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Scan Tool Inoperative

WARNING: This page is about a different car, the 1999 Pontiac Grand Am and 1999 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove scan tool from Data Link Connector (DLC). Connect test light between ground and DLC terminal No. 16 (Orange wire). See appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS. If test light comes on, go to step  3 . If scan tool does not come on, go to next step.
  2. Repair open in Orange wire between DLC and ground. Reconnect scan tool. If scan tool powers up, go to DATA LINK COMMUNICATIONS DIAGNOSTIC SYSTEM CHECK  . If scan tool does not power up, 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 scan tool does not come on, go to next step.
  4. Repair open in Black/White wire between left instrument panel junction block and DLC. Reconnect scan tool. If scan tool powers up, go to DATA LINK COMMUNICATIONS DIAGNOSTIC SYSTEM CHECK  . If scan tool does not power up, 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 scan tool does not come on, go to step  7 .
  6. Scan tool may be inoperative. Check scan tool manufacture's manual. After repairs, go to DATA LINK COMMUNICATIONS DIAGNOSTIC SYSTEM CHECK  .
  7. Repair open in Black wire between DLC and ground. Reconnect scan tool. If scan tool powers up, go to DATA LINK COMMUNICATIONS DIAGNOSTIC SYSTEM CHECK  . If scan tool does not power up, go to step  6 .
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