Explorer 2WD V6-245 4.0L SOHC VIN E EFI (1997)
Multiplex Communication Network: Flow of Diagnosis
Pre Inspection Procedure
The technician should be aware that diagnosis and testing of the Information Bus (Bus) should begin at the Powertrain Management System level, where
testing begins with Diagnosis by Symptom, and is narrowed to testing of a "specific" subsystem and it's related wiring and components. Following the
appropriate diagnostic routines may prevent misdiagnosis and unnecessary component replacement. Refer to Powertrain Management/Testing and
Inspection/Procedures.
Inspection and Verification
INSPECTION AND VERIFICATION
1. Verify the customer concern by operating the system in question.
2. Visually inspect for obvious signs of electrical damage:
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Damaged wiring harness.
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Loose or corroded connections.
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Damaged anti-lock brake control module.
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Damaged Remote Anti-theft Personality (RAP) module.
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Damaged GEM.
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Damaged air bag diagnostic monitor.
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Damaged Powertrain Control Module (PCM).
3. If the concern is not visually evident, determine the symptom and proceed to the System Precheck. See: Initial Inspection and Diagnostic
Overview/System Precheck