ECT Between 10-35 Degrees C (50-95 Degrees F)

Diagnostic Chart:

CIRCUIT DESCRIPTION
The PCM controls the fuel injector control circuit using a Multifunction Driver (MFD). Power is supplied from the injector fuse to the injector and is grounded by the PCM. The MFD controls the injector ground, allowing fuel flow to pulse.

DIAGNOSTIC AIDS
Test the engine fuel injection harness for the following conditions:
^ Poor Terminal Connection-Inspect the harness connectors for the following conditions:
- Backed out terminals
- Improper mating
- Broken locks
- Improperly formed or damaged terminals
- Faulty terminal to wire connection- Use a corresponding mating terminal to test for proper tension.
^ Intermittents-Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Diagrams.
^ Damaged harness-Inspect the wiring harness for damage. Refer to Wiring Repairs in Diagrams.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. The engine coolant temperature affects the resistance in the fuel injector and the ability of the fuel injector tester to detect a faulty fuel injector. If the engine coolant temperature is between the specified value, go to Fuel Injection Coil Test - ECT Between 10°C-35°C.
3. The first second of the voltage displayed by the DMM may be inaccurate due to the initial current surge. Therefore, record the lowest voltage displayed by the DMM after the first second. The voltage displayed by the DMM should be within the specified value (refer to the Example). The voltage displayed by the DMM may increase throughout the test as the fuel injectors windings warm and the resistance changes. An erratic reading indicates an intermittent connection within the fuel injector and the fuel injector must be replaced. A fuel injector outside the specified value is considered faulty and must be replaced.