Diagnostic Messages

Diagnostic Chart:

Wiring Diagram:

1. This test determines if the Class 2 Data Bus itself is malfunctioning.

2. This test checks for a short to ground in CKT 1807.

3. This test checks for a short to voltage in CKT 1807.

4. This test starts a process to determine which module is causing the Class 2 Data Bus to stop communicating.