FRONT ABS WHEEL-SPEED SENSOR INSPECTION
2016 – MX-5 – Brakes
FRONT ABS WHEEL-SPEED SENSOR INSPECTION
Sensor Output Value Inspection
CAUTION:
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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:
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WSPD_SEN_LF (LF wheel-speed sensor)
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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.
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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:
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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:
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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.
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If not within the specification, replace the front ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
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Clearance
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0.4—0.8 mm {0.02—0.03 in}