#
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

## Clearance Inspection

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}

## Resistance inspection

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

## Voltage Pattern Inspection

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.

## Sensor Output Value Inspection

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.