Inspection and Verification
WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.VISUAL INSPECTION CHART
Electrical - Battery junction box (BJB) fuse(s):
- 3 (10A) (no communication with PCM)
- 13 (10A) (no communication with vehicle dynamics module [VDM])
- 20 (15A) (no communication with PCM)
- 106 (40A) (no communication with ABS module)
- 109 (20A) (no communication with ABS module)
- Central junction box (CJB) fuse(s):
- 2 (10A) (no communication with restraints control module [RCM])
- 8 (10A) (no communication with IC, LTM)
- 13 (10A) (no communication with IC, parking aid module [PAM], VDM, ABS module)
- 15 (10A) (no communication with HVAC module)
- 16 (20A) (no power to scan tool)
- 19 (7.5A) (no communication with driver door module [DDM], driver seat module [DSM], LTM)
- 23 (10A) (no communication with lighting control module [LCM])
- 25 (10A) (no communication with HVAC module, IC)
- 32 (7.5A) (no communication with rear audio and temperature control (RATC) module)
- Data link connector (DLC)
- Wiring harness
- Wiring, terminals or connectors.
- Battery junction box (BJB) fuse(s):
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the scan tool to the DLC.
If the scan tool does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM.
- Go to Pinpoint Test P , to diagnose no power to the scan tool.
- Carry out the network test.
- If the network test passes, retrieve and record the continuous memory DTCs and proceed to Step 6.
- If the network test fails, go to Symptom Chart to identify the module not communicating.
- If the DTCs retrieved are related to the concern, go to DTC Tables. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
- If no DTCs related to the concern are retrieved, go to Symptom Chart .
NOTE:
Make sure to use the latest scan tool software release.
NOTE:
The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
NOTE:
During the network test, the scan tool will first attempt to communicate with the PCM, after establishing communication with the PCM, the scan tool will then attempt to communicate with all other modules on the vehicle.