2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 922
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 mode or range 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.
Action Taken When the DTC Sets
Current Mode:
4WD Auto, 4WD HI or 4WD LO
* Clutch torque increased to maximum torque.
* No further mode/range changes allowed.
* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.
2WD HI or Neutral
* No further mode/range changes allowed.
* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.
Mode/Range Shift
* Current mode/range change completed.
* No further mode/range changes allowed.
* 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 DTCs can be cleared using a scan tool.
Diagnostic Aids
* EL-49742 - harness is a good source for B+ and ground.
* The transfer case drain plug is a good source for ground.
* Typical RPS parameter values:
- 2WD HI = 30-40锟斤拷
- 4WD Auto = 95-105锟斤拷
- 4WD HI = 120-135锟斤拷
- 4WD LO = -70-60锟斤拷
- Neutral = -2-2锟斤拷
- Lock Position = 30-38锟斤拷
Reference Information
Schematic Reference
Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams/MP 3023/3024-NQH -
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
