P1AFA

DTC P1AFA

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* 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 8-18 volts.

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.

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 P1AFA.

Circuit/System Testing

1. Ignition OFF, disconnect the 12 V battery.
2. Wait 2 minutes.
3. Reconnect the 12 V battery. Refer to Battery Negative Cable Disconnection and Connection.
4. Ignition ON, retest for DTC P1AFA.

^ 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.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests