Electromagnetic Interference

The ABS components are sensitive to Electromagnetic Interference (EMI). Perform the following checks if an intermittent malfunction is suspected:
- Check for proper installation of wiring harnesses resulting from add-on options.
- Visually inspect the wheel speed sensor and the toothed ring for the following:
- Visually inspect for looseness.
- Visually inspect for damage.
- Visually inspect for foreign material accumulation.
- Visually inspect for proper mounting.
- Replace any damaged components. Remove any foreign material and properly attach all components.

- Check for proper routing of front wheel speed sensor wiring away from spark plug wires.
- Use special tool J39200 DMM to measure the resistance of the spark plug wires. Refer to Spark Plug Wires Not Operating Properly in Starting and Charging for proper spark plug wire resistance.
- Monitor the scan tool wheel speeds while test driving the vehicle. Refer to the appropriate wheel speed DTC if any wheel speed drops or displays an erratic speed.