Diagnostic System Check - Door Systems
TEST DESCRIPTIONSteps 1-7:
The numbers below refer to the step numbers on the diagnostic table.
2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
4. The symptom list in Symptoms will determine the correct diagnostic procedure to use.
5. The presence of DTCs U1016, U1064, U1255 or U1300 indicates the memory mirror module (MMM) is not communicating on the class 2 serial data circuit.