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Fuel Injector Circuit Tests: LOYALE

  1. Check Fuel Injector Operation  - Verify injector operation using a stethoscope or screwdriver to hear operating sounds while engine is cranked. If operating sounds are not heard, go to next step. If operating sounds are heard, verify fuel pressure. See FUEL PRESSURE  under FUEL SYSTEM.
  2. Check Fuel Injector Resistance  - Disconnect each injector connector. Verify less than 2 ohms resistance between injector terminals No. 1 and 2. If specified resistance is present, go to next step. If specified resistance is not present, replace fuel injector(s).
  3. Check Injector Harness Resistance  - Verify more than one megohm of resistance between each terminal of injector side of connector and ground. If resistance is not as specified, replace injector(s). If resistance is as specified, replace ECU.
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