DTC 39

DTC 39 Open Circuit in Left Rear Wheel Speed Sensor Circuit

CIRCUIT DESCRIPTION

DTC Detecting Condition:

Speed sensor detects the wheel speed and sends the appropriate signals to the ECU. These signals are used to control of the ABS system. The front and rear rotors each has 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.31 and 35 are for the right front speed sensor.
- DTC No.32 and 36 are for the left front speed sensor.
- DTC No.33 and 38 are for the right rear speed sensor.
- DTC No.34 and 39 are for the left rear speed sensor.

Fail safe function:
If a trouble has occurred in the speed sensor circuit, the ECU cuts off the current to the ABS solenoid valve relay and prohibits the ABS control.

Wiring Diagram:

Step 1:

Step 2 - 4:

Step 4 Continued:

INSPECTION PROCEDURE