Test M: No Module/Network Communication - No Power To NGS Tester
WARNING: This page is about a different car, the 2002 Lincoln Blackwood. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
After making any repair, perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM.
- Turn ignition switch to LOCK position. Inspect NGS tester connector for loose, damaged or corroded terminals. If problem exists with harness connector, repair as necessary. If NGS tester connector is okay, inspect Data Link Connector (DLC) for loose, damaged or corroded terminals. If problem does not exist with harness connector, go to next step. If problem exists with harness connector, repair as necessary.
- Measure voltage between ground and DLC terminal No. 16 (Light Blue/White wire). 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.
- Measure resistance between ground and DLC terminal No. 4 (Black wire). Measure resistance between ground and DLC terminal No. 5 (Black/White wire). If both readings are 5 ohms or less, repair or replace NGS tester. If either resistance reading is more than 5 ohms, repair open in Black wire or Black/White wire between ground and DLC. See WIRING DIAGRAMS .