Diagnostic Test
WARNING: This page is about a different car, the 2018 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
- Turn the ignition on.
- With the scan tool, read DTCs.
Does the scan tool display this DTC as active?
Yes
- Go To 2
No
- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- CAN BUS DTCS SET IN BODY CONTROL MODULE (BCM) NOTE:
Verify that the BCM has the correct vehicle configuration before proceeding with this test step.
- With the scan tool, read the DTCs in the BCM.
Are there any active CAN Bus DTCs present?
Yes
- Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
No
- Replace the Adaptive Front Lighting System (AFLS) Module in accordance with the Service Information. Refer to MODULE, ADAPTIVE FRONT LIGHTING SYSTEM, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- With the scan tool, read the DTCs in the BCM.