Diagnostic System Check
DIAGNOSTIC SYSTEM CHECK
TEST DESCRIPTION
Steps 1 - 9:
The numbers below refer to the step numbers on the diagnostic table.
4. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or GM Lan circuit or due to a total malfunction of the class 2 serial data circuit or GM Lan circuit. The specified procedure will determine the particular condition.
5. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or GM Lan circuit or due to a total malfunction of the class 2 serial data circuit or GM Lan circuit. The specified procedure will determine the particular condition.
6. The symptom list in Symptoms will determine the correct diagnostic procedure to use.
7. 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.
8. 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.