SPEED SENSOR 2017 TOYOTA RAV4 2R FRONT RIGHT ABS SENSOR PART 89542-42060 HARRIER

FITS RAV4 HARRIER 89542-42060 FRONT RIGHT

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ABS (Anti-lock Braking System)Sensor Failure Symptoms:

Over time, exposure to road debris and other impurities can cause the ABS sensor to fail. Cleaning and inspecting the sensors at the intervals specified in the user manuals is vital for its optimal performance. One of the basic indications of a faulty ABS sensor includes the lighting up of the ABS light or traction control light in your vehicle's dashboard. Symptoms of a bad wheel speed sensor also include a considerable loss in traction when you are driving on slippery road conditions.

It is to be noted that the ABS sensor may not always be the culprit; the wiring or connectors can also go bad, failing to transmit the requisite signals to the ECM. So, before checking and replacing the ABS sensor, it is a good practice to inspect its related components and ascertain the right part which is at fault.

The ABS(anti-lock braking system):Four major components

Speed sensor/ABS sensor:
The ABS sensor is responsible for monitoring the speed of each wheel in the vehicle. The data is sent to the ECU and the information is utilized to command the hydraulic control modulator.
ABS valves:
The valves are necessary for regulating the air pressure to the brakes when the ABS is in action. Each valve is located in each brake line controlled by the ABS. The valves can open in three configurations. It can open fully to allow pressure from the master cylinder to be transferred directly to the brake calipers. The valve can close to constrict pressure inside the system. Finally, this valve can also open in small increments to release some of the braking pressure.
Hydraulic Control Unit(HCU):
The HCU is typically located in the engine bay. It receives electronic signals from the ECU to either release or applies pressure in the brakes when the ABS is triggered. You can think of the HCU as the commanding officer on the field. It only acts upon the discretion of the brains behind the entire operation.
Electronic Control Unit(ECU) :
The brains, the ECU is responsible for calculating and interpreting the signals from the ABS sensors. If the ECU detects a slip, it commands the HCU to increase hydraulic pressure or to bypass the pedal force altogether depending on existing driving conditions.