#
FRONT ABS WHEEL-SPEED SENSOR INSPECTION

BHE041543720W02

## Installation Visual Inspection

1. Inspect the following items:

  • If there is any malfunction, replace the applicable part.
  (1) Excessive play of the ABS wheel-speed sensor
  (2) Deformation of the ABS wheel-speed sensor

## Resistance inspection

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

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

  Resistance
  0.79-2.2 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, replace the front ABS wheel-speed sensor.

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:

  • LF_WSPD
  (LF wheel-speed sensor)
  • RF_WSPD
  (RF 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 front ABS wheel-speed sensor.