Foreign Object Is Attached on Tip of Front speed Sensor LH

DTC C1235/35 Foreign Object is Attached on Tip of Front Speed Sensor RH
DTC C1236/36 Foreign Object is Attached on Tip of Front Speed Sensor LH
DTC C1238/38 Foreign Object is Attached on Tip of Rear Speed Sensor RH
DTC C1239/39 Foreign Object is Attached on Tip of Rear Speed Sensor LH
DTC C1275/75 Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)
DTC C1276/76 Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)
DTC C1277/77 Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)
DTC C1278/78 Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)

DESCRIPTION

DTC DETECTION CONDITION:

The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for the ABS control 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 C1275/75 to C1278/78 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs C1 275/75 to C1 278/78 are output only in the Test Mode.

HINT:
^ DTC C1235/35 is for the front speed sensor RH.
^ DTC C1236/36 is for the front speed sensor LH.
^ DTC C1238/38 is for the rear speed sensor RH.
^ DTC C1239/39 is for the rear speed sensor LH.

WIRING DIAGRAM:

WIRING DIAGRAM:

NOTICE: When replacing the skid control ECU, perform zero point calibration.

HINT: When C0200/31, C0205/32, C0210/33 or C0215/34 is output together with C1235/35, C1236/36, C1238/ 38 or C1239/39, inspect and repair the trouble areas indicated by C0200/31, C0205/32, C0210/33, or C0215/34 first.

INSPECTION PROCEDURE

Steps 1-2:

Steps 2 (Continued)-3:

Steps 3 (Continued)-6:

Steps 7-8: