DTC Diagnosis Procedure
- CHECK FUEL PUMP RELAY POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Turn ignition switch ON.
- Check the voltage between ECM harness connector terminals.
ECM
Voltage
Connector
+
Connector
-
Terminal
Terminal
F92
93
E20
152
Battery voltage
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
+
-
Continuity
ECM
IPDM E/R
Connector
Terminal
Connector
Terminal
F92
93
E13
31
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 FPCM POWER SUPPLY
- Turn ignition switch OFF.
- Reconnect ECM harness connector.
- Disconnect FPCM harness connector.
- Turn ignition switch ON.
- Check the voltage between FPCM harness connector and ground.
FPCM
Ground
Voltage
Connector
Terminal
B1
6
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 4.
- CHECK FPCM POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between FPCM harness connector and IPDM E/R harness connector.
+
-
Continuity
FPCM
IPDM E/R
Connector
Terminal
Connector
Terminal
B1
6
E15
54
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 FPCM GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Check the continuity between FPCM harness connector and ground.
FPCM
Ground
Continuity
Connector
Terminal
B1
3
Ground
Existed
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 6.
NO
Repair open circuit or short to power in harness or connectors.
- CHECK FPCM INPUT AND OUTPUT CIRCUITS FOR OPEN AND SHORT
- Disconnect ECM harness connector.
- Check the continuity between FPCM harness connector and ECM harness connector.
FPCM
ECM
Continuity
Connector
Terminal
Connector
Terminal
B1
4
E20
130
Existed
5
136
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 8.
NO
GO TO 7.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness for open or short between FPCM and ECM
- Loose or poor connection for each connector and harness
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK FUEL PUMP CONTROL CIRCUIT FOR OPEN AND SHORT
- Disconnect fuel level sensor unit and fuel pump harness connector.
- Check the continuity between FPCM harness connector and fuel level sensor unit and fuel pump harness connector.
FPCM
Fuel level sensor unit and fuel pump
Continuity
Connector
Terminal
Connector
Terminal
B1
1
C5
1
Existed
2
3
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 9.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK FPCM
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 10.
NO
Replace FPCM.
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
INSPECTION END