For 1990-2009 cars only
Circuit Description
The powertrain control module (PCM) monitors various engine 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 C0240 PCM 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 PCM 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 traction control system (TCS) until the DTC becomes a history DTC. |
| • | The 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.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
