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Scan Tool Inoperative

NOTE: Data Link Connector (DLC) is unable to provide battery voltage or ground to scan tool.
  1. Check RADIO, HVAC, RFA, CLUSTER, DATA LINK fuse (15-amp) located in fuse block. If fuse is blown, go to next step. If fuse is okay, go to step  3 .
  2. Replace RADIO, HVAC, RFA, CLUSTER, DATA LINK fuse. See appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS. Recheck fuse. If fuse is blown, go to step  9 . If fuse is okay, go to next step.
  3. Connect test light between Data Link Connector (DLC) terminals No. 4 (Black wire) and No. 16 (Orange wire). See appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS. If test light comes on, go to step  7 . If test light does not come on, go to next step.
  4. Connect test light between DLC terminals No. 5 (Black wire) and No. 16 (Orange wire). If test light comes on, go to step  10 . If test light does not come on, go to next step.
  5. Connect test light between DLC terminal No. 16 (Orange wire) and ground. If test light comes on, go to next step. If test light does not come on, go to step  11 .
  6. Connect test light between DLC terminal No. 4 (Black wire) and battery voltage. If test light comes on, go to step  12 . If test light does not come on, go to step  10 .
  7. Connect test light between DLC terminals No. 5 (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  12 .
  8. Connect scan tool to another vehicle. If scan tool operates on another vehicle, go to step  13 . If scan tool does not communicate with another vehicle, go to step  14 .
  9. Repair short to ground in Orange wire between DLC terminal No. 16 and fuse block. After repairs, go to step  15 .
  10. Repair poor connection or open in Black wire between DLC terminal No. 4 and ground. After repairs, go to step  15 .
  11. Repair poor connection or open in Orange wire between DLC terminal No. 16 and fuse block. After repairs, go to step  15 .
  12. Repair poor connection or open in Black wire between DLC terminal No. 5 and ground. After repairs, go to step  15 .
  13. Check for poor connection between scan tool and DLC. If connection is okay, check for faulty scan tool. See scan tool manufactures instructions and repair as necessary. After repairs, go to step  15 .
  14. Check for faulty scan tool. See scan tool manufactures instructions and repair as necessary. After repairs, go to next step.
  15. Turn ignition switch to LOCK position. Connect all disconnected components and connectors. Perform DATA LINK CONNECTOR (DLC) DIAGNOSTIC SYSTEM CHECK  .
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