FRONT ABS WHEEL-SPEED SENSOR INSPECTION

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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 main power OFF.

2.  Connect the M-MDS to the DLC-2.

3.  Select the following electronically controlled brake unit PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION.) (See PID/DATA MONITOR TABLE [ELECTRONICALLY CONTROLLED BRAKE UNIT].)

•  WSPD_SEN_L/F (LF wheel-speed sensor)

•  WSPD_SEN_R/F (RF wheel-speed sensor)

4.  Switch the main power ON (READY on) 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:

•  Excessive play of the front ABS wheel-speed sensor

•  Deformation of the front ABS wheel-speed sensor

•  Deformation or damage of the ABS sensor rotor

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

Clearance Inspection

Preparation prior to inspection

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

2.  Remove the wheel hub and steering knuckle as a single unit. (See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION.)

3.  Install the front ABS wheel-speed sensor to the removed wheel hub, steering knuckle component, and tighten to the specified torque.

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Clearance inspection

1.  Measure the gap between the ABS sensor rotor and front ABS wheel-speed sensor using a feeler gauge.

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•  If not within the specification, verify the following items and repair or replace if necessary.

―  Is there deformation or damage to the ABS sensor rotor?

―  Is there deformation or damage to the ABS wheel speed sensor?

―  Is there foreign matter adhering?

Servicing after inspection

1.  Remove the front ABS wheel-speed sensor from the wheel hub, steering knuckle component.

2.  Install the wheel hub, steering knuckle component. (See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION.)

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

4.  Inspect the front wheel alignment. (See FRONT WHEEL ALIGNMENT.)