2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1610
* 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 P1AFA
- Drive Motor 1 Control Module Programmable Logic Device Not Programmed
Circuit/System Description
This diagnostic applies to internal microprocessor integrity conditions within the hybrid powertrain control module (HPCM). The HPCM and each
Motor Control Module (MCM) utilize a programmable logic device (PLD) to perform certain input and output functions. MCM 1 programs the
PLD with software at every ignition ON event. MCM 1 verifies that the PLD is programmed successfully.
Conditions for Running the DTC
* The control module runs the program to detect an internal fault when the key is ON.
* Ignition voltage is 8-18V.
Conditions for Setting the DTC
The control module has detected an internal PLD malfunction.
Action Taken When the DTC Sets
* DTC P1AFA is a Type A DTC.
* The HPCM commands the battery energy control module (BECM) to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTC P1AFA 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
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
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 DTC P1AFA.
Circuit/System Testing
1. Ignition OFF.
2. Wait 2 minutes.
3. Disconnect PIM connector X1.
4. Wait 2 minutes.
5. Reconnect the PIM connector X1.
6. Ignition ON, retest for DTC P1AFA.
锟斤拷If 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.
