Ranger 4WD L4-140 2.3L VIN A EFI (1997)
Multiplex Communication Network: Flow of Diagnosis
Inspection and Verification
1. Verify the customer's original concern.
2. Inspect to determine if one of the following electrical concerns apply:
Electrical
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check electrical connections for obvious damage, opens or shorts
3. Inspect Pin 2, Pin 7 and Pin 10 on the Data Link Connector (DLC) for loose, bent, deformed, corroded or broken pins. If pin is damaged, service
or replace pin, verify communication with Rotunda New Generation STAR Tester 007-00500 or equivalent.
4. If the concern(s) remains after the inspection, continue with New Generation STAR Tester Driven Diagnostics. See: Scan Tool Testing and
Procedures/New Generation Star (NGS) Tester Driven Diagnostics
