2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 938

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 938

Conditions for Clearing the DTC

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

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

* History DTCs can be cleared using a scan tool.

Diagnostic Aids

* The incremental position sensor and the rotational position sensor both show position in degrees. Monitor these parameters for erratic or

unreasonable readings.

* A Key ON, engine OFF sequence with transfer case encoder motor removed, but still attached, will cause C0398 5A to set.

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)

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. Key ON, engine OFF.

2. Connect a scan tool.

3. Monitor the IPS and RPS parameters on the scan tool. Using the transfer case shift control switch, shift the transfer case into all modes. The

IPS and RPS parameters should track each other.

Circuit/System Testing

1. If DTC C0392 (RPS) or C0396 (IPS) is set, diagnose it first.

2. Go to Component Testing.

Component Testing

Note: Order of component testing is important.

1. Rotational Position Sensor (RPS)

1. Rotational Position Sensor (RPS)

1. Key OFF. Disconnect the RPS X1 connector. Remove the RPS. Inspect the mating surface for damage. Replace if damage is found.

2. Rotate the RPS sensor tab to the lock position. Reconnect the RPS.

3. Key ON, engine OFF.

4. While monitoring the RPS parameter on the scan tool, push in the locking tab and rotate the RPS sensor tab. In the lock position the RPS

parameter should read 25-45掳. Upon rotating the RPS tab, the RPS parameter should display a sweep from -146 to +204 degrees.

瀚慖f the RPS parameter does not display as described, replace the RPS.

5. Using a wide, flat blade screwdriver in the RPS mounting slot, attempt to rotate the transfer case control actuator shaft. The shaft should

not turn.

瀚慖f the shaft can be turned, then internal damage has occurred to the transfer case control actuator shaft or mating gears. Refer to

transfer case disassemble and inspection, and repair as necessary.

2. Transfer Case Encoder Motor (TCEM) - Incremental Position Sensor