ABS W/EBD System

DTC C1238 FOREIGN MATTER IS ATTACHED ON TIP OF RIGHT REAR SENSOR

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used for control of the ABS control system. The front and rear rotors each have 48 serrations.

When the rotors rotate, the magnetic field emitted by the permanent magnet in the speed sensor generates an AC voltage. Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.

HINT:
DTC No. C0210/33, C1238/38 is for the right rear speed sensor.
DTC No. C0215/34, C1239/39 is for the left rear speed sensor.

Wiring Diagram:

Step 1 - 2:

Step 3 - 5:

Step 6:

INSPECTION PROCEDURE

HINT: Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not using hand-held tester.