Diagnostic Aids

Do not use a magnet to clean the encoder ring.
Inspect the wheel encoder ring for rust or corrosion.
Inspect the wheel speed sensors and components for the correct parts.
If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.
If symptom code 0F, 27, or 5A is set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.
If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.