P1AF4

DTC P1AF4-P1AF7

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 P1AF4
- Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage

DTC P1AF5
- Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage

DTC P1AF6
- Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage

DTC P1AF7
- Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage

Circuit/System Description

This is an internal fault detection of the drive motor generator power inverter module (PIM) assembly. This fault is handled inside the PIM and no external circuits are involved.

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

P1AF4 and P1AF6

The motor control module (MCM) detects isolation sensor voltage less than 4.25 V for 208 milliseconds.

P1AF5 and P1AF7

The motor control module (MCM) detects isolation sensor voltage more than 400 V for 208 milliseconds.

Action Taken When the DTC Sets

* DTCs P1AF4, P1AF5, P1AF6 and P1AF7 are Type B DTCs.
* The hybrid powertrain control module (HPCM) commands the battery energy control module (BECM) to open the high voltage contactor relays.

Conditions for Clearing the DTC

DTCs P1AF4, P1AF5, P1AF6 and P1AF7 are Type B DTCs.

Circuit/System Verification

1. Clear the DTC information.
2. Turn the ignition OFF for 1 minute.
3. Turn the ignition ON.
4. Retest for DTCs P1AF4, P1AF5, P1AF6 and P1AF7.

Circuit/System Testing

Ignition ON, retest for DTCs P1AF4, P1AF5, P1AF6 and P1AF7.

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