2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1498
1st Position)
* Drive Motor with Generator Assembly Removal - 2nd Position (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic Transmission/13. Drive Motor with Generator Assembly Removal
- 2nd Position)
P0C1A
DTC P0C1A
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 Descriptor
DTC P0C1A
- Drive Motor 2 Torque Delivered Performance
Circuit/System Description
Each drive motor generator is controlled by a motor control module (MCM). The MCM constantly monitors the requested torque and the delivered
torque of its respective drive motor generator.
Conditions for Running the DTC
* Ignition voltage is 8-18 volts.
* Drive motor generator is commanded to develop torque.
Conditions for Setting the DTC
The MCM has detected that drive motor generator torque is not being delivered as expected.
Action Taken When the DTC Sets
* DTC P0C1A is a Type A DTC.
* The hybrid powertrain control module (HPCM) commands the battery energy control module (BECM) to open the high voltage contactor
relays.
Conditions for Clearing the DTC
DTC P0C1A is a Type A DTC.
Diagnostic Aids
Because the drive axle and drive motor 2 are joined mechanically through a planetary gear set, a drive axle condition that requires drive motor
generator 2 to utilize excessive current while trying to rotate the drive axle may cause this DTC to set.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
1. Inspect for DTCs P0A45, P0A46, P0A79, P0BFE, P0C04, P0C08, P0C0E, P0C18, P0C4F, P0C57, P0C58, P0C61, P0C62, P1AFE, P1B04,
or P1B10.
锟斤拷If the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Clear the DTC information.
3. Turn the ignition OFF for 1 minute.
4. Attempt to start the engine.
