Diagnostic System Check - Horns

TEST DESCRIPTION

Steps 1-4:

The number(s) below refer to the step number(s) on the diagnostic table.
2. The inability of the body control module (BCM) to enter the diagnostic mode may be due to a BCM malfunction.
3. The symptoms list in Symptoms will determine the correct diagnostic procedure to use.

"For a description of the RPO Code(s) shown in this article or any of the images therein, refer to the RPO Code List found at Vehicle/Application ID". RPO Codes