Expedition 2WD V8-5.4L (2009)
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Refer to Information Bus, No Power To The Scan Tool, to diagnose no power to the scan tool.
5. If the scan tool does not communicate with the vehicle:
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Verify the ignition key is in the ON position.
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Verify the scan tool operation with a known good vehicle.
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Refer to Information Bus to diagnose no response from the PCM.
6. Carry out the network test.
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If the scan tool responds with no communication for one or more modules, refer to Information Bus.
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If the network test passes, retrieve and record the continuous memory DTCs.
7. If the DTCs retrieved are related to the concern, refer to the Diagnostic Trouble Code (DTC) Chart See: Testing and Inspection. For all other
DTCs, refer to the Diagnostic Trouble Code (DTC) Chart in Body Control Systems. See: Body and Frame/Body Control Systems/Testing and
Inspection/Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) Chart
8. If no DTCs related to the concern are retrieved, GO to Symptom Chart. See: Symptom Related Diagnostic Procedures
