DTC C1203 Wheel Speed Sensor Front-RH Open/Short: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible cause
DTC Strategy	Current Monitoring	Open or short of Wheel speed sensor circuit Faulty Wheel speed sensor Faulty HECU
Detect Mode	Initial Check Outside the ABS control cycle Inside the ABS control cycle Diagnosis mode Failure mode
Enable Conditions	When the sensor signal current is continuously out of the specified range of 4 mA ± 10% ~ 22 mA ± 10% for 140msec.
Fail Safe	Sensor failure outside of the ABS control cycle Only one wheel failure: Only the ABS functions are inhibited. The ABS warning lamps are activated and the EBD warning lamp is not activated. More than two wheels failure: System down. The ABS/EBD functions are inhibited. The valve relay and all solenoids are prevented from being switched on. The ABS/EBD warning lamps are activated. Sensor failure inside the ABS control cycle One front wheel failure: Inhibit the ABS control of the failed-wheel and maintain the ABS control of normal wheel. After the ABS control, the ABS functions are inhibited. The ABS warning lamps are activated and the EBD warning lamp is not activated. Failure at one rear wheel: ABS control of both front wheels are inhibited and the pressure of both rear wheels are decreased. After the controller completes the ABS control, the ABS functions are inhibited. The ABS warning lamps are activated and the EBD warning lamp is not activated. More than 2 wheels failure: System down. The ABS/EBD functions are inhibited. The valve relay and all solenoids are prevented from being switched on. The ABS/EBD warning lamps are activated.