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.

• If there is any malfunction, replace the front ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)

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.

• If not within the specification, replace the front ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)

Clearance

• 0.4—0.8 mm {0.02—0.03 in}