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Inspection and Verification

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern by operating the multi-function switch or ignition switch.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Multi-function switch
    • Ignition switch
    • Steering column shrouds
    • Smart junction box (SJB) fuse(s):
      • 27 (20A)
      • 28 (5A)
      • 43 (10A)
      • 45 (5A)
    • Wiring, terminals or connectors
    • Instrument cluster
    • Passive anti-theft system (PATS) module
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
    4. NOTE: Make sure to use the latest scan tool software release.
  4. If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
    5. NOTE: The vehicle communication module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM.
  5. 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.
    • refer to MODULE COMMUNICATIONS NETWORK , No Power To The Scan Tool, to diagnose no communication with the scan tool.
  6. If the scan tool does not communicate with the vehicle:
    • verify the ignition key is in the ON position.
    • verify the scan tool operation with a known good vehicle.
    • refer to MODULE COMMUNICATIONS NETWORK to diagnose no response from the PCM.
  7. Carry out the network test.
    • If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK .
    • If the network test passes, retrieve and record continuous memory DTCs.
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the SJB.
  9. If the DTCs retrieved are related to the concern, go to Smart Junction Box (SJB) DTC Chart. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES .
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
SMART JUNCTION BOX (SJB) DTC CHART

DTC Description Source Action
B2A20 Ignition stuck in START Smart junction box (SJB) Go to Pinpoint Test E .
B2844 Ignition fault SJB Go to Pinpoint Test F .
U2472 Unexpected Ignition State SJB Go to Pinpoint Test F .
- All Other SJB DTCs SJB REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULES .
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