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 P150C: Transmission Control Module (TCM) Engine Speed Request CircuitCircuit/System Description
The transmission control module (TCM) and the engine control module (ECM) monitor the number of Engine Speed Request Circuit serial data messages transmitted/received between modules. If the ECM detects a faulty message count, DTC P150C sets.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
The ECM detects greater than 2 message count errors.
Action Taken When the DTC Sets
| • | The ECM Disables engine speed requests from transmission. |
| • | DTC P150C is a type B DTC. |
Conditions for Clearing the DTC
DTC P150C is a type B DTC.
Diagnostic Aids
A problem on the serial data circuit will not cause this DTC.
Reference Information
Description and Operation
Data Link Communications Description and Operation
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
| ⇒ | If the DTC resets, replace the TCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for TCM replacement, setup, and programming.
