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Data Link Diagnostics

  1. Connect New Generation Star (NGS) scan tester on Data Link Connector (DLC) and perform proper hook-up procedure. See EQUIPMENT HOOK-UP under COMMUNICATION NETWORK DIAGNOSTICS  .
  2. Turn ignition switch to ON position. Rotate dial on scan tester to menu item DIAGNOSTIC DATA LINK and press trigger. 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 the Passenger's Seat Module (PSM).
  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, proceed testing for module communication network failure. See COMMUNICATION NETWORK FAILURE  under TESTING.
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