Diagnosis Procedure
- CHECK FUSE
- Turn ignition switch OFF.
- Check that the following fuse is not blowing.
Fuse No.
Capacity
No. 60
10 A
No. 64
15 A
Is the fuse blown (open)?
YES
Replace the fuse after repairing the applicable circuit.
NO
GO TO 2.
- CHECK FUEL INJECTOR DRIVER POWER SUPPLY
- Disconnect ECM harness connector.
- Turn ignition switch ON.
- Check the voltage between ECM harness connector and ground.
+
-
Voltage
ECM
Connector
Terminal
F24
3
Ground
Battery voltage
4
Is the inspection result normal?
YES
GO TO 9.
NO
GO TO 3.
- CHECK FUEL INJECTOR DRIVER POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Disconnect direct fuel injector relay 1 and 2 harness connector.
- Check the continuity between ECM harness connector and direct fuel injector relay 1 and 2 harness connector.
ECM
Direct fuel injector relay 1 and 2
Continuity
Connector
Terminal
Connector
Terminal
F24
3
F60
2
Existed
4
7
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 4.
NO
Repair or replace malfunctioning part.
- CHECK DIRECT FUEL INJECTOR RELAY 1 AND 2 POWER SUPPLY (CONTACT SIDE)
Check the voltage between fuel injector relay harness connector and ground.
+
-
Voltage
Direct fuel injector relay 1 and 2
Connector
Terminal
F60
1
Ground
Battery voltage
6
Is the inspection result normal?
YES
GO TO 5.
NO
Perform trouble diagnosis for power supply circuit.
- CHECK DIRECT FUEL INJECTOR RELAY 1 AND 2 POWER SUPPLY (EXCITATION COIL SIDE)
- Install all removed parts.
- Turn ignition switch ON.
- Check the voltage between direct fuel injector relay 1 and 2 harness connector and ground.
+
-
Voltage
Direct fuel injector relay 1 and 2
Connector
Terminal
F60
3
Ground
Battery voltage
8
Is the inspection result normal?
YES
GO TO 7.
NO
GO TO 6.
- CHECK DIRECT FUEL INJECTOR RELAY 1 AND 2 POWER SUPPLY CIRCUIT (EXCITATION COIL SIDE)
- Turn ignition switch OFF.
- Disconnect direct fuel injector relay 1 and 2 harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between IPDM E/R harness connector and fuel injector relay harness connector.
IPDM E/R
Direct fuel injector relay 1 and 2
Continuity
Connector
Terminal
Connector
Terminal
F96
73
F60
3
Existed
8
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
Perform trouble diagnosis for power supply circuit.
NO
Repair or replace malfunctioning part.
- CHECK FUEL INJECTOR RELAY GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect fuel injector relay harness connector.
- Check the continuity between direct fuel injector relay 1 and 2 harness connector and ground.
Direct fuel injector relay 1 and 2
--
Continuity
Connector
Terminal
F60
4
Ground
Existed
9
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 8.
NO
Repair or replace malfunctioning part.
- CHECK DIRECT FUEL INJECTOR RELAY 1 AND 2
Refer to Component Inspection .
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Replace direct fuel injector relay 1 and 2.
- CHECK ECM GROUND CIRCUIT
- Turn ignition switch OFF.
- Check the continuity between ECM harness connector and ground.
ECM
--
Continuity
Connector
Terminal
F24
5
Ground
Existed
65
F25
69
E16
157
159
162
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 10.
NO
Repair or replace malfunctioning part.
- CHECK FUEL INJECTOR GROUND CIRCUIT
- 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
F18
2
F24
8
Existed
2
F19
2
7
3
F20
2
9
4
F21
2
6
- Also check harness for short to ground.
Is the inspection result normal?
YES
GO TO 11.
NO
Repair or replace malfunctioning part.
- CHECK FUEL INJECTOR
Refer to Component Inspection .
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Replace malfunctioning fuel injector. Refer to Removal and Installation .