P2797

DTC P2797

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 P2797
- Auxiliary Transmission Fluid Pump Performance

Circuit/System Description

The power inverter module, often referred to as the drive motor generator power inverter module contains three motor control modules and the hybrid powertrain control module. Two of the motor control modules operate their respective drive motor generator based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump motor. The hybrid powertrain control module and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground.

Conditions for Running the DTC

* The vehicle is ON.
* The system voltage is between 11.0 and 16.0 V.

Conditions for Setting the DTC

The actual auxiliary transmission fluid pump speed is 650 RPM less than the commanded speed.

Action Taken When the DTC Sets

DTC P2797 is a Type A DTC.

Conditions for Clearing the DTC

DTC P2797 is a Type A DTC.

Diagnostic Aids

There should always be other hybrid powertrain or motor control module DTCs set along with DTC P2797. Always diagnose other DTCs before addressing 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 no other hybrid powertrain or motor control module DTC is set.

• If any hybrid powertrain or motor control module DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
• If the DTC is set, refer to Auxiliary Fluid Pump Motor and Fluid Pump Disassemble 35. Auxiliary Fluid Pump Motor and Fluid Pump Disassemble , Table 1: Electric Auxiliary Pump Drive Motor Removal.

2. If the DTC is set, program the T6 power inverter module. If the DTC resets, replace the T6 power inverter module.

Repair Instructions

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

* Auxiliary Fluid Pump Motor and Fluid Pump Disassemble 35. Auxiliary Fluid Pump Motor and Fluid Pump Disassemble for Electric Auxiliary Pump Drive Motor Removal
* Control Module References Programming and Relearning for Drive Motor Generator Power Inverter Module, also called the power inverter module, replacement, programming, and setup.