Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1997EXPLORER 4D UTILITY, 4.0 E, 4WDREPAIR AND DIAGNOSISBODY & FRAMEBODY, CAB CONTROL SYSTEMSMODULE COMMUNICATIONS NETWORKCOMMUNICATION NETWORK DIAGNOSTICSDATA LINK DIAGNOSTICS
1997 Ford Explorer 4D Utility, 4.0 E, 4WD
Data Link Diagnostics
1997 Ford Explorer 4D Utility, 4.0 E, 4WDSECTION Data Link Diagnostics
- Connect New Generation Star (NGS) scan tester on Data Link Connector (DLC) and perform proper hook-up procedure. See EQUIPMENT HOOK-UP .
- Turn ignition on. Rotate dial on scan tester to menu item DIAGNOSTIC DATA LINK and press trigger. A test will be performed on the BUS (circuit No. 914 and 915) for the module communications network and the ISO 9141 communication link (circuit No. 70). This is the Light Blue/White wire that goes between terminal No. 7 on DLC and the air bag diagnostic monitor and other optional modules.
- If scan tester displays CKT 70 = SYSTEM PASSED, ISO 9141 communication link is operating properly. If scan tester does not display CKT 70 = SYSTEM PASSED, go to next step.
- If scan tester displays CKT 70 = 00000000F, go to TEST H: NO MODULE/NETWORK COMMUNICATIONS - ISO 9141 under TESTING . If scan tester does not display CKT 70 = 00000000F, go to next step.
- If scan tester displays CKT 70 = (module of interest listed here) NO RESPONSE/NOT EQUIPPED, go to SYMPTOM INDEX TABLE under SYMPTOM TESTING to continue diagnosis. If scan tester does not display CKT 70 = (module of interest listed here) NO RESPONSE/NOT EQUIPPED, test is passed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.