For Mexico

FUEL INJECTOR

Component Function Check


1. INSPECTION START

Turn ignition switch to START.
Are any cylinders ignited?
YES- GO TO 2.
NO- Proceed to "Diagnosis Procedure" .

2. CHECK FUEL INJECTOR FUNCTION

WITH CONSULT
1.Start engine.
2.Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT.
3.Check 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- Proceed to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK FUEL INJECTOR POWER SUPPLY

1.Turn ignition switch ON.
2.Check the voltage between ECM 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 E46, E94, F22 or F103
- 15 A fuse (No. 87)
- 30 A fuse (No. 71)
- Harness for open or short between ECM and fuse
- Fuel injector relay. Refer to "Component Inspection (Fuel Injector Relay)"
- Repair open circuit, short to ground or short to power in harness or connectors.

3. CHECK FUEL INJECTOR CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect fuel injector harness connector and 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 to power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace error-detected parts.

4. CHECK ECM GROUND CIRCUIT

Check the continuity between ECM harness connector and ground.





Is inspection result normal?
YES- GO TO 5.
NO- Repair or replace error-detected parts.

5. CHECK FUEL INJECTOR

Refer to "Component Inspection (Fuel Injector)" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace malfunctioning fuel injector. Refer to "Removal and Installation" Removal and Installation.


Component Inspection (Fuel Injector)


1. CHECK FUEL INJECTOR

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





Is the inspection result normal?
YES- INSPECTION END
NO- Replace malfunctioning fuel injector. Refer to "Removal and Installation" Removal and Installation.


Component Inspection (Fuel Injector Relay)


1. CHECK FUEL INJECTOR RELAY

1.Turn ignition switch OFF.
2.Remove fuel injector relay.





3.Check the continuity between fuel injector relay terminals under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace fuel injector relay.