DTC 15: Faulty Wheel Speed Sensor Output
NOTE:
If after all testing procedures have been completed system is not functioning properly, substitute ECU with known-good unit and retest.
- Verify that all 4 tires are the same diameter. If all wheels are same diameter, go to next step. If all wheels are not same diameter, correct so all 4 wheels are same diameter.
- This DTC normally is set when other wheel speed sensor DTCs are set. Test each sensor. See WHEEL SPEED SENSOR under COMPONENT TESTS. If all sensor voltages and resistances are within specification, go to next step. Replace any malfunctioning sensor. See WHEEL SPEED SENSOR under REMOVAL & INSTALLATION.
- Inspect and verify that all 4 wheel bearings are not loose or damaged. See appropriate article in FRONT or REAR SUSPENSION.
- Check each wheel speed sensor-to-rotor gap. See WHEEL SPEED SENSOR under ADJUSTMENTS. If all gaps are within specification, go to next step. If any gaps are not within specification, adjust sensor-to-rotor gap or replace senor.
- Inspect all wheel speed sensor rotors for damaged and missing teeth. Replace any damaged rotors. Using an oscilloscope, check waveform patterns. See Fig 1 . If all rotors are okay, replace ECU and road test vehicle. Ensure DTC does not reset.