Diagnostic System Check

DIAGNOSTIC SYSTEM CHECK - RADIO, STEREO AND COMPACT DISC

TEST DESCRIPTION

Steps 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.
First design uses a class 2 amplifier, 2nd design uses a non-class 2 amplifier.
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.