REAR ABS WHEEL-SPEED SENSOR INSPECTION [4WD]

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Caution

•  Do not allow a magnetized tool such as a magnetized screwdriver to come into contact with the ABS sensor rotor. If the ABS sensor rotor becomes magnetized it will be unable to read the rear ABS wheel-speed sensor waveform correctly resulting in an ABS system malfunction to be determined and the inability to perform ABS control. If a magnetized object comes into contact with the ABS sensor rotor, it will be necessary to newly replace the rear drive shaft (ABS sensor rotor).

Sensor Output Value Inspection

Caution

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

•  WSPD_SEN_RR (RR ABS 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 rear ABS wheel-speed sensor. (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [4WD].)

Installation Visual Inspection

1.  Inspect the following items:

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

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

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

(3)  Deformation or damage of the ABS sensor rotor

Clearance Inspection

1.  Remove the rear ABS wheel-speed sensor. (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [4WD].)

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

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

Clearance (mm {in}) = A-34.35 {1.352}

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

•  If there is any malfunction, replace rear ABS wheel-speed sensor. (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [4WD].)