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Inspection and Verification

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect the following for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Headlamp switch
    • Multifunction switch
    • Smart junction box (SJB) fuse(s):
      • 3 (10A) (RH low beam)
      • 4 (10A) (LH low beam)
      • 14 (15A) (high beams)
      • 23 (30A) (headlamp switch and multifunction switch)
    • Circuitry
    • Bulb(s)
    • SJB
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
    NOTE: Make sure the headlamp switch is in the OFF position.
    NOTE: Make sure the multifunction switch is in the LOW BEAM position.
    4. NOTE: Make sure to use the latest scan tool software.
  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 connection to the vehicle.
    • Check the scan tool connection to the VCM.
  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.
  7. Carry out the network test.
    • If the network test passes, retrieve and record the 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 the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
    SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) INDEX

    DTC Description Action
    B1342 ECU is Faulted CLEAR the DTCs. CARRY OUT the on-demand self-test. If DTC B1342 is retrieved again, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
    B1470 Lamp Headlamp Input Circuit Failure Go to Pinpoint Test E .
    B1569 Lamp Headlamp High-Beam Circuit Short to Battery Go to Pinpoint Test E .
    All other DTCs - REFER to MULTIFUNCTION ELECTRONIC MODULES article.
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