Anti-lock Braking System(ABS) 22 D. REAR WHEEL SPEED SENSOR : 1. Position the vehicle on two post lift. 2. Disconnect electrical connector of wheel speed sensor located on the outer side of the chassis long member. CAUTION : Take proper precautions while disconnecting the wheel speed sensor from vehicle wiring harness, otherwise it might damage the pins of the connecter 4. Remove sensor mounting screw and remove the wheel speed sensor from the rear axle. NOTE : Before replacing wheel speed sensor carry out diagnosis of wheel speed sensor. (Refer Troubleshooting and Diagnosis) Installation : 1. Clean the speed sensor and its mounting surface. 2. Check the air gap as follows: a. Insert a depth gauge and measure the distance between the toner ring top surface and rear axle sensor mounting surface. Let it be ‘A’. b. Measure the length of the sensor probe. Let it be ‘B’. c. Air Gap = A – B NOTE : Air gap should be between 0.375mm to 0.875mm. 3. Route the cable properly. 4. Connect the wiring harness connector to wheel speed sensor cable. 5. Make sure that the sensor cable connector is fully seated and locked into vehicle wiring harness connector. 6. Insert the sensor into the sensor mounting hole and tighten the bolt to the specified torque (1.0 Kg-m). 7. Clear all fault codes and road test the vehicle to ensure proper operation of the brake system.
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