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FRONT ABS WHEEL-SPEED SENSOR INSPECTION

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2016 – MX-5 – Brakes

FRONT ABS WHEEL-SPEED SENSOR INSPECTION

Sensor Output Value Inspection

CAUTION:

  • Resistance inspection using other testers may cause damage to the front ABS wheel-speed sensor internal circuit. Be sure to use the M-MDS to inspect the front ABS wheel-speed sensor.

1. Switch the ignition off.

2. Connect the M-MDS to the DLC-2.

3. Select the following PIDs using the M-MDS:

  • WSPD_SEN_LF (LF wheel-speed sensor)

  • WSPD_SEN_RF (RF wheel-speed sensor)

4. Start the engine and drive the vehicle.

5. Verify that the display of the M-MDS shows the same value as the speedometer.

Installation Visual Inspection

1. Inspect for the following:

  • If there is any malfunction, repair or replace the part.

a. Excessive play of the front ABS wheel-speed sensor

b. Deformation of the front ABS wheel-speed sensor

c. Deformation or damage of the ABS sensor rotor

d. Adhering foreign matter

Clearance Inspection

1. Remove the front ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)

2. Measure the distance between the front ABS wheel-speed sensor installation surface and the ABS sensor rotor. This is dimension A.

3. Calculate the clearance between the front ABS wheel-speed sensor and the ABS sensor rotor using the following formula:

  • Clearance (mm ) = A-14 {0.55}

4. Verify that the clearance between the front ABS wheel-speed sensor and ABS sensor rotor is as indicated below.

    Clearance

  • 0.4—0.8 mm {0.02—0.03 in}

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