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Test H: No Module/Network Communication

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