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Test F: No Module/Network Communication

  1. Turn ignition off. Inspect Data Link Connector (DLC) for physical damage, bent terminals or corrosion. Repair connector as necessary and retest system for normal operation. If connector is okay, go to next step.
  2. Inspect NGS tester connector for loose, damaged or corroded terminals. Repair connector as necessary and retest system for normal operation. If connector is okay, go to next step.
  3. Turn ignition off. Remove and inspect OBD-II fuse (10-amp) from engine compartment fuse block. If fuse is okay, reinstall fuse and go to next step. If fuse is blown, replace fuse and retest system for normal operation. Recheck fuse. If fuse is blown, repair short to ground in circuit No. 180 (Green wire) between engine compartment fuse block and DLC. Retest system for normal operation.
  4. Measure voltage between ground and terminal No. 16 (Green wire) at DLC. See Figure . If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair circuit No. 180 (Green wire) between engine compartment fuse block and DLC. Retest system for normal operation.
  5. Measure resistance between ground and terminals No. 4 (Black wire) and No. 5 (Blue/Orange wire) at DLC. If both resistance readings are 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 or Blue/Orange wire between ground and DLC. Retest system for normal operation.
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