DTC C1200: Wheel Speed Sensor Front-LH Open/Short: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible cause
DTC Strategy		Voltage monitoring	Open or short of Wheel speed sensor circuit Inoperative Wheel speed sensor Inoperative HECU
Case 1	Monitoring Period	Once after power up.
Case 1	Enable Conditions	Shorts between WSS lines and shorts to UZ can be detected by switching single WSS channels in sequence. If there is an error after end of test, a failure is recognized. In case of a WSS power line short to V_batt, this FSA test will detect an under voltage failure. (ABS only)* FSA test: fail save circuit test* UZ: Ignition Voltage
Case 2	Monitoring Period	Continuous
Case 2	Enable Conditions	When the sensor current levels are out of permissible range (LOW: 7 mA, HIGH: 14 mA) for 200 ms.
Fail Safe		Sensor failure outside of the ABS control cycle Only one wheel failure: Only the ABS/ESC functions are inhibited. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated. Two wheels failure: Only the ABS/ESC functions are inhibited. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated. More than 3 wheels failure: System down. The ABS/EBD/ESC functions are inhibited. The ABS/EBD/ESC warning lamps are activated. Sensor failure inside the ABS control cycle One front wheel failure: Inhibit the ABS/ESC control. Pressure is increased on a front wheel, Pressure is decreased on a rear wheel. After the ABS/ESC control, the ABS/ESC functions are inhibited. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated. Two wheels failure: Inhibit the ABS/ESC control. Pressure is increased on a front wheel, Pressure is decreased on a rear wheel. After the ABS/ESC control, the ABS/ESC functions are inhibited. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated. More than 3 wheels failure: System down. The ABS/EBD/ESC functions are inhibited. The ABS/EBD/ESC warning lamps are activated.