Inspection and Verification
WARNING: This page is about a different car, the 2012 Ford Mustang. 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.
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
VISUAL INSPECTION CHARTElectrical - Battery Junction Box (BJB) fuse(s):
- 18 (20A) (no communication with the Body Control Module B (BCM-B))
- 23 (10A) (no communication with the PCM)
- 45 (5A) (no communication with the PCM and the Power Steering Control Module (PSCM))
- 47 (15A) (no communication with the PCM)
- Smart Junction Box (SJB) fuse(s):
- 3 (15A) (no communication with the Accessory Protocol Interface Module (APIM))
- 5 (10A) (no communication with the SJB)
- 14 (10A) (no communication with the Front Controls Interface Module (FCIM), Front Display Interface Module (FDIM), Global Positioning System Module (GPSM))
- 15 (10A) (no communication with the HVAC module)
- 20 (15A) (no power to the scan tool)
- 26 (10A) (no communication with the Instrument Panel Cluster (IPC))
- 31 (10A) (no communication with the Restraints Control Module (RCM))
- 32 (10A) (no communication with the Parking Aid Module (PAM))
- 34 (5A) (no communication with the ABS module)
- 35 (10A) (no communication with the BCM-B)
- 36 (5A) (no communication with the IPC)
- 39 (20A) (no communication with the Audio Control Module (ACM))
- 46 (7.5A) (no communication with the Occupant Classification System Module (OCSM))
- Data Link Connector (DLC)
- Wiring harness
- Wiring, terminals or connectors
- Connect the scan tool to the DLC.
- If the Integrated Diagnostic System (IDS) 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.
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. - If the Integrated Diagnostic System (IDS) does not communicate with the VCM:
- Establish a scan tool session.
- If an IDS session cannot be established with the vehicle, (IDS may state "No communication can be established with the PCM"):
- Choose "NO" when the scan tool prompts whether or not to retry communication.
- Enter either a PCM part number, tear tag or calibration number to identify the vehicle and start a session (the PCM part number and 4-character tear tag are printed on the PCM label).
- GO to PINPOINT TEST A , to diagnose The PCM Does Not Respond To The Scan Tool.
NOTE: The scan tool first attempts to communicate with the PCM, after establishing communication with the PCM, the scan tool then attempts to communicate with all other modules on the vehicle. - If an IDS session cannot be established with the vehicle, (IDS may state "No communication can be established with the PCM"):
- 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 diagnose the failed communication network.
- If a module fails to communicate during the network test, GO to SYMPTOM CHART .
- Retrieve and review the DTCs.
- 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 the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULES .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .