C1239 TOYOTA - Foreign Object Attached On Tip Of Left Rear Sensor
- Faulty Left Rear Speed Sensor
- Left Rear Speed Sensor rotor
- Sensor installation
- Brake actuator (skid control ECU)
- ABS warning light ON
C1239 TOYOTA Description
When the rotors rotate, the magnetic field emitted by the permanent magnet in the speed sensor generates 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.
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