Nissan Quest E52. Manual - part 482

EC-138

< BASIC INSPECTION >

[VQ35DE]

IDLE AIR VOLUME LEARNING

9.

Start engine and let it idle.

10. Wait 20 seconds.

>> GO TO 4.

4.

CHECK IDLE SPEED AND IGNITION TIMING

Rev up the engine 2 or 3 times and check that idle speed and ignition timing are within the specifications.
For procedure, refer to 

EC-455, "Work Procedure"

 and 

EC-456, "Work Procedure"

.

For specifications, refer to 

EC-461, "Idle Speed"

 and 

EC-461, "Ignition Timing"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART-I

Check the following
• Check that throttle valve is fully closed.
• Check PCV valve operation.
• Check that downstream of throttle valve is free from air leakage.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

DETECT MALFUNCTIONING PART-II

Engine component parts and their installation condition are questionable. Check and eliminate the cause of
the incident.
It is useful to perform “TROUBLE DIAGNOSIS - SPECIFICATION VALUE”. Refer to 

EC-155, "Description"

.

If any of the following conditions occur after the engine has started, eliminate the cause of the incident and
perform Idle Air Volume Learning again:
• Engine stalls.
• Incorrect idle.

>> INSPECTION END

SEC897C

MIXTURE RATIO SELF-LEARNING VALUE CLEAR

EC-139

< BASIC INSPECTION >

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MIXTURE RATIO SELF-LEARNING VALUE CLEAR

Description

INFOID:0000000009651001

This describes show to erase the mixture ratio self-learning value. For the actual procedure, follow the instruc-
tions in “Diagnosis Procedure”.

Work Procedure

INFOID:0000000009651002

1.

START

With CONSULT

1.

Start engine and warm it up to normal operating temperature.

2.

Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT.

3.

Clear mixture ratio self-learning value by touching “CLEAR”.

With GST

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF.

3.

Disconnect mass air flow sensor harness connector.

4.

Restart engine and let it idle for at least 5 seconds.

5.

Stop engine and reconnect mass air flow sensor harness connector.

6.

Select Service $03 with GST. Check that DTC P0102 is detected.

7.

Select Service $04 with GST to erase the DTC P0102.

>> END

EC-140

< BASIC INSPECTION >

[VQ35DE]

VIN REGISTRATION

VIN REGISTRATION

Description

INFOID:0000000009651003

VIN Registration is an operation to register VIN in ECM. It must be performed each time ECM is replaced.
NOTE:
Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).

Work Procedure

INFOID:0000000009651004

1.

CHECK VIN

Check the VIN of the vehicle and note it. Refer to 

GI-33, "Information About Identification or Model Code"

.

>> GO TO 2.

2.

PERFORM VIN REGISTRATION

With CONSULT

1.

Turn ignition switch ON with engine stopped.

2.

Select “VIN REGISTRATION” in “WORK SUPPORT” mode.

3.

Follow the instructions on the CONSULT display.

>> END

FUEL PRESSURE

EC-141

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FUEL PRESSURE

Work Procedure

INFOID:0000000009651005

FUEL PRESSURE RELEASE

 With CONSULT

1.

Turn ignition switch ON.

2.

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

3.

Start engine.

4.

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

5.

Turn ignition switch OFF.

 Without CONSULT

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 pres-
sure.

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 this 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 (1) from quick connector.
• Keep fuel hose connections clean.

3.

Install Fuel Pressure Adapter [SST: — (J-44321-6)] (B) and Fuel
Pressure Gauge kit [SST: — (J44321)] (A) as shown in figure.
• Do not distort or bend fuel rail tube when installing fuel pres-

sure 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.

7.

If result is unsatisfactory, go to next step.

JMBIA1659ZZ

At idling

: Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

JMBIA1127ZZ