2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1573
* DTCs P1A4F, P1A50, P1A51, P1A52, P1A53, P1A54, P1ADC and P1ADD are Type A DTCs.
* The PIM commands the battery energy control module (BECM) to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTCs P1A4F, P1A50, P1A51, P1A52, P1A53, P1A54, P1ADC and P1ADD are Type A DTCs.
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. Clear the DTC information.
2. Ignition OFF for 1 minute.
3. Ignition ON.
4. Retest for DTCs P1A4F, P1A50, P1A51, P1A52, P1A53, P1A54, P1ADC and P1ADD.
Circuit/System Testing
Program the PIM with the latest software version and recheck for DTCs.
If the DTC resets after programming or if the PIM already contains the latest software version, 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 replacement, setup, and programming.
P1AEA
DTC P1AE8, P1AE9, P1AEA, or P1AEB
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 P1AE8
- Drive Motor 1 Control Module Hybrid Battery Voltage Sense Circuit Low Voltage
DTC P1AE9
- Drive Motor 1 Control Module Hybrid Battery Voltage Sense Circuit High Voltage
DTC P1AEA
- Drive Motor 2 Control Module Hybrid Battery Voltage Sense Circuit Low Voltage
DTC P1AEB
- Drive Motor 2 Control Module Hybrid Battery Voltage Sense Circuit High Voltage
Circuit/System Description
The drive motor generator power inverter module (PIM) contains two motor control modules (MCM). Each MCM monitors its internal high
voltage sensor for correct operation.
Conditions for Running the DTC
* Ignition is ON.
* Ignition voltage is 8-18V.
