2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1188
The control module has detected an internal HPCM malfunction.
Action Taken When the DTC Sets
DTC P0A1D is a Type A DTC.
Conditions for Clearing the DTC
DTC P0A1D is a Type A DTC.
Diagnostic Aids
An intermittent loss of battery power to the drive motor generator power inverter module assembly (PIM) may set this DTC.
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. Turn the ignition OFF for 1 minute.
3. Turn the ignition ON.
4. Retest for DTC P0A1D.
Circuit/System Testing
1. Inspect for any communication U-code DTCs.
瀚慖f 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. Ignition OFF, disconnect the 12V battery. Refer to Battery Negative Cable Disconnection and Connection (See: Starting and
Charging/Battery/Battery Cable/Negative/Service and Repair/Battery Negative Cable Disconnection and Connection).
3. Wait 2 minutes.
4. Reconnect the 12V battery. Refer to Battery Negative Cable Disconnection and Connection (See: Starting and Charging/Battery/Battery
Cable/Negative/Service and Repair/Battery Negative Cable Disconnection and Connection).
5. Ignition ON, retest for DTC P0A1D.
瀚慖f the DTC resets, 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.
P0A1F
DTC P0A1F, P1A01, P1A05, or P1A06
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 Descriptors
DTC P0A1F
- Battery Energy Control Module Internal Performance
