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Fuel Injector Circuit

  1. Turn ignition off. Remove cover from below right side of instrument panel for access to ECM. Turn ignition on. At ECM connector E9, measure voltage between chassis ground and terminals No. 7, 8, 9 and 10 (Blue, Red, Black/Yellow and Yellow wires). To identify ECM connectors and terminals, see Figure.
  2. If battery voltage is measured at all terminals, go to next step. If battery voltage is not measured at all terminals, check fusible link AM2 (30-amp). See COMPONENT LOCATIONS  under INTRODUCTION. If fusible link AM2 is open (blown), check for shorted wiring harness. If fusible link AM2 is okay, repair circuit between ECM and battery.
  3. Check ECM ground circuits. See ECM GROUND CIRCUITS  under COMPUTERIZED ENGINE CONTROLS. If ground circuits are okay, measure injector resistance and volume. See FUEL INJECTOR RESISTANCE  and FUEL INJECTOR VOLUME . If resistance and volume are as specified, replace ECM.
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