Code 62
- Code 62 indicates a problem with wheel speed sensor(s) or a faulty hydraulic unit. A false Code 62 may be set, however, if vehicle is driven for long periods on snow or ice, left and right tires are different sizes, or brakes are dragging.
- Test each wheel speed 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.
- 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.
- Inspect all wheel speed sensor rotors for damaged and missing teeth. Replace any damaged rotors. Using an oscilloscope, check waveform patterns and output voltage. See Figure . Output voltage should be 0.2 volts (200 mV). If all rotors and wheel speed sensors are okay, go to next step.
- If after all testing procedures have been completed system is not functioning properly, substitute ABS ECU with known good unit and retest. If Code 62 does not reset, replace original ECU. If Code 62 does reset, replace hydraulic unit.