Diagnosis Procedure
- CHECK FUEL INJECTOR POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect fuel injector harness connector.
- Turn ignition switch ON.
- Check the voltage between fuel injector harness connector and ground.
+
-
Voltage
Fuel injector
Cylinder
Connector
Terminal
1
F17
1
Ground
Battery voltage
2
F18
1
3
F19
1
4
F20
1
5
F21
1
6
F22
1
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between fuel injector harness connector and IPDM E/R harness connector.
Fuel injector
IPDM E/R
Continuity
Cylinder
Connector
Terminal
Connector
Terminal
1
F17
1
F50
54
Existed
2
F18
1
60
3
F19
1
54
4
F20
1
60
5
F21
1
54
6
F22
1
60
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit.
NO
Repair or replace error-detected parts.
- CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between fuel injector harness connector and ECM harness connector.
Fuel injector
ECM
Continuity
Cylinder
Connector
Terminal
Connector
Terminal
1
F17
2
F13
17
Existed
2
F18
2
16
3
F19
2
22
4
F20
2
12
5
F21
2
11
6
F22
2
21
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 4.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK FUEL INJECTOR
Check fuel injector. Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 5.
NO
Replace malfunctioning fuel injector. Refer to Removal and Installation .
- CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to Intermittent Incident .
Is the inspection result normal?
YES
Replace IPDM E/R. Refer to Removal and Installation .
NO
Repair or replace error-detected parts.