Front
FRONT ABS WHEEL-SPEED SENSOR INSPECTIONInstallation 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.