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Home >> Mazda >> 2000 >> B2500 SX, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Module Communications Network) >> Diagnostic Tests >> Test 9: No Module/Network Communication
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Test 9: No Module/Network Communication

WARNING: This page is about a different car, the 1999 Mazda B4000, 1999 Mazda B3000, and 1999 Mazda B2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect NGS tester connector for loose, damaged, or corroded terminals. Repair as necessary and retest system for normal operation. If connector is okay, go to next step.
  2. Turn ignition switch to OFF position. Inspect Data Link Connector (DLC) for damage, bent terminals, or corrosion. Repair as necessary and retest system for normal operation. If connector is okay, go to next step.
  3. Measure voltage between ground and terminal No. 16 (Orange wire) at DLC. See Figure. If voltage is greater than 10 volts, go to next step. If voltage is 10 volts or less, repair open in Orange wire between instrument panel fuse block and DLC. Retest system for normal operation.
  4. Measure resistance between ground and terminal No. 4 (Black wire) and terminal No. 5 (Black/White wire) at DLC. If both resistance readings are 5 ohms or less, repair or replace NGS tester. Retest system for normal operation. If any resistance reading is greater than 5 ohms, repair open in Black wire and/or Black/White wire between ground and DLC. Retest system for normal operation.
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