Circuit Inspection

FUEL INJECTOR [2.7 V6]
The injectors inject fuel according to a signal coming from the ECM.
The amount of fuel injected by the injectors is determined by the time during which the solenoid valve is energized.

Circuit Diagram:

INJECTOR CHECKING

Using Hi-Scan:

Using Hi-Scan:

NOTE
- The injector drive time is when the supply voltage is 11 V and the cranking speed is less than 250 rpm.
- When engine coolant temperature is lower than 0°C (32°F), the ECM fires all four cylinders simultaneously.
- When the vehicle is new (within initial operation of about 500 km [300 miles], the injector drive time may be about 10% longer.

USING STETHOSCOPE AND VOLTMETER

Operation Sound Check




1. Using a stethoscope, check the injectors for clicking sound at idle. Check that the sound is produced at shorter intervals as the engine speed increases.

NOTE: Ensure that the sound from an adjacent injector is not being transmitted along the delivery pipe to an inoperative injector.




2. If a stethoscope is not available, check the injector operation with your finger. If no vibrations are felt, check the wiring connector, injector, or injection signal from ECM.

Resistance Measurement Between Terminals

1. Disconnect the connector at the injector.




2. Measure the resistance between terminals.
Standard value : 13 - 16 Ohm [at 20°C (68°F)]

3. Connect the connector to the injector.

Harness Inspection Procedures: