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BR -88 BRAKE SYSTEM Item Detecting Condition Possible cause Monitoring Period • Continuous ( If vehicle speed > 12 m/s) - but this monitoring is disabled in the following event Aquaplaning. 2) Interference. 3) Supply voltage below 7.6 or above 18 Volts Case2 Enable Conditions • No wheel speed signals within 10 ms to 20 ms at a vehicle speed > 12 m/s (43.2 km/h ). - If the dynamic sensor monitor responses, Monitoring Period • Main Monitoring The main monitor needs additional information of > 20 km/h and no under voltage is detected. • Backup Monitoring - Continuous Case3 Enable Conditions • Main Monitoring 1) If the maximum difference of wheel speeds 2) Detection filter time : • Backup Monitoring 1) If the deviation between the fastest and 2) When the velocity is below 50 km/h, if the 3) Detection filter time : normally 20 s Monitoring Period • Continuous Case4 Enable Conditions • The pulse width of wheel speed sensor is below 2 ms when vehicle speed is > 0 km/h and < 20 km/h. |