FRONT ABS WHEEL-SPEED SENSOR INSPECTION

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Installation Visual Inspection

1. Inspect the following items:

  • If there is any malfunction, replace the applicable part.

  (1) Excessive play of the front ABS wheel-speed sensor

  (2) Deformation of the front ABS wheel-speed sensor

Clearance Inspection

1. Remove the front ABS wheel-speed sensor.

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

3. Measure the distance between the front ABS wheel-speed sensor installation surface and the tip of front ABS wheel-speed sensor. This is dimension B.

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

  Clearance (mm {in}) = A – B

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

  • If there is any malfunction, replace it.

  Clearance

  0.3—1.0 mm {0.012—0.057 in}

Sensor Output Value Inspection

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

1. Turn the ignition switch to the LOCK position.

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

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

  • LF_WSPD
  (LF wheel-speed sensor)
  • RF_WSPD
  (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.

  • If there is any malfunction, replace the front ABS wheel-speed sensor.