2010 Cadillac Truck Escalade RWD V8-6.2L Page 1498
Failure to follow the procedures exactly as written may result in serious injury or death.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Return circuit for a short to ground between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
P1AE4 with or without P1B05 and P1B06
Important: DTCs P1B05 and P1B06 should always pass and fail together. If one DTC has passed while one has failed, replace the
drive motor generator power inverter control module (PIM).
1. Ignition OFF, wait 2 minutes.
Important: The drive motor generator control module sight shield must be installed during all testing in order to complete the HVIC
current loop.
2. Disconnect PIM connector X1.
3. Ignition ON, test for less than 35 mA with a DMM between the HVIC Source circuit terminal 23 and ground.
瀚慖f more than the specified range, test the HVIC Source circuit for a short to voltage between PIM connector X1 and X350.
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
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.
Important: Removal of the HV manual disconnect lever also opens the HVIC source circuit between X350 and BECM connector X1.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Source circuit for a short to voltage between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
4. Ignition ON, test for less than 35 mA with a DMM between the HVIC Return circuit terminal 1 and ground.
瀚慖f more than the specified range, test the HVIC Return circuit for a short to voltage between PIM connector X1 and X350.
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
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.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Return circuit for a short to voltage between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
5. If all circuits test normal, replace the PIM.
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 or BECM replacement, setup, and programming
