The ABS Diagnostic System Check is an organized approach to identifying problems associated with the ABS. This must be the starting point for any ABS related concern and will direct you to the next logical step in diagnosing a malfunction. Most system malfunctions are linked to faulty wiring, connections and occasionally, to components. Understanding the ABS and using the diagnostic tables correctly will reduce diagnostic time and prevent unnecessary parts replacement.

The number below refers to the step number on the diagnostic table.

2. Lack of communication may be due to a malfunction of the UART serial data circuit. The specified procedure will determine the particular condition.