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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.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Ignition key
    • Ignition switch
    • Multi-function switch
    • Steering column shrouds
    • Battery junction box (BJB) fuse 1 (30A)
    • Central junction box (CJB) fuses:
      • 1 (10A)
      • 2 (10A)
      • 3 (10A)
      • 4 (10A)
      • 5 (7.5A)
      • 6 (10A)
      • 7 (10A)
      • 8 (10A)
      • 9 (7.5A)
      • 11 (15A)
      • 13 (10A)
      • 15 (10A)
      • 17 (10A)
    • Lighting control module (LCM)
    • Wiring, terminals or connectors
  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 DIAGNOSTIC TESTS article, 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 DIAGNOSTIC TESTS article 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 DIAGNOSTIC TESTS article.
    • 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 LCM.
  9. If the DTCs retrieved are related to the concern, go to LIGHTING CONTROL MODULE (LCM) DIAGNOSTIC TROUBLE CODE INDEX . For all other DTCs, refer to DIAGNOSTIC TESTS article.
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
LIGHTING CONTROL MODULE (LCM) DIAGNOSTIC TROUBLE CODE INDEX

DTC Description Source Action
B1352 Ignition Key-In Circuit Failure Lighting Control Module (LCM) REFER to DIAGNOSTIC TESTS article.
B1359 Ignition RUN/ACC Circuit Failure LCM Go to Pinpoint Test B .
B1555 Ignition RUN/START Circuit Failure LCM Go to Pinpoint Test C .
- All other LCM DTCs LCM REFER to the Master DTC Chart in DIAGNOSTIC TESTS article.
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