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Home >> Mazda >> 2003 >> B2300 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (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 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. 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. 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 DLC connector terminals No. 4 (Black wire) and No. 5 (Black/White wire). 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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