General Information

Component Location





General Description

The instantaneous brake disc temperature will be computed at the wheel brakes of all driven wheels with the following inputs : (1. vehicle and brake constants, 2. the vehicle speed, 3. all wheel speeds, 4. the computed brake pressure during active brake torque control, 5. the vehicle deceleration during braking with and without ABS control.) A failure is detected if the computed brake disc temperature exceeds 500°C at a minimum one wheel brake. The BTCS remain deactivated until the computed brake disc temperature of all wheel brakes drops below 350°C. With the ignition turned off, the ECU is supplied with energy via power supply voltage until the computed brake temperature at the driven wheels drops below 70°C.

DTC Description

If the HECU decides that the Disc is over-heated (above 500°C), then it turns the TCS lamp ON and inhibits BTCS operation to prevent overheating of the disc.
If the calculated temperature becomes lower than specified value (approx. 350°C), then the HECU turns the TCS lamp OFF and operates the BTCS again.

DTC Detecting Condition