Outline Of Diagnosis

The electric brake booster control module monitors the output voltage and power supply voltage of the speed sensors. If the output voltage of the speed sensor is outside the normal range, or if the voltage at main power supply of the electric brake booster control module is normal and the power supply voltage of the speed sensor drops below a specific value, the electric brake booster control module judges that the circuit of the speed sensor is malfunctioning and illuminates the MIL and stores a DTC.