Fuel Injector

FUEL INJECTOR

Component Function Check


1. INSPECTION START

Turn ignition switch to START.
Are any cylinders ignited?
YES- GO TO 2.
NO- Go to .

2. CHECK FUEL INJECTOR FUNCTION

With CONSULT
1.Start engine.
2.Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT.
3.Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT
1.Start engine.





2.Listen to each fuel injector operating sound.
Clicking sound should be heard.
Is the inspection result normal?
YES- INSPECTION END
NO- Go to .


Diagnosis Procedure


1. CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect fuel injector harness connector.
3.Turn ignition switch ON.
4.Check the voltage between fuel injector harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors E20, F40
- Harness connectors F30, F120
- IPDM E/R harness connector E7
- 10 A fuse (No. 44)
- Harness for open or short between fuel injector and fuse
- Repair open circuit, short to ground or short to power in harness or connectors.

3. CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between fuel injector harness connector and ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4

4. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors F30, F120
- Harness for open or short between fuel injector and ECM
- Repair open circuit, short to ground or short to power in harness or connectors.

5. CHECK FUEL INJECTOR

.
Is the inspection result normal?
YES- GO TO 6.
NO- Replace malfunctioning fuel injector. Exploded View.

6. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
Is the inspection result normal?
YES- Replace IPDM E/R. IPDM E/R.
NO- Repair open circuit, short to ground or short to power in harness or connectors.


Component Inspection


1. CHECK FUEL INJECTOR

1.Turn ignition switch OFF.
2.Disconnect fuel injector harness connector.
3.Check resistance between fuel injector terminals as follows.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace malfunctioning fuel injector. Exploded View.