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Home >> Isuzu >> 1984 >> Impulse Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - ISUZU I-TEC >> Testing >> Power Supply >> Fuel Injector Wiring

Fuel Injector Wiring

  1. Turn ignition "OFF" and unplug harness from ECU. Turn ignition "ON" and check if 12V is present at terminals 21 and 22 of ECU harness connector. These two wires lead to injectors. ECU governs injector ground circuit.
  2. If battery voltage is not present, unplug harness at injectors and check for 12V. If voltage is not present, check dropping resistor, main relay, and starter switch.
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