Diagnostic System Check

DIAGNOSTIC SYSTEM CHECK

TEST DESCRIPTION

Steps 1-4:

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.
4. This step is checking for adequate system voltage. If the ignition voltage is low, RAP will be disabled in order to conserve power.