2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 900

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 900

Conditions for Running the DTC

* Ignition ON.

* System voltage 10.5-18 V.

* DTC C0379 is not set.

* Vehicle speed > 5 kph (3 mph)

Conditions for Setting the DTC

This DTC sets if one of three components: motor driver inside the transfer case shift control module, transfer case clutch, or the shift motor, exceed

the thermal model within the software for the module.

Action Taken When the DTC Sets

* All range and mode changes disabled until thermal model indicates temperature acceptable.

* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.

Conditions for Clearing the DTC

* The TCCM clears the DTC once the conditions for setting the DTC are no longer present.

* A history DTC clears after 40 consecutive warm-up cycles without a fault present.

* History and current DTCs can be cleared using a scan tool.

Diagnostic Aids

* The TCCM provides a reference voltage of 1.25-3.75 V on the motor B circuit for diagnostic purposes.

* It is possible to have windings inside the motor short to the case resulting in a short to ground.

* A problem where the front axle actuator is unable to mechanically engage can cause this DTC to set.

* A worn transfer case clutch can cause this DTC to set.

* A motor brake not holding can cause this DTC to set.

* Faulty wheel speed sensors can cause this DTC to set. When driving at a steady speed, the scan tool should display the same values for the

following data parameters in the electronic brake control module (EBCM):

- Left and right front wheel speed sensors

- Left and right rear wheel speed sensors

Reference Information

Schematic Reference

Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams/MP 3010-NP0 - Transfer Case)

Connector End View Reference

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

Description and Operation

Transfer Case Description and Operation (See: Transmission and Drivetrain/Transfer Case/Description and Operation/MP 3010-NP0/Transfer

Case Description and Operation)

Electrical Information Reference

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

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

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

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

Repairs/Wiring Repairs)

Scan Tool Reference

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

Circuit/System Verification

1. Ignition ON, engine OFF.

2. Install a scan tool.

3. Ensure no other ECBM or TCCM codes are set.

瀚慖f any other EBCM or TCCM DTC's are set, diagnose them first.