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Inspection and Verification

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. 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
    • Interior lamps
    • Map lamps
    • Cargo lamp
    • Door ajar switches (part of the door latches)
    • Liftgate ajar switch (part of the liftgate latch)
    • Liftgate glass ajar switch (part of the liftgate window latch)
    • Vanity lamps
    • Battery junction box (BJB) fuse(s):
      • 2 (25A)
      • 3 (25A)
    • Smart junction box (SJB)
    • Circuitry
    • Interior lamp
    • Map lamp
    • Cargo lamp
    • Vanity lamps
  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 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 MODULE COMMUNICATIONS NETWORK article to diagnose no response from the powertrain control module (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 article.
    • 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
B1314 Battery Saver Relay Coil Circuit Open Go to Pinpoint Test A .
B1316 Battery Saver Relay Coil Shorted To Ground Go to Pinpoint Test A .
B1319 Driver Door Ajar Circuit Failure Go to Pinpoint Test B .
B1327 Passenger Door Ajar Circuit Failure Go to Pinpoint Test B .
B1335 Door Ajar RR Circuit Failure Go to Pinpoint Test B .
B1342 ECU Is Defective CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved again, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
B1372 Illuminated Entry Relay Circuit Open Go to Pinpoint Test A .
B1374 Illuminated Entry Relay Short To Ground Go to Pinpoint Test B .
B1474 Battery Saver - Interior Lighting Power Circuit Short To Battery Go to Pinpoint Test A .
B1571 Door Ajar LR Circuit Failure Go to Pinpoint Test B .
B2077 Liftgate Ajar Switch Circuit Failure Go to Pinpoint Test B .
B2902 Rear Window Ajar Switch Circuit Failure Go to Pinpoint Test B .
All other DTCs - REFER to MULTIFUNCTION ELECTRONIC MODULES article.
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