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Scan Tool Inoperative

  1. Remove scan tool from Data Link Connector (DLC). Connect test light between DLC terminal No. 16 (Orange wire) and ground. See appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS. If test light comes on, go to step  3 . If test light does not come on, go to next step.
  2. Repair open in Orange wire between left instrument panel junction block and DLC. See appropriate wiring diagram in POWER DISTRIBUTION article in WIRING DIAGRAMS. Recheck scan tool operation. If scan tool operates, system is okay at this time. If scan tool does not operate, go to next step.
  3. Connect test light between DLC terminals No. 5 (Black/White wire) and No. 16 (Orange wire). If test light comes on, go to step  5 . If test light does not come on, go to next step.
  4. Repair open in Black/White wire between DLC and ground. See appropriate wiring diagram in GROUND DISTRIBUTION article in WIRING DIAGRAMS. If scan tool operates, system is okay at this time. If scan tool does not operate, go to next step.
  5. Connect test light between DLC terminals No. 4 (Black wire) and No. 16 (Orange wire). If test light comes on, go to next step. If test light does not come on, go to step  7 .
  6. Connect known good scan tool to DLC. If scan tool operates, original scan tool may be defective. Repair scan tool as necessary.
  7. Repair open in Black wire between DLC and ground. If scan tool operates, system is okay at this time. If scan tool does not operate, go to step  6 .
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