Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK GROUND CONNECTIONS
- Turn ignition switch OFF.
- Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".
OK or NG
- OK: GO TO 2.
- NG: Repair or replace ground connections.
- CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
- Disconnect "fuel level sensor unit and fuel pump" harness connector.
- Turn ignition switch ON.
- Check voltage between "fuel level sensor unit and fuel pump" terminal 4 and ground with CONSULT-II or tester.
- Voltage: Approximately 5V
OK or NG
- OK: GO TO 4.
- NG: GO TO 3.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M72, F102
- Harness connectors B1, M12
- Harness for open or short between ECM and "fuel level sensor unit and fuel pump"
- : Repair open circuit or short to ground or short to power in harness or connector.
- CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect "unified meter and A/C amp." harness connector M49.
- Check harness continuity between "fuel level sensor unit and fuel pump" terminal 5 and "unified meter and A/C amp." terminal 36. Refer to WIRING DIAGRAM .
- Continuity should exist.
- Also check harness for short to power.
OK or NG
- OK: GO TO 6.
- NG: GO TO 5.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors B1, M12
- Harness for open or short between "fuel level sensor unit and fuel pump" and "unified meter and A/C amp."
- : Repair open circuit or short to ground or short to power in harness or connector.
- CHECK FUEL TANK TEMPERATURE SENSOR
Refer to "COMPONENT INSPECTION ".
OK or NG
- OK: GO TO 7.
- NG: Replace fuel level sensor unit.
- CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
- : INSPECTION END