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Test M: No Module/Network Communication - No Power To NGS Tester

NOTE: After making any repair, perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST  under SELF-DIAGNOSTIC SYSTEM.
  1. Inspect NGS tester connector for loose, damaged or corroded terminals. Repair as necessary. If connector is okay, go to next step.
  2. Turn ignition switch to LOCK position. Inspect Data Link Connector (DLC) for loose, damaged or corroded terminals. Repair as necessary. If connector is okay, go to next step.
  3. Measure voltage between DLC terminal No. 16 (Light Blue/White wire) and ground. See Figure. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair Light Blue/White wire between central junction box and DLC.
  4. Measure resistance between DLC terminal No. 4 (Black wire) and ground. Measure resistance between DLC terminal No. 5 (Black/White wire) and ground. If both readings are less than 5 ohms, repair or replace NGS tester. If any resistance reading is 5 ohms or more, repair open in Black wire or Black/White wire between ground and DLC.
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