Circuit Description
The transmission control module (TCM) monitors various parameters and will not allow traction control operation if any parameter falls outside a specified range.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0276 TCM Traction Control Not Allowed
Conditions for Running the DTC
| • | The ignition is ON. |
| • | Ignition voltage is greater than 8 volts. |
Conditions for Setting the DTC
The TCM sends a serial data message to the electronic brake control module (EBCM) indicating that torque reduction is temporarily not allowed.
Action Taken When the DTC Sets
| • | The EBCM disables the engine management portion of the Traction Control System (TCS). |
| • | The Traction Off indicator turns ON. |
| • | The Antilock Brake System (ABS) remains functional. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and the DTC is cleared with a scan tool. |
| • | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
This DTC is for information only. As an aid to the technician, this DTC indicates that there are no problems in the ABS/TCS System. This DTC C0276 will set in addition to TCM P codes, verify and correct the DTCs in the transmission control module.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | |
