2010 Cadillac Truck SRX AWD V6-3.0L Page 803

2010 Cadillac Truck SRX AWD V6-3.0L Page 803

DTC Descriptor

DTC C0280 54

- Stability System Active Too Long High Temperature

Circuit/System Description

The solenoid valves are integral parts of the brake pressure modulator valve assembly. The brake pressure modulator valve assembly contains an

isolation solenoid valve and a dump solenoid valve for each wheel and a traction control/stability control supply solenoid valve and isolation

solenoid valve for each brake circuit. The solenoid valves are not engaged during normal system operation. When the ABS, traction control or

stability control operation is required the electronic brake control module (EBCM) turns the required solenoid valves ON.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

Stability control is active for more than 15 s.

Action Taken When the DTC Sets

* The EBCM disables the stability control for the duration of the ignition cycle.

* The traction control/stability control-active indicator turns ON.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Diagnostic Aids

DTC can set because of extended operation of ABS, traction control or stability control.

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) for scan tool information

Circuit/System Testing

1. Ignition ON, verify that DTC C0186, C0196, C019B, or C0710 is not set as a present DTC.

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

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) to diagnose that DTC prior to this diagnostic.

2. Ignition OFF, inspect the B99 Steering Wheel Angle Sensor and B119 Multi-axis Acceleration Sensor for correct installation.

瀚慖f loose or incorrect installation is diagnosed, correct the installation of the component.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 796

DTC Descriptor

DTC C0186 5A

- Lateral Acceleration Sensor Circuit Not Plausible

DTC C0186 71

- Lateral Acceleration Sensor Circuit Invalid Data

DTC C0196 00

- Yaw Rate Circuit Malfunction

DTC C0196 5A

- Yaw Rate Signal Not Plausible

DTC C019B 5A

- Yaw Rate Signal Not Plausible

DTC C0287 4B

- Longitudinal Acceleration Sensor Circuit Calibration Not Learned

DTC C0287 5A

- Longitudinal Acceleration Sensor Circuit Not Plausible

DTC C0287 71

- Longitudinal Acceleration Sensor Circuit Invalid Data

Diagnostic Fault Information

Circuit/System Description

The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one multi-axis acceleration sensor, external to the

electronic brake control module (EBCM). The EBCM supplies a 12 V reference voltage to the multi-axis acceleration sensor. The multi-axis

acceleration sensor communicates with the EBCM via the high speed controller area network (CAN) serial data circuit. The EBCM activates the

stability control function depending on multi-axis acceleration sensor input.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

C0186 5A

* The lateral acceleration sensor signal offset is out of specified range.

* The lateral acceleration sensor signal is not plausible with the yaw rate sensor signal, steering angle sensor signal and vehicle speed.

C0186 71

The EBCM received an invalid lateral acceleration sensor signal.

C0196 00

The yaw rate sensor signal is not plausible.

C0196 5A

* The yaw rate sensor offset is out of specified range.

* The yaw rate sensor signal is not plausible with the lateral acceleration sensor signal, steering angle sensor signal and vehicle speed.

C019B 5A

The yaw rate sensor signal is out of specified range.

2010 Cadillac Truck SRX AWD V6-3.0L Page 218

2010 Cadillac Truck SRX AWD V6-3.0L Page 218

DTC Descriptor

DTC B144A 02

- RUN Power Relay Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) controls the ignition 1 relay through the control circuit by applying voltage to the circuit. The ignition 1 relay is

energized when the ignition switch is in ON or START, or when a remote start is requested.

Conditions for Running the DTC

* The system voltage is between 9-16 V.

* The DTC can only run when the output is activated.

Conditions for Setting the DTC

The BCM detects a short to ground in the ignition 1 relay control circuit.

Action Taken When the DTC Sets

The module output driver will be shut down and not supply voltage to the ignition 1 relay control circuit.

Conditions for Clearing the DTC

* The current DTC will clear when the module request for the output is removed or the malfunction is no longer present.

* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.

Diagnostic Aids

Short to voltage in the ignition 1 relay control circuit will cause the malfunction indicator lamp (MIL) to illuminate with the ignition key OFF, and

the engine will remain running if started and the ignition key is removed.

Reference Information

Schematic Reference

* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)

* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System

Diagram/Power Distribution Schematics)

Connector End View Reference

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

Description and Operation

Power Mode Description and Operation (See: Power and Ground Distribution/Description and Operation/Power Mode)

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

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2010 Cadillac Truck SRX AWD V6-3.0L Page 819

DTC Descriptor

DTC C0406 0B

- Transfer Case Solenoid Valve Control Circuit High Current

Diagnostic Fault Information

Circuit/System Description

The rear drive clutch solenoid valve is internal to the torque transfer device housing. The rear differential clutch control module supplies battery

voltage to the control circuit and ground to the low reference circuit of the solenoid valve. The solenoid valve is controlled by a pulse width

modulation (PWM) signal. The solenoid valve controls the hydraulic pressure to the clutch package of the torque transfer device. The locking level

of the torque transfer device depends on the engagement of the clutch package.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

* The rear differential clutch control module detects a short to ground on the control circuit of the rear drive clutch solenoid valve.

* The rear differential clutch control module detects a current more than 11 A on the control circuit of the rear drive clutch solenoid valve.

Action Taken When the DTC Sets

One or more of the following actions may occur:

* All-wheel drive (AWD) is disabled.

* Service Rear Axle is displayed on the driver information center.

Conditions for Clearing the DTC

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

* The DTC is not detected in 40 consecutive ignition cycles.

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

Engine running, observe the scan tool Rear Drive Clutch Status parameter. The scan tool should display TEMPORARILY LIMITED when

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2010 Cadillac Truck SRX AWD V6-3.0L Page 348

DTC Descriptor

DTC B324A 02

- Rear Cargo Door Unlock Motor Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

When the body control module receives a liftgate release command, it will provide voltage to one side of the relay and ground to the other side of

the relay. This will energize the relay causing the switch side of the relay to close and will then provide B+ voltage to the liftgate latch.

Conditions for Running the DTC

* The system voltage is 9-16 volts.

* When the relay is actively commanded by the BCM

Conditions for Setting the DTC

The BCM detects a short to ground in the RR CLOSURE relay control circuit.

Actions Taken When DTC Sets

The liftgate latch will malfunction.

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.

* When the fault is no longer present, the DTC will be a history DTC.

* A history DTC will clear after 50 ignition cycles.

Reference Information

Schematic Reference

Liftgate Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Liftgate Schematics)

Connector End View Reference

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

Description and Operation

Rear Hatch/Gate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Description and Operation/Rear

Hatch/Gate)

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

Doors UNLOCKED, command the M31 liftgate latch assembly to release by pressing the S58A rear compartment lid release switch - exterior. The

M31 liftgate latch assembly should release the liftgate.

Circuit/System Testing

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2010 Cadillac Truck SRX AWD V6-3.0L Page 430

DTC Descriptor

DTC B1020 00

- Auxiliary Electronic Control Unit (ECU) Performance

Circuit/System Description

The radio communicates with the radio/HVAC control via serial data. This DTC indicates a fault in the radio/HVAC control. No external circuits

are involved. The radio may continue to respond normally to faceplate functions when this DTC is set.

Conditions for Running the DTC

* Ignition is ON or in the ACC position.

* The system voltage is at least 9.5 V and no more than 15.5 V.

* All the above conditions are present for greater than 10 seconds.

Conditions for Setting the DTC

The radio receives an improper status response indicating an internal ECU fault in the radio/HVAC control.

Action Taken when the DTC Sets

No action is taken.

Conditions for Clearing the DTC

* A current DTC clears when the radio receives a proper status response message back from the radio control assembly.

* A history DTC clears after 50 malfunction-free ignition cycles.

Diagnostic Aids

* This DTC may be stored as a history DTC without affecting the operation of the radio/HVAC control.

* If stored only as a history DTC and not retrieved as a current DTC, do not replace the radio/HVAC control.

* If this DTC is retrieved as both a current and history DTC, replace the radio/HVAC control.

Reference Information

Schematic Reference

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

Schematics)

Connector End View Reference

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

Description and Operation

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

If this DTC is retrieved as a current DTC, replace the radio/HVAC control.

Repair Instructions

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