Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P2544: Transmission Torque Request CircuitCircuit/System Description
The engine control module (ECM) and the transmission control solenoid (w/body and TCM) valve assembly use the controller area network (CAN) to give and receive messages. This fault is handled inside the TCM assembly and no external circuits are involved. The DTC sets when the TCM receives a "torque request invalid" message from the ECM. Since the "torque request invalid" is controlled by the ECM, it is a tell-tale TCM DTC pointing back to the ECM.
Conditions for Running the DTC
| • | The control solenoid (w/body and TCM) valve assembly runs the program to detect an internal fault when the key is ON or the engine is running. |
| • | Ignition voltage is 8-18 volts. |
Conditions for Setting the DTC
The ECM detects engine torque is inaccurate due to an ECM input.
Action Taken When the DTC Sets
DTC P2544 is a Type C DTC.
Conditions for Clearing the DTC
DTC P2544 is a Type C DTC.
Diagnostic Aids
DTC P2544 can not be cleared from the TCM until the related ECM codes have been diagnosed and cleared.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
DTC Type Reference
Electrical Information Reference
Circuit/System Verification
- Start the engine.
- Let the engine run for 1 minute, then shut the engine OFF for 30 seconds.
- Retest for DTC P2544.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Refer to Diagnostic Trouble Code (DTC) List - Vehicle to correct any ECM DTCs.
