REAR ABS WHEEL-SPEED SENSOR INSPECTION

BHE041543710W02

Installation Visual Inspection

1. Inspect the following items:

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

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

(2) Deformation of the ABS wheel-speed sensor

(3) Deformation or damage of the ABS sensor rotor

1. Verify the clearance between the ABS sensor rotor and the ABS wheel-speed sensor.

• If there is any malfunction, check for improper installation, and replace if necessary.

Clearance

0.3-1.1 mm {0.012-0.043 in}

1. Measure the resistance between the ABS wheel-speed sensor terminals.

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

Standard

1.3-1.7 kilohms

1. Lift up the vehicle, and connect an oscilloscope to the ABS wheel-speed sensor connector.

2. While rotating each wheel by hand inspect the voltage pattern.

• If there is distortion or noise, inspect the sensor rotor.

Voltage pattern (reference)

• Oscilloscope setting:

1 V/DIV (Y), 2 ms/DIV (X), AC range

• Vehicle condition: Driving 30 km/h (18.6 mph)

Note

• As the vehicle speed increases, the voltage increases and the wave period shortens.

1. Turn the ignition switch off.

2. Connect the WDS or equivalent to the DLC-2.

3. Select the following PIDs using the WDS or equivalent:

• LR_WSPD

(LR wheel-speed sensor)

• RR_WSPD

(RR wheel-speed sensor)

4. Start the engine and drive the vehicle.

5. Verify that the display of the WDS or equivalent shows the same value as the speedometer.

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