Taurus FWD V6-3.5L (2008)
Information Bus: Initial Inspection and Diagnostic Overview
Inspection and Verification
INSPECTION AND VERIFICATION
1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
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Battery junction box (BJB) fuse(s):
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23 (10A) (no communication with the PCM)
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29 (30A) (no communication with the power liftgate module)
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32 (30A) (no communication with the driver seat module [DSM])
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38 (10A) (no communication with the ABS module)
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47 (15A) (no communication with the PCM)
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SJB fuse(s):
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3 (15A) (no communication with the satellite radio receiver, digital versatile disc [DVD] player)
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5 (10A) (no communication with the smart junction box [SJB])
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11 (10A) (no communication with the four wheel drive [4WD] control module)
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12 (7.5A) (no communication with the DSM)
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13 (5A) (no communication with the power steering control module)
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14 (10A) (no communication with the power liftgate module)
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15 (10A) (no communication with the electronic automatic temperature control [EATC] or electronic manual temperature control [EMTC]
module)
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20 (15A) (no power to scan tool)
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26 (10A) (no communication with the instrument cluster)
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29 (5A) (no communication with the instrument cluster)
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32 (10A) (no communication with the restraints control module [RCM])
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35 (10A) (no communication with the parking aid module [PAM], power steering control module)
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37 (10A) (no communication with the EATC/EMTC module)
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39 (20A) (no communication with the audio unit)
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41 (15A) (no communication with the audio unit)
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46 (7.5A) (no communication with the RCM, occupant classification sensor [OCS] module)
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Data link connector (DLC)
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Wiring harness
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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.
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 P, to diagnose no power to the scan tool. See: Pinpoint Tests/Test P: 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 DTC Charts. 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
