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Scan Tool Inoperative

  1. Remove scan tool from Data Link Connector (DLC). Test for continuity with DVOM between DLC terminal No. 16 and ground. If there is no continuity, go to next step. If there is continuity, go to step  3.
  2. Repair open in Orange 840 circuit wire between instrument panel fuse block and DLC terminal No. 16. If scan tool is not operative, go to next step. If scan tool is operative, perform data link communications system check. See DATA LINK COMMUNICATIONS SYSTEM CHECK .
  3. Test for continuity with DVOM between DLC terminals No. 5 and 16. If there is no continuity, go to next step. If there is continuity, go to step  5.
  4. Repair open in Black/White 451 circuit wire or Tan/White 551 circuit wire between DLC terminal No. 5 and ground G101 or G103. If scan tool is not operative, go to next step. If scan tool is operative, perform data link communications system check. See DATA LINK COMMUNICATIONS SYSTEM CHECK .
  5. Test for continuity with DVOM between DLC terminals No. 4 and 16. If there is continuity, go to next step. If there is no continuity, go to step  7.
  6. See SCAN TOOL DOES NOT COMMUNICATE WITH COMPONENTS . If scan tool is not operative, go to next step. If scan tool is operative, perform data link communications system check. See DATA LINK COMMUNICATIONS SYSTEM CHECK .
  7. Repair open in Black 150 circuit wire between DLC terminal No. 4 and ground G201. Perform data link communications system check. See DATA LINK COMMUNICATIONS SYSTEM CHECK .
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