Diagnostic System Check - Door Systems

DIAGNOSTIC SYSTEM CHECK - DOOR SYSTEMS

TEST DESCRIPTION

Steps 1 - 5:

Steps 6 - 11:

The number(s) below refer to the step number(s) on the diagnostic table.
2. Enabling the headlamps in this step verifies that a door module is not using an alternate path to ground through the switch illumination circuit.Lack of communication may be due to a partial or 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 U1161, U1162, U1163 or U1170 indicate one or more of the door modules is not communicating on the power door serial data circuits.
6. The presence of other DTCs which begin with "U" indicate some other system control module is not communicating. The specified procedure will compile all the available information before tests are performed.