Fuel Injector Circuit Diagnosis
FUEL INJECTOR CIRCUIT DIAGNOSIS
CIRCUIT DESCRIPTION
The engine control module (ECM) enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The ECM controls each fuel injector by grounding the control circuit via a solid state device called a driver.
DIAGNOSTIC AIDS
- The ODD INJ fuse and the EVEN INJ fuse supplies power to the fuel injectors and the ignition coil/modules. If the ODD INJ fuse is open or the EVEN INJ fuse is open and a short to ground cannot be located, refer to Electronic Ignition (EI) System Diagnosis. Component Tests and General Diagnostics
- Performing the Fuel Injector Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Coil Test. Component Tests and General Diagnostics
- If the condition is intermittent, refer to Intermittent Conditions. Intermittent Conditions
TEST
