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Test I: No Module/Network Communication - No Power To NGS Through DLC

  1. Inspect NGS tester connector for loose, damaged or corroded terminals. Repair as necessary and retest system for normal operation. If connector is okay, go to next step.
  2. Turn ignition off. Inspect Data Link Connector (DLC) for physical damage, bent terminals or corrosion. Repair as necessary and retest system for normal operation. If connector is okay, go to next step.
  3. Measure voltage between ground and DLC terminal No. 16 (Orange wire). See Figure. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, check fuse No. 17 (25-amp) in central junction box, located behind left side of instrument panel. Check for open or short in Orange wire between central junction box and DLC. Repair as necessary, then retest system for normal operation.
  4. Measure resistance between ground and DLC terminals No. 4 (Black wire) and No. 5 (Black/White wire). If each resistance reading is less than 5 ohms, repair or replace NGS tester. Retest system for normal operation. If any resistance reading is 5 ohms or more, repair open in Black wire and/or Black/White wire between ground and DLC. Retest system for normal operation.
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