Test Description
The numbers below refer to the step numbers in the test procedure.
- 3 - 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 will determine the correct diagnostic procedure to use.
- 5 - The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.