2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1590
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.
瀚慖f the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Source circuit for an open between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
P1AE3 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, observe the BECM HVIC Source Current parameter. The parameter should display less than 5 mA.
瀚慖f the HVIC Source Current parameter indicates current between 5-18 mA test the HVIC Source circuit for a short to ground 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 ground between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
4. Install a 3A fused jumper wire between the HVIC return circuit terminal 1 and the HVIC Source circuit terminal 23.
5. Observe the BECM HVIC Source Current and HVIC Return Current parameters with the scan tool.
瀚慖f both HVIC Source Current and HVIC Return Current parameters indicate current between 5-18 mA, replace the PIM.
瀚慖f only the HVIC Source Current parameter indicates current between 5-18 mA test the HVIC Return circuit for a short to ground
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 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).
