Nissan Altima 2007-2012 Service Manual: Fuel pressure

Inspection

FUEL PRESSURE RELEASE

1. Turn ignition switch ON.

2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode with CONSULT-III.

3. Start engine.

4. After engine stalls, crank it 2 or 3 times to release all fuel pressure.

5. Turn ignition switch OFF.

1. Remove fuel pump fuse (2) located in IPDM E/R (1).

2. Start engine.

3. After engine stalls, crank it 2 or 3 times to release all fuel pressure.

4. Turn ignition switch OFF.

5. Reinstall fuel pump fuse after servicing fuel system.

FUEL PRESSURE CHECK

CAUTION: Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.

NOTE: • Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pressure cannot be completely released because L32 models do not have fuel return system.

• Be careful not to scratch or get the fuel hose connection area dirty when servicing, so that the quick connector o-ring maintains seal ability.

• Use Fuel Pressure Gauge Kit [SST (J-44321)] and Fuel Pressure Adapter [SST (J-44321-6)] to check fuel pressure.

1. Release fuel pressure to zero.

2. Remove fuel hose using Quick Connector Release [SST (J-45488)].

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

• Do not remove fuel hose from quick connector.

• Keep fuel hose connections clean.

3. Install Fuel Pressure Adapter [SST (J-44321-6)] and Fuel Pressure Gauge kit [SST (J44321)] as shown in figure.

• Do not distort or bend fuel rail tube when installing fuel pressure gauge adapter.

• When reconnecting fuel hose, check the original fuel hose for damage and abnormality.

4. Turn ignition switch ON (reactivate fuel pump) and check for fuel leakage.

5. Start engine and check for fuel leakage.

6. Read the indication of fuel pressure gauge kit [SST (J-44321)].

• During fuel pressure check, check for fuel leakage from fuel connection every 3 minutes.

At idling : Approximately 350 kPa (3.57 kg/cm2, 51 psi)

7. If result is unsatisfactory, go to next step.

8. Check the following.

• Fuel hoses and fuel tubes for clogging

• Fuel filter for clogging

• Fuel pump

• Fuel pressure regulator for clogging

9. If OK, replace fuel pressure regulator.

If NG, repair or replace malfunctioning part.

10. Before disconnecting Fuel Pressure Gauge kit [SST (J-44321)] and Fuel Pressure Adapter [SST (J- 44321-6)], release fuel pressure to zero.

    Evap leak check
    Inspection CAUTION: • Never use compressed air or a high pressure pump. • Never exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in EVAP system. NOTE: • Do not start engine. • I ...

    Other materials:

    Precaution
    Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the dr ...

    P2118 throttle control motor
    Description The throttle control motor is operated by the ECM and it opens and closes the throttle valve. The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM to control the throttle control motor to make the throttl ...

    BCM branch line circuit
    Diagnosis Procedure INSPECTION PROCEDURE 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and connector side). Is the inspec ...