Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Infiniti I35FACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure

CHECK FUEL TANK TEMPERATURE SENSOR
1. Remove fuel level sensor unit.
2. Check resistance between fuel level sensor unit and fuel pump terminals 4 and 5 by heating with hot water or heat gun as shown in Fig 1 .
  
  Fig 1: Checking Fuel Tank Temperature Sensor
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
1. OK: GO TO 2.
2. NG: Replace fuel level sensor unit.
CHECK INTERMITTENT INCIDENT
- Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
- Refer to WIRING DIAGRAM .
1. : INSPECTION END

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

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