Circuit Description

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

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.

Fig 1: Speed Sensor Circuit Description

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Fig 2: DTC Detection Condition And Trouble Area Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• DTC No. C0200/31 and C1235/35 are for the right front speed sensor.
• DTC No. C0205/32 and C1236/36 are for the left front speed sensor.
• DTC No. C0210/33 and C1238/38 are for the right rear speed sensor.
• DTC No. C0215/34 and C1239/39 are for the left rear speed sensor.