Inspection and Verification
WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. 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):
- MIDI 80A (no communication with power steering control module [PSCM])
- 5 (10A) (no communication with PCM, traction battery control module [TBCM] [Hybrid only])
- 6 (5A) (no communication with ABS module [Hybrid only])
- 8 (5A) (no communication with transmission control module [TCM] [Hybrid only])
- 9 (50A) (no communication with ABS module [Hybrid only])
- 15 (50A) (no communication with TBCM [Hybrid only])
- 18 (20A) (no communication with ABS module [Escape and Mariner only])
- 18 (50A) (no communication with ABS module [Hybrid only])
- 23 (5A) (no communication with TBCM [Hybrid only])
- 27 (10A) (no communication with TCM [Hybrid only])
- 29 (15A) (no communication with PCM)
- Smart junction box (SJB) fuse(s):
- 5 (10A) (no communication with the SJB)
- 11 (10A) (no communication with 4X4 control module)
- 14 (10A) (no communication with front controls interface module [FCIM], front display interface module [FDIM], satellite digital audio receiver system [SDARS] module)
- 15 (10A) (no communication with heating ventilation air conditioning [HVAC] module)
- 20 (15A) (no power to scan tool)
- 26 (10A) (no communication with TBCM [Hybrid only])
- 27 (10A) (no communication with TCM [Hybrid only])
- 29 (5A) (no communication with instrument cluster [IC])
- 31 (10A) (no communication with restraints control module [RCM] [late build])
- 32 (10A) (no communication with [RCM] [early build])
- 34 (5A) (no communication with ABS module [Escape and Mariner only])
- 35 (10A) (no communication with parking aid module [PAM], 4X4 control module, PSCM)
- 37 (10A) (no communication with HVAC module)
- 39 (20A) (no communication with audio control module [ACM])
- 43 (10A) (no communication with the IC)
- Data link connector (DLC)
- 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 R , to diagnose no power to the scan tool.
- Carry out the network test.
- If the network test passes, retrieve and record the continuous memory diagnostic trouble codes (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 Charts. Follow the non-network DTC diagnostics (B-codes, C-codes, P-codes) prior to the network DTC diagnostics (U-codes). 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.