P0A2F

DTC P0A2F

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 P0A2F

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Drive Motor High Temperature

Circuit/System Description

The generator control module also called the starter generator control module is comprised of the following three control modules; the hybrid powertrain control module, 14 volt power module and the drive motor control module. These three control modules are non serviceable and are part of the generator control module.

The starter generator is also referred to as the drive motor. The drive motor temperature sensor is a variable resistor that measures the temperature of the drive motor stator windings. The hybrid powertrain control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The drive motor temperature sensor resistance changes with drive motor coolant temperature. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases. The hybrid powertrain control module monitors the drive motor temperature sensor to determine the temperature of the drive motor.

Conditions for Running the DTC

* DTC P0A2B, P0A2C, and P0A2D is not set.

* The drive motor control module and hybrid powertrain control module are awake.

Conditions for Setting the DTC

The motor temperature sensor is greater than 165°C (329°F) for 5 seconds.

Action Taken When the DTC Sets

* DTC P0A2F is a Type B DTC.

* The hybrid powertrain control module system starts to reduce the maximum torque beginning at 155°C (311°F) down to 0 Nm as the drive motor stator temperature approaches 165°C (329°F).

Conditions for Clearing the DTC

DTC P0A2F is a Type B DTC.

Diagnostic Aids

* Ask about the customer's driving habits, trailer towing, etc.

* Ensure the engine cooling system is functioning normally.

* Ensure the starter generator cooling system is functioning normally.

Reference Information

Schematic Reference

Hybrid/EV Energy Storage Schematics

Description and Operation

* Starter Generator Description and Operation

* Generator Control Module Description and Operation

* Hybrid Modes of Operation Description

DTC Type Reference

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

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Check the cooling system for the correct amount of coolant. Refer to Cooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (GE 47716)Cooling System Draining and Filling (Static Fill) Cooling System Draining and Filling (Static Fill).

2. Verify that DTC P0A2C is not set.

• If DTC P0A2C is set, Refer to DTC P0A2B-P0A2D P0A2B.

3. Ignition ON, observe the scan tool motor temperature parameter. The reading should be less than 165°C (329°F). If greater than the specified value, replace the starter generator assembly.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Starter Generator Replacement for Drive Motor replacement