Explorer Sport Trac 4WD V8-4.6L VIN 8 (2007)
Information Bus: Initial Inspection and Diagnostic Overview
Inspection and Verification
INSPECTION AND VERIFICATION
1. Verify the customer concern.
2. Visually inspect the following for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
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Battery junction box (BJB) fuse(s):
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3 (50A) (no communication with smart junction box [SJB])
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6 (40A) (no communication with anti-lock brake system [ABS] module)
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19 (30A) (no communication with power running board module)
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23 (20A) (no communication with four wheel drive [4WD] control module)
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24 (10A) (no communication with powertrain control module [PCM])
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26 (20A) (no communication with 4WD control module)
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27 (20A) (no communication with transmission control module [TCM])
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33 (30A) (no communication with ABS module)
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39 (15A) (no communication with PCM)
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41 (15A) (no communication with satellite radio receiver, digital versatile disc [DVD])
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Smart junction box (SJB) fuse(s):
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1 (20A) (no communication with driver seat module [DSM])
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2 (5A) (no communication with SJB)
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3 (20A) (no communication with audio unit)
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4 (20A) (no power to scan tool)
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8 (15A) (no communication with instrument cluster)
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9 (2A) (no communication with TCM)
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12 (5A) (no communication with audio unit)
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17 (10A) (no communication with restraints control module [RCM], occupant classification sensor module)
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18 (10A) (no communication with ABS module, 4WD control module, parking aid module)
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20 (10A) (no communication with electronic automatic temperature control [EATC]) module
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24 (10A) (no communication with instrument cluster)
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28 (10A) (no communication with EATC module)
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Data link connector (DLC)
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Wiring harness
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Circuitry
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.
If the cause is not visually evident, connect the scan tool to the DLC.
NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM:
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Check the VCM connection to the vehicle.
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Check the scan tool connection to the VCM.
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GO to Pinpoint Test R, to diagnose no power to the scan tool. See: Pinpoint Tests/Test R: No Power to the Scan Tool
5. NOTE: During the network test, the scan tool will first attempt to communicate with the PCM, after establishing communication with the PCM,
the scan tool will then attempt to communicate with all other modules on the vehicle.
Carry out the network test:
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If the network test passes, retrieve and record the continuous memory DTCs and proceed to Step 6.
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If the network test fails, GO to Symptom Chart to identify the module not communicating. See: Symptom Related Diagnostic Procedures
6. If the DTCs retrieved are related to the concern, go to the Communication Network Diagnostic Trouble Code (DTC) Chart. For all other DTCs,
refer to Body Control Systems (Multifunction Electronic Control Module). See: Diagnostic Trouble Code Descriptions/Module Communications
Network
7. If no DTCs related to the concern are retrieved, GO to Symptom Chart. See: Symptom Related Diagnostic Procedures
Principles of Operation
