Nissan Murano Z50 (2003 year). Manual - part 121

 

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Nissan Murano Z50 (2003 year). Manual - part 121

 

 

EVAPORATIVE EMISSION SYSTEM

EC-655

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Component Inspection

ABS004PC

EVAP CANISTER

Check EVAP canister as follows:

1.

Block port B .

2.

Blow air into port A  and check that it flows freely out of port C .

3.

Release blocked port B .

4.

Apply vacuum pressure to port B  and check that vacuum pres-
sure exists at the ports A  and C . 

5.

Block port A  and B .

6.

Apply pressure to port C  and check that there is no leakage.

FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP)

1.

Wipe clean valve housing.

2.

Check valve opening pressure and vacuum.

3.

If out of specification, replace fuel filler cap as an assembly.

CAUTION:

Use only a genuine fuel filler cap as a replacement. If an incor-
rect fuel filler cap is used, the MIL may come on.

EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-361

 .

FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-303

 .

EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-368

 .

EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-378

 .

PBIB1044E

SEF445Y

Pressure:

15.3 - 20.0 kPa (0.156 - 0.204 kg/cm

2

 , 2.22 

- 2.90 psi)

Vacuum:

6.0 to 

3.3 kPa (

0.061 to 

0.034 kg/cm

2

 , 

0.87 to 

0.48 psi)

SEF943S

EC-656

EVAPORATIVE EMISSION SYSTEM

Revision; 2004 April

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EVAP SERVICE PORT

Positive pressure is delivered to the EVAP system through the EVAP
service port. If fuel vapor leakage in the EVAP system occurs, use a
leak detector to locate the leak.

Removal and Installation

ABS004PD

EVAP CANISTER

Tighten EVAP canister as shown in the figure.

EVAP CANISTER VENT CONTROL VALVE

1.

Turn EVAP canister vent control valve counterclockwise.

2.

Remove the EVAP canister vent control valve.

Do not reuse the O-ring, replace it with a new one.

How to Detect Fuel Vapor Leakage

ABS004PE

CAUTION:

Never use compressed air or a high pressure pump.

Do not exceed 4.12 kPa (0.042 kg/cm

2

 , 0.6 psi) of pressure in EVAP system.

NOTE:

Do not start engine.

Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.

SEF462UA

PBIB1383E

PBIB1384E

EVAPORATIVE EMISSION SYSTEM

EC-657

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 WITH CONSULT-II

1.

Attach the EVAP service port adapter securely to the EVAP service port.

2.

Also attach the pressure pump and hose to the EVAP service port adapter.

3.

Turn ignition switch “ON”.

4.

Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT
MODE” with CONSULT-II.

5.

Touch “START”. A bar graph (Pressure indicating display) will
appear on the screen.

6.

Apply positive pressure to the EVAP system until the pressure
indicator reaches the middle of the bar graph.

7.

Remove EVAP service port adapter and hose with pressure
pump.

8.

Locate the leak using a leak detector. Refer to 

EC-653, "EVAP-

ORATIVE EMISSION LINE DRAWING"

 .

 WITHOUT CONSULT-II

1.

Attach the EVAP service port adapter securely to the EVAP ser-
vice port.

2.

Also attach the pressure pump with pressure gauge to the EVAP
service port adapter.

PEF838U

PEF917U

SEF200U

SEF462UA

EC-658

EVAPORATIVE EMISSION SYSTEM

Revision; 2004 April

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3.

Apply battery voltage to between the terminals of EVAP canister vent control valve to make a closed
EVAP system.

4.

To locate the leak, deliver positive pressure to the EVAP system until pressure gauge points reach 1.38 to
2.76 kPa (0.014 to 0.028 kg/cm

2

 , 0.2 to 0.4 psi).

5.

Remove EVAP service port adapter and hose with pressure pump.

6.

Locate the leak using a leak detector. Refer to 

EC-653, "EVAPORATIVE EMISSION LINE DRAWING"

 .

PBIB1365E

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-659

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ON BOARD REFUELING VAPOR RECOVERY (ORVR)

PFP:00032

System Description

ABS004PF

From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is
released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and
refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged
during driving.

WARNING:

When conducting inspections below, be sure to observe the following:

Put a “CAUTION: INFLAMMABLE” sign in workshop.

Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.

Be sure to furnish the workshop with a CO

2

  fire extinguisher.

CAUTION:

Before removing fuel line parts, carry out the following procedures:

Put drained fuel in an explosion-proof container and put lid on securely.

Release fuel pressure from fuel line. Refer to “Fuel Pressure Release”, 

EC-66

 .

Disconnect battery ground cable.

Always replace O-ring when the fuel gauge retainer is removed.

Do not kink or twist hose and tube when they are installed.

Do not tighten hose and clamps excessively to avoid damaging hoses.

After installation, run engine and check for fuel leaks at connection.

Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.

PBIB1387E

EC-660

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

Revision; 2004 April

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Diagnostic Procedure

ABS004PG

SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.

1. 

CHECK EVAP CANISTER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

Does water drain from the EVAP canister?
Yes or No

Yes

>> GO TO 3.

No

>> GO TO 5.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose.

5. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-662, "Component Inspection"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Replace refueling EVAP vapor cut valve with fuel tank.

PBIB1381E

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-661

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SYMPTOM: CANNOT REFUEL/FUEL ODOR FROM THE FUEL FILLER OPENING IS STRONG 
WHILE REFUELING.

1. 

CHECK EVAP CANISTER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

Does water drain from the EVAP canister?

Yes or No

Yes

>> GO TO 3.

No

>> GO TO 5.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose.

5. 

CHECK VENT HOSES AND VENT TUBES

Check hoses and tubes between EVAP canister and refueling EVAP vapor cut valve for clogging, kink, loose-
ness and improper connection.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace hoses and tubes.

6. 

CHECK FILLER NECK TUBE

Check recirculation line for clogging, dents and cracks. 

OK or NG

OK

>> GO TO 7.

NG

>> Replace filler neck tube.

PBIB1381E

EC-662

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

Revision; 2004 April

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7. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-662, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Replace refueling EVAP vapor cut valve with fuel tank.

8. 

CHECK FUEL FILLER TUBE

Check filler neck tube and hose connected to the fuel tank for clogging, dents and cracks.

OK or NG

OK

>> GO TO 9.

NG

>> Replace fuel filler tube.

9. 

CHECK ONE-WAY FUEL VALVE-I

Check one-way valve for clogging.

OK or NG

OK

>> GO TO 10.

NG

>> Repair or replace one-way fuel valve with fuel tank.

10. 

CHECK ONE-WAY FUEL VALVE-II

1.

Make sure that fuel is drained from the tank.

2.

Remove fuel filler tube and hose.

3.

Check one-way fuel valve for operation as follows.
When a stick is inserted, the valve should open, when removing
stick it should close.
Do not drop any material into the tank.

OK or NG

OK

>> INSPECTION END

NG

>> Replace fuel filler tube or replace one-way fuel valve

with fuel tank.

Component Inspection

ABS004PH

REFUELING EVAP VAPOR CUT VALVE

 With CONSULT-II

1.

Remove fuel tank. Refer to 

FL-9, "FUEL TANK"

 .

2.

Drain fuel from the tank as follows:

a.

Remove fuel feed hose located on the fuel gauge retainer.

b.

Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other
side to a fuel container.

c.

Drain fuel using “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT-II.

3.

Check refueling EVAP vapor cut valve for being stuck to close as follows.
Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.

4.

Check refueling EVAP vapor cut valve for being stuck to open as follows.

a.

Connect vacuum pump to hose end.

b.

Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.

c.

Put fuel tank upside down.

SEF665U

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-663

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d.

Apply vacuum pressure to hose end [

13.3 kPa (

100 mmHg, 

3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

 Without CONSULT-II

1.

Remove fuel tank. Refer to 

FL-9, "FUEL TANK"

 .

2.

Drain fuel from the tank as follows:

a.

Remove fuel gauge retainer.

b.

Drain fuel from the tank using a handy pump into a fuel container.

3.

Check refueling EVAP vapor cut valve for being stuck to close as follows.
Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.

4.

Check refueling EVAP vapor cut valve for being stuck to open as follows.

a.

Connect vacuum pump to hose end.

b.

Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.

c.

Put fuel tank upside down.

d.

Apply vacuum pressure to hose end [

13.3 kPa (

100 mmHg, 

3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

PBIB1388E

PBIB1388E

EC-664

POSITIVE CRANKCASE VENTILATION

Revision; 2004 April

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POSITIVE CRANKCASE VENTILATION

PFP:11810

Description

ABS004PI

SYSTEM DESCRIPTION

This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the
PCV valve. Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of venti-
lating air. The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air
passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold
vacuum is insufficient to draw the blow-by flow through the valve. The flow goes through the hose connection
in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.

Component Inspection

ABS004PJ

PCV (POSITIVE CRANKCASE VENTILATION) VALVE

With engine running at idle, remove PCV valve from rocker cover. A
properly working valve makes a hissing noise as air passes through
it. A strong vacuum should be felt immediately when a finger is
placed over valve inlet.

SEC921C

PBIB1588E

PBIB1589E

POSITIVE CRANKCASE VENTILATION

EC-665

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PCV VALVE VENTILATION HOSE

1.

Check hoses and hose connections for leaks.

2.

Disconnect all hoses and clean with compressed air. If any hose
cannot be freed of obstructions, replace.

S-ET277

EC-666

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

Revision; 2004 April

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AUTOMATIC SPEED CONTROL DEVICE (ASCD)

PFP:18930

System Description

ABS004PK

INPUT/OUTPUT SIGNAL CHART

BASIC ASCD SYSTEM

Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter. If any
malfunction occurs in ASCD system, it automatically deactivates control.

SET OPERATION

Press ASCD CRUISE switch (Main switch). (The CRUISE indicator in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET switch. (Then SET indicator in combination meter illuminates.)

ACCEL OPERATION

If the RESUME/ACCEL switch is pressed during cruise control driving, increase the vehicle speed until the
switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.

CANCEL OPERATION

When any of following conditions exist, cruise operation will be canceled.

CANCEL switch is pressed

More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)

Brake pedal is depressed

Selector lever is changed to “N”, “P”, “R” position

Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed

VDC/TCS system is operated

CVT control system has a malfunction. Refer to 

EC-549, "DTC P1700 CVT CONTROL SYSTEM"

 .

When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.

Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may
blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by pressing SET switch or RESUME switch.

Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.

If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.

COAST OPERATION

When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.

Sensor

Input signal to ECM

ECM function

Actuator

ASCD brake switch

Brake pedal operation

ASCD vehicle speed control

Electric throttle control 
actuator

Stop lamp switch

Brake pedal operation

ASCD steering switch

ASCD steering switch operation

Park/Neutral position (PNP) 
switch

Gear position

Unified meter and A/C amp.

Vehicle speed

TCM

Powertrain revolution

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

EC-667

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RESUME OPERATION

When the RESUME/ACCEL switch is pressed after cancel operation other than pressing MAIN switch is per-
formed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must meet
following conditions.

Brake pedal is released

CVT selector lever is in other than P and N positions

Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)

EC-668

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

Revision; 2004 April

2003 Murano

Component Description

ABS004PL

ASCD STEERING SWITCH

Refer to 

EC-532

 .

ASCD BRAKE SWITCH

Refer to 

EC-539

 , an

EC-640

 .

STOP LAMP SWITCH

Refer to 

EC-564

 .

ELECTRIC THROTTLE CONTROL ACTUATOR 

Refer to 

EC-436

 , 

EC-438

 , 

EC-444

  an

EC-449

 .

ASCD INDICATOR

Refer to 

EC-647

 .

SERVICE DATA AND SPECIFICATIONS (SDS)

EC-669

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SERVICE DATA AND SPECIFICATIONS (SDS)

PFP:00030

Fuel Pressure

ABS004PM

Idle Speed and Ignition Timing

ABS004PN

*1: Under the following conditions:

Air conditioner switch: OFF

Electric load: OFF (Lights, heater fan & rear window defogger)

Steering wheel: Kept in straight-ahead position

Calculated Load Value

ABS004PO

Mass Air Flow Sensor

ABS004PP

*: Engine is warmed up to normal operating temperature and running under no-load.

Intake Air Temperature Sensor

ABS004PQ

Engine Coolant Temperature Sensor

ABS004PR

Heated Oxygen Sensor 1 Heater

ABS004PS

Heated Oxygen sensor 2 Heater

ABS004PT

Crankshaft Position Sensor (POS)

ABS004PU

Refer to 

EC-327, "Component Inspection"

 .

Camshaft Position Sensor (PHASE)

ABS004PV

Refer to 

EC-335, "Component Inspection"

 .

Throttle Control Motor

ABS004PW

Fuel pressure at idling kPa (kg/cm

2

 , psi)

Approximately 350 (3.57, 51)

Target idle speed

No-load*

1

  (in “P” or “N” position)

650

±

50 rpm

Air conditioner: ON

In “P” or N” position

700 rpm or more

Ignition timing

In “P” or N” position

15

°

 

±

 5

°

 BTDC

Calculated load value % (Using CONSULT-II or GST)

At idle

5 - 35

At 2,500 rpm

5 - 35

Supply voltage

Battery voltage (11 - 14V)

Output voltage at idle

1.1 - 1.5V*

Mass air flow (Using CONSULT-II or GST)

2.0 - 6.0 g·m/sec at idle*

7.0 - 20.0 g·m/sec at 2,500 rpm*

Temperature 

°

C (

°

F)

Resistance k

25 (77)

1.94 - 2.06

80 (176)

0.295 - 0.349

Temperature 

°

C (

°

F)

Resistance k

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

Resistance [at 25

°

C (77

°

F)]

3.3 - 4.0

Resistance [at 25

°

C (77

°

F)]

5.0 - 7.0

Resistance [at 25

°

C (77

°

F)]

Approximately 1 - 15

EC-670

SERVICE DATA AND SPECIFICATIONS (SDS)

Revision; 2004 April

2003 Murano

Injector

ABS004PX

Fuel Pump

ABS004PY

Resistance [at 20

°

C (68

°

F)]

13.5 - 17.5

Resistance [at 25

°

C (77

°

F)]

0.2 – 5.0

 

 

 

 

 

 

 

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