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Home >> Mitsubishi >> 1993 >> Expo Base, AWD, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnosis & Testing >> Code 15 >> Faulty Wheel Speed Sensor Output
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Faulty Wheel Speed Sensor Output

  1. This code normally is set when Codes 11-14 are set. Test each sensor. See WHEEL SPEED SENSOR under COMPONENT TESTING  . If all sensor voltages and resistances are within specification, go to next step. If any sensor is malfunctioning, replace sensor. See WHEEL SPEED SENSOR under REMOVAL & INSTALLATION  .
  2. 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.
  3. 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 trouble code does not reset.
Fig 1: Identifying Abnormal ABS Rotor Waveform Patterns
G93B00266Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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