Diagnostic System Check

DIAGNOSTIC SYSTEM CHECK - CELLULAR COMMUNICATION

TEST DESCRIPTION

Steps 1-8:

The numbers below refer to the step numbers on the diagnostic table.
2. Lack of communication may be due to a partial malfunction or a total malfunction of the class 2 serial data circuit. The specified procedure will determine the condition.
5. The presence of DTCs which begin with "U" indicate some other system control module is not communicating.