DTC 31

DTC 31, 32, 33,34, 35, 36 Speed Sensor Circuit

CIRCUIT DESCRIPTION







The speed sensor detects the wheel speed and sends the appropriate signals to the ECU. These signals are used for control of the ABS system. The front rotor and rear rotor 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 proportion to the speed of the rotors (wheels), the frequency is used by the ECU to detect the speed of each wheel.







HINT: DTC 31 is for the right front wheel speed sensor.
DTC 32 is for the left front wheel speed sensor.
DTC 33 is for the right rear wheel speed sensor.
DTC 34 is for the left rear wheel speed sensor.

Fail safe function: If trouble occurs in the speed sensor circuit, the ECU cuts off current to the ABS control (solenoid) relay and prohibits ABS control.

DIAGNOSTIC CHART

Wiring Diagram:

INSPECTION PROCEDURE

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