2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1520
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Disable the high voltage for servicing at the Drive Motor Generator Control Module Assembly cable connections. Refer to High Voltage
Disabling ().
2. Inspect for damaged 3 phase cables between the drive motor generator power inverter control module (PIM) and the transmission.
锟斤拷If damage is observed, replace the 3 phase cables.
3. Remove the 3 phase cable assembly from the PIM distribution box. Refer to Generator Control Module 3-Phase Cable Assembly
Replacement ().
4. Test the resistance of each phase by measuring between the following circuits with a DMM.
* Phase U and phase V
* Phase U and phase W
锟斤拷If you meaure 0.5 ohms or less replace the drive motor generator assembly and retest for the DTC. If the DTC resets, replace the PIM.
锟斤拷If you measure greater than 0.5 ohms continue with diagnosis.
5. Remove the 3 phase cable assembly cover from the transmission and inspect the 3 phase cable terminal fasteners for the proper torque and for
arc-flash damage. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
锟斤拷If any fasteners were loose and no arc-flash damage is present, torque the fasteners and re-assembly the vehicle. Retest for the DTC.
锟斤拷If any fasteners were loose and arc-flash damage is present, replace the drive motor generator assembly and the 3 phase cable assembly.
6. Disconnect the 3 phase cable assembly from the transmission.
7. Test each cable for continuity from the PIM connection terminal to the transmission connection terminal.
锟斤拷If you measure greater than 0.5 ohms, replace the 3 phase cable assembly.
锟斤拷If you measure 0.5 ohms or less replace the drive motor generator assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
* Generator Control Module 3-Phase Cable Assembly Replacement ().
* 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).
P0C11
DTC P0C11-P0C16
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 P0C11
- Drive Motor 1 Inverter Phase U Overtemperature
