/active.

* The ECM is not in fuel cut-off or decel fuel cut-off mode.

* DTCs P0300 through P0306 run continuously when the above conditions exist for greater than 1,000 engine revolutions. 200 revolutions

after the first failure.

Conditions for Setting the DTC

P0300

The ECM detects a crankshaft rotation speed variation indicating a misfire rate sufficient to cause emissions levels to exceed a predetermined value.

P0301, P0302, P0303, P0304, P0305, P0306

The ECM detects a crankshaft rotation speed variation indicating a single cylinder misfire rate sufficient to cause emissions levels to exceed

mandated standards.

Action Taken When the DTC Sets

* DTCs P0300-P0306 are Type B DTCs.

* The ECM disables the fuel injector of the misfiring cylinder when a misfire is present.

Conditions for Clearing the DTC

DTCs P0300-P0306 are Type B DTCs.

Diagnostic Aids

* A misfire DTC could be caused by an excessive vibration from sources other than the engine. Inspect for the following possible sources:

- A tire or wheel that is out of round or out of balance

- Variable thickness brake rotors

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2010 Cadillac Truck SRX AWD V6-3.0L Page 813

Connector End View Reference

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

Description and Operation

Brake Assist System Description and Operation (See: Brakes and Traction Control/Hydraulic System/Description and Operation/Brake Assist

System)

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)

Circuit/System Testing

1. Ignition ON, verify that DTC C1100 is not present.

瀚慖f DTC C1100 is present, refer to DTC C1100 (See: C Code Charts/C1100).

2. Inspect the brake booster vacuum system for damage, leakage and correct installation. Refer to Brake Assist System Diagnosis (See: Brakes

and Traction Control/Hydraulic System/Testing and Inspection/Component Tests and General Diagnostics/Brake Assist System Diagnosis).

3. If the brake booster vacuum systems diagnoses normal, replace the B19B Brake Booster Vacuum Sensor and verify the DTC does not reset.

If the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests)

* Power Brake Booster Vacuum Sensor Replacement (See: Brakes and Traction Control/Power Brake Assist/Brake Booster Vacuum

Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning)

C0393

DTC C0393

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 C0393 0B

- Rear Axle Coupling Solenoid Valve Control Circuit High Current

Diagnostic Fault Information

Circuit/System Description

The rear differential clutch solenoid valve is mounted on the rear of the differential housing. The rear differential clutch control module supplies

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2010 Cadillac Truck SRX AWD V6-3.0L Page 836

Conditions for Clearing the DTC

C0574 02 and C0574 04

* The condition for setting the DTC is no longer present.

* The circuit is not tested unless the ignition is cycled.

C0574 13 and C0574 14

* The temperature is within the limit for more than 30 s.

* The circuit is tested with a frequency of 50 Hz.

Diagnostic Aids

C0574 13 and C0574 14

The DTCs C0574 13 and C0574 14 indicate that the rear differential clutch control module temperature is out of range. This is a temporary fault.

The rear differential clutch control module is protected against running during critical temperatures. As soon as the temperature reaches normal

values the actual DTC is cleared.

Reference Information

Schematic Reference

Rear Axle Schematics (See: Transmission and Drivetrain/Differential Assembly/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Rear Drive Axle Description and Operation (See: Transmission and Drivetrain/Differential Assembly/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 ON, observe the scan tool Rear Differential Clutch Control Module Temperature parameter. The scan tool should display be between -40掳

C (-40掳F) and 115掳C (239掳F) when stationary.

Circuit/System Testing

Important: The rear drive clutch solenoid valve is calibrated with and is part of the rear differential clutch control module. Both

components must be replaced as a matched set.

C0574 02 and 0574 04

Ignition ON. Verify that DTC C0574 02 or 0574 04 is not set.

If a DTC is set, replace the K47 rear differential clutch control module.

C0574 13 and 0574 14

1. Ignition OFF, allow the housing and the K47 rear differential clutch control module temperature to adjust to within 0-40掳C (32-104掳F).

2. Ignition ON, verify that DTC C0574 13 or C0574 14 is not set.

If a DTC is set, replace the K47 rear differential clutch control module.

Repair Instructions

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

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2010 Cadillac Truck SRX AWD V6-3.0L Page 282

DTC B251E 04

- Right Rear Door Unlatch High Control Circuit Open

Diagnostic Fault Information

Circuit/System Description

The system is designed so that when the operator approaches a locked vehicle with the keyless entry transmitter, the keyless entry control module

will detect the keyless entry transmitter and when an exterior door handle is pulled the keyless entry control module will command all doors to

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

Conditions for Running the DTC

The system voltage is 9-16 V.

Conditions for Setting the DTC

B251A 01

The keyless entry control module detects a short to voltage on the passenger or left rear or right rear door latch motor unlatch low control circuit.

B251A 02

The keyless entry control module detects a short to ground on the passenger or left rear or right rear door latch motor unlatch low control circuit.

B251A 02

The BCM detects a short to ground on the passenger door lock actuator unlock control circuit.

B251B 04

The keyless entry control module detects an open/high resistance in the driver door latch motor unlatch control circuit.

B251B 02

The BCM detects a short to ground on the driver door lock actuator unlock control circuit

B251C 04

The keyless entry control module detects an open/high resistance on the passenger door latch motor unlatch control circuit.

B251D 04

The keyless entry control module detects an open/high resistance on the left rear door latch motor unlatch control circuit.

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1. Ignition OFF, disconnect the KR25 secondary air injection pump relay.

2. Test for 70-110 ohm between terminals 85 and 86.

瀚慖f the resistance is not within the specified range, replace the KR25 secondary air injection pump relay.

3. Test for infinite resistance between the following terminals:

* 86 and 87

* 86 and 30

* 85 and 87

* 87 and 30

瀚慖f not the specified value, replace the KR25 secondary air injection pump relay.

4. Install a 20 A fused jumper wire between relay terminal 86 and 12 V. Install a jumper wire between relay terminal 85 and ground. Test for

less than 2 ohm between terminals 87 and 30.

瀚慖f greater than the specified range, replace the KR25 secondary air injection pump 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))

* Secondary Air Injection Pump Replacement (See: Powertrain Management/Emission Control Systems/Air Injection/Air Injection

Pump/Service and Repair)

P0418

DTC P0418, P2257, or P2258

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 P0418

- Secondary Air Injection Pump Control Circuit

DTC P2257

- Secondary Air Injection Pump Relay Control Circuit Low Voltage

DTC P2258

- Secondary Air Injection Pump Relay Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The secondary air injection system aids in the reduction of hydrocarbon emissions during a cold start. The electric air pump forces fresh air into the

exhaust stream in order to accelerate the catalyst operation. Ignition voltage is supplied directly to the secondary air injection pump relay. The

engine control module (ECM) controls the relay by grounding the control circuit with a solid state device called a driver. The driver is equipped

with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a

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Conditions for Running the DTC

P0121

* DTCs P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0335, or P0336 is not set.

* The engine speed is between 400-7,000 RPM.

* The engine coolant temperature (ECT) is between 69-127掳C (156-260掳F).

* The intake air temperature (IAT) is between -20 to +125掳C (-4 to +257掳F).

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

P0122, P0123, P0222, P0223

* DTC P06A3 is not set.

* The ignition is ON, or the engine is running.

* The engine is not operating in reduced power mode.

* The ignition voltage is greater than 6 V.

* The DTCs runs continuously when the above condition are met.

P2135

* DTCs P0121, P0122, P0123, P0222, P0223, or P06A3 are not set.

* The ignition is ON, or the engine is running.

* The engine is not operating in reduced power mode.

* The ignition voltage is greater than 6 V.

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

Conditions for Setting the DTC

P0121

The ECM detects that the TP sensor 1 voltage is stuck in range for less than 1 s.

P0122

The ECM detects that the TP sensor 1 voltage is less than 0.3 V for less than 1 s.

P0123

The ECM detects that the TP sensor 1 voltage is greater than 4.8 V for less than 1 s.

P0222

The ECM detects that the TP sensor 2 voltage is less than 0.3 V for less than 1 s.

P0223

The ECM detects that the TP sensor 2 voltage is greater than 4.6 V for less than 1 s.

P2135

The ECM detects that TP sensor 1 and TP sensor 2 disagree greater than 7-10 percent for less than 1 s.

Action Taken When the DTC Sets

P0121

* DTC P0121 is a type B DTC

* The ECM commands the throttle actuator control (TAC) system to operate in a Reduced Engine Power mode.

P0122, P0123, P0222, P0223, or P2135

* DTC P0122, P0123, P0222, P0223, and P2135 are type A DTCs

* The ECM commands the throttle actuator control (TAC) system to operate in a Reduced Engine Power mode.

Conditions for Clearing the DTC

* DTC P0121 is a type B DTC.

* DTCs P0122, P0123, P0222, P0223 and P2135 is a type A DTC.

Diagnostic Aids

A high resistance condition on the throttle position and throttle actuator control circuits could cause a DTC to set.

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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

Note: All modules must be powered down or misdiagnosis may result.

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 circuits 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 value, 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. Verify none of the following conditions exist:

* Water intrusion in the HO2S harness connector

* Low or high fuel system pressure-Refer to Fuel System Diagnosis (LF1 China) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (China))Fuel System Diagnosis (LF1 Except China) (See:

Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China))Fuel

System Diagnosis (LAU China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel

System Diagnosis (China))Fuel System Diagnosis (LAU Except China) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China)).

* Fuel that is contaminated-Refer to Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool) (See: Powertrain Management/Fuel Delivery

and Air Induction/Fuel/Testing and Inspection/Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool))Alcohol/Contaminants-in-Fuel

Diagnosis (Without Special Tool) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component

Tests and General Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)).

* Fuel saturation of the evaporative emission (EVAP) canister

* Exhaust leaks near the HO2S

* Engine vacuum leaks

瀚慖f any of the above conditions exist, repair as necessary. 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)

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