PR25DD engine
- CHECK FUSE
- Turn ignition switch OFF.
- Check that the following fuse is not blowing.
Location
Fuse No.
Capacity
Fuse and fusible link holder-1
#67
15A
#74
15A
Is the fuse blown (open)?
YES
Replace the fuse after repairing the applicable circuit.
NO
GO TO 2.
- CHECK FUEL INJECTOR DRIVER POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Turn ignition switch ON.
- Check the voltage between ECM harness connector and ground.
+
-
Voltage
ECM
Connector
Terminal
F91
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
- Remove fuel injector relay.
- Check the continuity between ECM harness connector and fuel injector relay harness connector.
+
-
Continuity
ECM
Fuel injector relay
Connector
Terminal
Connector
Terminal
F91
3
E79
5
Existed
4
7
- Also check harness for short to ground.
Is the inspection result normal?
YES
GO TO 4.
NO
Repair or replace error-detected parts
- CHECK FUEL INJECTOR RELAY POWER SUPPLY (CONTACTOR SIDE)
Check the voltage between fuel injector relay harness connector and ground.
+
-
Voltage
Fuel injector relay
Connector
Terminal
E79
3
Ground
Battery voltage
6
Is the inspection result normal?
YES
GO TO 5.
NO
Perform the trouble diagnosis for power supply circuit.
- CHECK FUEL INJECTOR RELAY POWER SUPPLY (COIL SIDE)
- Reconnect ECM harness connector.
- Turn ignition switch ON.
- Check the voltage between fuel injector relay harness connector and ground.
+
-
Voltage
Fuel injector relay
Connector
Terminal
E79
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 7.
NO
GO TO 6.
- CHECK FUEL INJECTOR RELAY POWER SUPPLY CIRCUIT (COIL SIDE)
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between IPDM E/R harness connector and fuel injector harness connector.
+
-
Continuity
IPDM E/R
Fuel injector relay
Connector
Terminal
Connector
Terminal
F10
73
E79
1
Existed
- Also check harness for short to ground.
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit.
NO
Repair or replace error-detected parts.
- CHECK FUEL INJECTOR RELAY GROUND CIRCUIT
- Turn ignition switch OFF.
- Check the continuity between fuel injector relay harness connector and ground.
+
-
Continuity
Fuel injector relay
Connector
Terminal
E79
2
Ground
Existed
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 8.
NO
Repair or replace error-detected parts.
- CHECK FUEL INJECTOR RELAY
Check the fuel injector relay. Refer to Component Inspection .
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Replace fuel injector relay.
- CHECK ECM GROUND CIRCUIT
- Disconnect ECM harness connectors.
- Check the continuity between ECM harness connector and ground.
ECM
Ground
Continuity
Connector
Terminal
F91
5
Ground
Existed
65
F90
69
70
E31
157
159
162
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 10.
NO
Repair or replace error-detected parts.
- CHECK FUEL INJECTOR CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between fuel injector harness connector and ECM harness connector.
+
-
Continuity
Fuel injector
ECM
Cylinder
Connector
Terminal
Connector
Terminal
1
F17
1
F91
1
Existed
2
8
2
F18
1
2
2
7
3
F19
1
2
2
9
4
F20
1
1
2
6
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
GO TO 11.
NO
Repair or replace error-detected parts.
- CHECK FUEL INJECTOR
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 & Installation .