Electronically Controlled Brake System
DTC C0200/31 Front Speed Sensor RH CircuitDTC C0205/32 Front Speed Sensor LH Circuit
DTC C1271/71 Low Output Signal of Front Speed Sensor RH (Test Mode DTC)
DTC C1272/72 Low Output Signal of Front Speed Sensor LH (Test Mode DTC)
DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS system. This speed sensor contains a sensor IC, which consists of 2 MREs (Magnetic Resistance Element). The speed sensor rotor, which consists of 48 sets of N and S poles that are arranged in a circle, is integrated with the inner race of the hub bearing. To detect the rotation direction, the output waves are used to determine the relationship of the pulses that are generated by 2 MREs. Upon receiving this signal, the sensor IC outputs a forward or backward wave to the ECU. DTCs C1271/71 and C1272/72 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs C1271/71 and C1272/72 are output only in the Test Mode.
DTC Detection Condition (part 1):
DTC Detection Condition (part 2):
DTC Detection Condition (part 3):
HINT: DTC C0200/31 is for the right front speed sensor. DTC C0205/32 is for the left front speed sensor.
Wiring Diagram:
NOTICE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration. Programming and Relearning
HINT: Start the inspection from step 1 when using the intelligent tester and start from step 3 when not using the intelligent tester.
INSPECTION PROCEDURE
Step 1:
Steps 1-2:
Steps 3-5:
Steps 6-7:
Steps 8-9:
