2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 918

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 918

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

* Transfer Case Two/Four Wheel Drive Actuator Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and

Solenoids - Transmission and Drivetrain/Actuators and Solenoids - Transfer Case/Transfer Case Actuator/Service and Repair/MP 3010-NP0

- Transfer Case/Transfer Case Two/Four Wheel Drive Actuator Replacement)

* Transfer Case Disassemble (See: Transmission and Drivetrain/Transfer Case/Service and Repair/Overhaul/MP 3023/3024-NQH - Transfer

Case/Transfer Case Disassemble)

MP 3010-NP0 - Transfer Case

DTC C0392

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 C0392 01

- Rotational Position Sensor Circuit Short to Battery

DTC C0392 02

- Rotational Position Sensor Circuit Short to Ground

DTC C0392 08

- Rotational Position Sensor Circuit Signal Invalid

Diagnostic Fault Information

Circuit/System Description

The transfer case shift control module (TCCM) receives input from the transfer case two/four wheel drive actuator position sensor, also known as

the rotational position sensor (RPS). The RPS receives a 5-volt reference signal from the TCCM. In return the RPS sends the TCCM a variable

pulse width modulated signal indicating the position of the transfer case actuator. The RPS works in conjunction with the incremental position

sensor, inside the transfer case actuator, to confirm actuator position. The RPS is more sensitive than the incremental position sensor and is able to

indicate to the TCCM the exact position of the transfer case actuator between modes or ranges changes. It is also able to show how much clutch

activation is being commanded at any time.

Conditions for Running the DTC

* Ignition ON.

* System voltage 10.5-18 V.

Conditions for Setting the DTC

C0392 01

The TCCM sees an RPS-PWM voltage that does not constantly change, but remains high, >5.0 V, indicating a short to voltage.

C0392 02

The TCCM sees an RPS-PWM voltage that does not constantly change, but remains low, less than 0.5 V, indicating a short to ground.

C0392 08

* The module does not receive a 5-volt reference of 4.8-5.2 volts.

* The RPS low reference circuit has an open or high resistance causing a low voltage situation.