P1B14

DTC P1B13 or P1B14

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 P1B13
- Programmable Logic Device - Drive Motor 1 Control Module Performance

DTC P1B14
- Programmable Logic Device - Drive Motor 2 Control Module Performance

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. The HPCM monitors the ability of the PLD to perform these functions.

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

* DTCs P1B13 and P1B14 are Type A DTCs.
* The HPCM commands the battery energy control module (BECM) to open the high voltage contactor relays.

Conditions for Clearing the DTC

DTCs P1B13 and P1B14 are Type A DTCs.

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 P1B13 or P1B14.

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 P1B13 or P1B14.

^ 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