DTC 31

DTC 31 Speed Sensor Circuit

CIRCUIT DESCRIPTION

Speed Sensor Circuit Description:

The Speed Sensor detects 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 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.

FAIL SAFE FUNCTION
If trouble occurs in the speed sensor circuit, the ECU cuts off current to the ABS Solenoid Valve Relay and prohibits ABS control.

Codes 31, 32, 33, 34, 35, 36, 38 & 39: Speed Sensor Circuit DTC Chart:

NOTE: DTC Nos.31 and 35 are for the Right Front Speed Sensor.
DTC Nos.32 and 36 are for the Left Front Speed Sensor.
DTC Nos.33 and 38 are for the Right Rear Speed Sensor.
DTC Nos.34 and 39 are for the Left Rear Speed Sensor.

Speed Sensor Circuit Wiring Diagram:

Speed Sensor Circuit, Inspection Procedure (Part 1 Of 3):

Speed Sensor Circuit, Inspection Procedure (Part 2 Of 3):

Speed Sensor Circuit, Inspection Procedure (Part 3 Of 3):