Left Rear Wheel Speed Sensor Signal Malfunction

DTC 34 LEFT REAR WHEEL SPEED SENSOR SIGNAL MALFUNCTION

CIRCUIT DESCRIPTION

Circuit Description:

DTC Detection Condition:

The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS, BA, TRAC, A-TRAC, VSC, DAC and HAC control systems. This speed sensor contains a sensor IC, which consists of two 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 skid control ECU.

HINT:
- DTC C0210/33 and C1238/38 are for the right rear speed sensor.
- DTC C0215/34 and C1239/39 are for the left rear speed sensor.

Wiring Diagram:

Step 1 - 2:

Step 3 - 4:

Step 5 - 6:

Step 6 (Contd.):

Step 7 - 8:

Step 9 - 11:

Step 12:

INSPECTION PROCEDURE

NOTE: When replacing the master cylinder solenoid, perform zero point calibration.

HINT: Start the inspection from step 1 when using the hand-held tester and start from step 3 when not using the hand-held tester.