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Home › Ford › 2012 › Fiesta SES, Automatic DCT Trans › Repair and Diagnosis › Accessories & Equipment › Communication Devices › Module Communications Network › Diagnosis And Testing › Communications Network › Inspection and Verification

Inspection and Verification

  1. Verify the customer concern.
  2. 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 CHART

    Electrical
    • Battery Junction Box (BJB) fuse(s):
      • 1 (40A) (ABS module)
      • 2 (50A) (Transmission Control Module (TCM))
      • 9 (20A) (ABS module)
      • 22 (15A) (PCM)
      • 32 (7.5A) (PCM, TCM)
    • Central Junction Box (CJB) fuse(s):
      • 1 (15A) (Remote Function Actuator (RFA) module)
      • 3 (7.5A) (Instrument Panel Cluster (IPC))
      • 4 (7.5A) (Occupant Classification System Module (OCSM))
      • 5 (15A) (no power to scan tool)
      • 7 (7.5A) (Front Control/Display Interface Module (FCDIM))
      • 9 (20A) (RFA module)
      • 10 (15A) (Audio Front Control Module (ACM), Accessory Protocol Interface Module (APIM), Global Positioning System Module (GPSM))
      • 12 (20A) (Tire Pressure Monitor (TPM) /Vehicle Security Module (VSM))
      • 14 (20A) (RFA module)
      • 19 (7.5A) (ACM, IPC)
      • 20 (10A) (Restraints Control Module (RCM))
      • 21 (10A) (Body Control Module (BCM), IPC, Power Steering Control Module (PSCM))
      • 22 (7.5A) (ABS module, PCM)
      • 23 (10A) (TCM, TPM/VSM)
      • 26 (7.5A) (TPM/VSM)
    • Data Link Connector (DLC)
    • Wiring, terminals or connectors
  3. Connect the scan tool to the DLC.
      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 :
      • 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.
  4. Establish a scan tool session.
      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"):
      • 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.
  5. 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 .
  6. 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).
    • If no DTCs related to the concern are retrieved, GO to Symptom Chart .
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