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 Instructionsprovides an overview of each diagnostic category.

DTC Descriptor
DTC P0A2F
- Drive Motor 1 Overtemperature

Circuit/System Description

The transmission contains two electric motor generators. The drive motor generators are cooled by the transmission fluid. Hot fluid exits the drive motor generator housing and flows to the transmission cooler supply line. The supply line connects to the cooler. From the cooler, the fluid returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the fluid returns to the oil pan. The motor temperature sensor is part of the drive motor generator assembly and is not serviced separately.

Conditions for Running the DTC

DTC P0A2B is not set.

Conditions for Setting the DTC

The motor temperature sensor is greater than 200°C (392°F) for 3 seconds and has not fallen below 135°C (275°F).

Action Taken When the DTC Sets

* DTC P0A2F is a Type B DTC.
* The hybrid powertrain control module commands the engine into derate mode.
* Autostop is disabled.

Conditions for Clearing the DTC

DTC P0A2F is a Type B DTC.

Diagnostic Aids

* The driver information center, if equipped, will display 'TRANSMISSION HOT- Idle Engine' when the transmission fluid temperature is greater than 132°C (270°F) for 10 minutes.
* Ask about the customer's driving habits, trailer towing, etc.
* Ensure the engine cooling system is functioning normally.
* The hybrid powertrain control module will reduce drive motor generator torque at temperatures greater than 160°C (320°F). Drive motor generator torque is reduced to zero if the temperature reaches 190°C (374°F).

Reference Information
Description and Operation

Electronic Component Description Electronic Component Description
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference

Control Module References Programming and Relearningfor scan tool information

Circuit/System Verification

1. Verify that DTC P0A2C is not set.

• If DTC P0A2C is set, Refer to DTC P0A2B-P0A2D or P0A31-P0A33 P0A2B.

2. Ignition ON, observe the scan tool ECM engine coolant temperature (ECT) parameter in freeze frame data. The reading should be below 125°C (257°F).

• If the ECT was above 125°C (257°F) when the DTC set, go to Symptoms - Engine Cooling Symptoms - Engine Cooling and correct that concern first.

3. Ignition ON, observe the scan tool motor 1 temperature and motor 2 temperature parameters in freeze frame data. The reading should be above 200°C (392°F). If greater than the specified value, go to Automatic Transmission Overheating Automatic Transmission Overheating. If the transmission tests normal, replace M15A drive motor 1 generator.

Repair Instructions

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

Drive Motor with Generator Assembly Removal - 1st Position 8. Drive Motor with Generator Assembly Removal - 1st Position