Work Procedure

FUEL PRESSURE RELEASE 

1. FUEL PRESSURE RELEASE 

   With CONSULT

   1. Turn ignition switch ON.
   2. On CONSULT screen, select "ENGINE">>"Active Test" >> "FPCM".
   3. Start engine.
   4. After engine stalls, crank it two or three times to release all fuel pressure.
   5. Turn ignition switch OFF.

   Without CONSULT

   1. Pull out 15 A fuse (No. 34) from IPDM E/R. Refer to IPDM E/R Terminal Arrangement .
   2. Start engine.
   3. After engine stalls, crank it two or three times to release all fuel pressure.
   4. Turn ignition switch OFF.
   5. Reinstall fuel pump fuse after servicing fuel system.

   >>

   INSPECTION END

LOW FUEL PRESSURE CHECK 

NOTE: Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pressure cannot be completely released because this model does not have fuel return system.

1. FUEL PRESSURE CHECK 
   1. Release fuel pressure to zero.
   2. Prepare fuel hose for fuel pressure check (B) and fuel tube adapter [SST: KV10120000 (-) ] (D), then connect fuel pressure gauge (commercial service tool) (A).

      Courtesy of NISSAN NORTH AMERICA, INC.

      	: To quick connector
      	: To fuel tube (engine side)
      C	: Clamp

      CAUTION:

      • Use suitable fuel hose for fuel pressure check (genuine NISSAN fuel hose without quick connector).
      • To avoid unnecessary force or tension to hose, use moderately long fuel hose for fuel pressure check.
      • Do not use the fuel hose for checking fuel pressure with damage or cracks on it.
      • Use Pressure Gauge to check fuel pressure.
   3. Remove fuel hose.
      CAUTION:

      Do not twist or kink fuel hose because it is plastic hose.

   4. Connect fuel hose for fuel pressure check to fuel tube (engine side) with clamp as shown in the figure, below.

      Courtesy of NISSAN NORTH AMERICA, INC.

      CAUTION:

      • Wipe off oil or dirt from hose insertion part using cloth moistened with gasoline.
      • Apply proper amount of gasoline between top of the high pressure fuel pump and spool .
      • Insert fuel hose for fuel pressure check until it touches the spool on high pressure fuel pump.
      • Use NISSAN genuine hose clamp (part number: 16439 N4710 or 16439 40U00).
      • When reconnecting fuel line, always use new clamps.
      • Use a torque driver to tighten clamps.

        Tightening torque

        : 1.3 N.m (0.13 kg-m, 12 in-lb)

      • Install hose clamp to the position within 1 - 2 mm (0.04 - 0.08 in).
      • Make sure that clamp screw does not contact adjacent parts.
      • After connecting fuel hose for fuel pressure check, pull the hose with a force of approximately 98 N (10 kg, 22 lb) to confirm high pressure fuel pump does not come off.
   5. Connect fuel tube adapter to quick connector .

      Courtesy of NISSAN NORTH AMERICA, INC.

      A	: Fuel pressure gauge

   6. Turn ignition switch ON and check for fuel leakage.
   7. Start engine and check for fuel leakage.
   8. Stop the engine.
   9. Turn ignition switch ON and read the indication of fuel pressure gauge.
      CAUTION:

      • Do not perform fuel pressure check with system operating. Fuel pressure gauge may indicate false readings.
      • During fuel pressure check, confirm for fuel leakage from fuel connection every 3 minutes.

      At ignition switch ON

      : Approximately 450 kPa (4.5 bar, 4.59 kg/cm2, 65.25 psi)

   Is the inspection result normal?

   >>

   INSPECTION END

   >>

   GO TO 2.

2. CHECK FUEL HOSES 

   Check the following.

   • Fuel hoses for clogging
   • Fuel filter for clogging
   • Low pressure fuel pump
   • Fuel pressure regulator for clogging

   Is the inspection result normal?

   >>

   Replace fuel pressure regulator.

   >>

   Repair or replace error-detected parts.

HIGH FUEL PRESSURE CHECK 

NOTE: Since the fuel pressure gauge kit cannot be connected, follow the method shown below to check high fuel pressure.

With CONSULT

1. Start engine.
2. Check "FUEL PRES SEN V" in "Data Monitor" mode of "ENGINE".

   Monitor Item	Condition		Values/Status
   FUEL PRES SEN V	Engine: After warming up Selector lever: P or N Air conditioner switch: OFF No load	Idle	1.120 - 1.310 V
   		2000 RPM	1.215 - 1.425 V

Without CONSULT

1. Start engine.
2. Check fuel rail pressure sensor voltage.