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Data Link Diagnostics

WARNING: This page is about a different car, the 1997 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Ignition switch must be in RUN position or test will fail.
  1. Connect New Generation Star (NGS) scan tester to Data Link Connector (DLC) and perform proper hook-up procedure. See EQUIPMENT HOOK-UP . Turn ignition switch to RUN position. Rotate dial on scan tester to menu item DIAGNOSTIC DATA LINK and press trigger.
  2. A test will be performed on the BUS (circuits 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 Lighting Control Module (LCM), Anti-Lock Brake System (ABS) Module, Air Bag Diagnostic Monitor, Driver's Door Module (DDM), and Driver's Seat Module (DSM).
  3. If scan tester displays CKT 914 (+) = SYSTEM PASSED and CKT 915 (-) = SYSTEM PASSED, module communications network is okay. If scan tester displays CKT 70 = SYSTEM PASSED, ISO 9141 communication link is operating properly.
  4. If scan tester does not display CKT 914 (+) = SYSTEM PASSED, CKT 915 (-) = SYSTEM PASSED and CKT 70 = SYSTEM PASSED, go to COMMUNICATION SYSTEM DIAGNOSTICS .
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