2004 Nissan-Datsun Frontier Base, AutomaticFACTORY OEM SERVICE PROCEDURE

With GST

NOTE: Start from step  11, if it is possible to confirm that the fuel cannot be drained by 30L (7-7/8 US gal, 6-5/8 lmp gal) in advance.
  1. Prepare a fuel container and a spare hose.
  2. Release fuel pressure from fuel line, refer to , "FUEL PRESSURE RELEASE ".
  3. Remove the fuel feed hose on the fuel level sensor unit.
  4. Connect a spare fuel hose where the fuel feed hose was removed.
  5. Turn ignition switch OFF.
  6. Set voltmeters probe between ECM terminal 46 (fuel level sensor signal) and ground.
  7. Turn ignition switch ON.
  8. Check voltage between ECM terminal 46 and ground and note it.
  9. Drain fuel by 30 l  (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
  10. Fill fuel into the fuel tank for 30 l  (7-7/8 US gal, 6-5/8 Imp gal).
  11. Confirm that the voltage between ECM terminal 46 and ground changes more than 0.03V during step 8 - 10.

    If NG, check component of fuel level sensor, refer to "FUEL LEVEL SENSOR UNIT CHECK ".

Fig 1: Checking Voltage Between ECM Terminal And Ground
G00857309Courtesy of NISSAN MOTOR CO., U.S.A.
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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.