Nissan Murano Z50 (2006 year). Manual — part 78
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
PFP:18930
System Description
NBS002YO
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
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.
NOTE:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press 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/COAST switch. (Then SET indicator in combination meter illuminates.)
ACCELERATE OPERATION
If the RESUME/ACCELERATE 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.
●
Shift 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-537, "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/COAST switch or RESUME/
ACCELERATE 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.
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*
EC-28
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2006 August
2006 Murano
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.
RESUME OPERATION
When the RESUME/ACCELERATE switch is pressed after cancel operation other than pressing MAIN switch
is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must
meet following conditions.
●
Brake pedal is released.
●
CVT shift 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).
Component Description
NBS002YP
ASCD STEERING SWITCH
Refer to
ASCD BRAKE SWITCH
Refer to
STOP LAMP SWITCH
Refer to
and
.
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to
and
.
ASCD INDICATOR
Refer to
CAN COMMUNICATION
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CAN COMMUNICATION
PFP:23710
System Description
NBS002YQ
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Refer to
, about CAN communication for detail.
EC-30
EVAPORATIVE EMISSION SYSTEM
Revision: 2006 August
2006 Murano
EVAPORATIVE EMISSION SYSTEM
PFP:14950
Description
NBS002YR
SYSTEM DESCRIPTION
The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel
system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.
The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the
vapor is stored there when the engine is not operating or when refueling to the fuel tank.
The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the
engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the
engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is
proportionally regulated as the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and
idling.
PBIB1631E
EVAPORATIVE EMISSION SYSTEM
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EVAPORATIVE EMISSION LINE DRAWING
PBIB3191E
EC-32
EVAPORATIVE EMISSION SYSTEM
Revision: 2006 August
2006 Murano
PBIB1385E
EVAPORATIVE EMISSION SYSTEM
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Component Inspection
NBS002YS
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
FUEL TANK TEMPERATURE SENSOR
Refer to
EVAP CANISTER VENT CONTROL VALVE
Refer to
EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
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-34
EVAPORATIVE EMISSION SYSTEM
Revision: 2006 August
2006 Murano
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
NBS002YT
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.
Always reprece O-ring with a new one.
How to Detect Fuel Vapor Leakage
NBS002YU
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
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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
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-36
EVAPORATIVE EMISSION SYSTEM
Revision: 2006 August
2006 Murano
3.
Apply battery voltage to the terminal 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-31, "EVAPORATIVE EMISSION LINE DRAWING"
PBIB1365E
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
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ON BOARD REFUELING VAPOR RECOVERY (ORVR)
PFP:00032
System Description
NBS002YV
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,
–
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-38
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Revision: 2006 August
2006 Murano
Diagnostic Procedure
NBS002YW
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
.
OK or NG
OK
>> INSPECTION END
NG
>> Replace refueling EVAP vapor cut valve with fuel tank.
PBIB1381E
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
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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-40
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Revision: 2006 August
2006 Murano
7.
CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to
.
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
NBS002YX
REFUELING EVAP VAPOR CUT VALVE
With CONSULT-II
1.
Remove fuel tank. Refer to
.
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)
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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.
.
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-42
POSITIVE CRANKCASE VENTILATION
Revision: 2006 August
2006 Murano
POSITIVE CRANKCASE VENTILATION
PFP:11810
Description
NBS002YY
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
NBS002YZ
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
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