C1281

Diagnostic Chart:

Electrical Schematic:

CIRCUIT DESCRIPTION
If excessive use of the Antilock Brake or Traction Control systems is detected by the Electronic Brake/Traction Control Module (EBCM/EBTCM), it will disable Traction Control due to a possible brake over temperature condition. Excessive braking and/or Traction Control could result in degraded braking performance or possible damage to the rotors and/or brake pads.

CONDITIONS FOR SETTING THE DTC
The temperature values are an estimated figure calculated by the EBTCM. If the driven wheel brake rotors are known to be below the estimated figure, and the Brake Lamp Switch is properly adjusted and the Brake Lamp Switch CKT is OK, the likely cause of the malfunction is probably a defective EBTCM.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored. The EBTCM illuminates the TRACTION OFF indicator and TCS is disabled as long as both driven wheel brake rotor temperatures are above the estimated figure. If the rotor temperatures go below the estimated figure, then the TRACTION OFF indicator will be turned OFF.

DIAGNOSTIC AIDS
Possible Causes:
- Repeated heavy use of the Antilock Brake or Traction Control systems.
- Intermittent wheel speed sensor signal.