P0A1D

DTC P0A1D

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor
DTC P0A1D
- Hybrid Powertrain Control Module Internal Performance

Circuit/System Description

The drive motor generator power inverter control module contains several microprocessors. The hybrid powertrain control module is part of the drive motor generator power inverter control module, and is not serviced separately. This diagnostic applies to internal microprocessor integrity conditions within the hybrid powertrain control module. The hybrid powertrain control module and each motor control module utilize a programmable logic device to perform certain input and output functions. At ignition ON, the programmable logic device expects to communicate with the hybrid powertrain control module and both motor control modules. The programmable logic device will communicate to motor control module 1 over an internal communication circuit when it has established communications with the hybrid powertrain control module. Motor control module 1 will communicate to the engine control module (ECM) over the serial data circuit if the programmable logic device has not established communication with the hybrid powertrain control module.

Conditions for Running the DTC

* The Ignition is ON.
* the system voltage is at least 8 V and no more than 18 V.

Conditions for Setting the DTC

The control module has detected an internal hybrid powertrain control module 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 may set this DTC.

Reference Information
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

1. Verify that a U-code DTC is not set.

• If a U-code DTC is set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

2. Ignition OFF, disconnect the 12 V battery. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.
3. Wait 2 minutes.
4. Connect the 12 V battery. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.
5. If the DTC is set, program the T6 drive motor generator power inverter module. If the DTC resets, replace the T6 drive motor generator power inverter module.

Repair Instructions

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

Control Module References Control Module References for Drive Motor Generator Power Inverter Module replacement, setup, and programming.