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Test H: No Module/Network Communication - All Modules

  1. Inspect New Generation Star (NGS) tester for damaged pins. If no damage is found, go to next step. If damage is found, repair as necessary. Retest system operation.
  2. Inspect Data Link Connector (DLC) for damaged pins. If no damage is found, go to next step. If damage is found, repair as necessary. Retest system operation.
  3. Measure voltage between ground and DLC terminal No. 16 (Orange/Light Green wire). See Figure . If voltage is 10 volts or more, go to next step. If voltage is less than 10 volts, repair power distribution circuit(s) as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS. Retest system operation.
  4. Measure resistance between ground and DLC terminals No. 4 (Black wire) and DLC No. 5 (Black/White wire). See Figure . If both resistances are less than 5 ohms, repair NGS tester as necessary. Refer to scan tool manufacturer's instructions. If either resistance is 5 ohms or more, repair open in Black wire and/or Black/White wire. Retest system operation.
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