Nissan Murano Z50 (2005 year). Manual — part 221
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
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Revision: 2005 August
2005 Murano
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
PFP:00003
NVH Troubleshooting Chart
ADS000WF
Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-
tion. If necessary, repair or replace these parts.
Reference page
SUSPECTED PARTS
(Possible cause)
TRANSFER
OI
L
(
Lev
el low)
TR
AN
SFER
O
IL
(
W
rong)
TR
AN
SFER
O
IL
(
Lev
el
t
oo
hi
gh)
LIQUI
D
GASKET (
D
a
m
a
g
ed)
O
-R
IN
G
(
W
o
rn
or
d
a
m
aged
)
O
IL
SE
AL (
W
o
rn
or
d
a
m
a
ged
)
G
EAR
(
W
o
rn or
d
a
m
aged
)
BEARING
(W
or
n or
da
m
a
ged)
Symptom
Noise
1
2
3
3
Transfer oil leakage
3
1
2
2
2
TF-10
TRANSFER OIL
Revision: 2005 August
2005 Murano
TRANSFER OIL
PFP:KLD30
Replacement
ADS000UA
DRAINING
CAUTION:
When draining oil, protect exhaust tube flange with cover.
1.
Run the vehicle to warm up the transfer body sufficiently.
2.
Stop the engine, and remove the drain plug to drain the transfer
oil.
3.
Apply sealant to drain plug. Install drain plug on transfer and
tighten to the specified torque. Refer to
●
Use Genuine Silicone RTV or equivalent. Refer to
"Recommended Chemical Products and Sealants"
.
FILLING
1.
Remove filler plug and add gear oil until oil level reaches the
specified limit near filler plug mounting hole.
CAUTION:
Carefully fill the oil. (Fill up for approx. 3 minutes)
2.
Leave the vehicle for 3 minutes, and check the oil level again.
3.
Apply sealant to filler plug. Install filler plug to transfer and
tighten to the specified torque. Refer to
●
Use Genuine Silicone RTV or equivalent. Refer to
"Recommended Chemical Products and Sealants"
.
Inspection
ADS000UB
OIL LEAKAGE AND OIL LEVEL
1.
Check oil level from filler plug mounting hole as shown in the fig-
ure.
CAUTION:
Do not start engine while checking oil level.
2.
Before installing filler plug, apply sealant. Install filler plug on
transfer and tighten to the specified torque. Refer to
●
Use Genuine Silicone RTV or equivalent. Refer to
"Recommended Chemical Products and Sealants"
.
SDIA1507E
Oil capacity
: Approx. 0.31 (5/8 US pt, 1/2 lmp pt)
SDIA1508E
SDIA1508E
AWD SYSTEM
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Revision: 2005 August
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AWD SYSTEM
PFP:41650
Power Transfer Diagram
ADS000WG
System Description
ADS000WH
ELECTRIC CONTROLLED COUPLING
Operation Principle
1.
AWD control unit supplies command current to electric con-
trolled coupling (AWD solenoid).
2.
Control clutch is engaged by electromagnet and torque is
detected in control clutch.
3.
The cam operates in response to control clutch torque and
applies pressure to main clutch.
4.
Main clutch transmits torque to front wheels according to press-
ing power.
●
Transmission torque to rear wheels is determined according
to command current.
AWD CONTROL UNIT
●
AWD control unit controls distribution of drive power between
front-wheel drive (100:0) and AWD (50:50) conditions according
to signals from the sensors.
●
Self-diagnosis results can be read with CONSULT-II.
SDIA1607E
SDIA2035E
SDIA1844E
SDIA2341E
TF-12
AWD SYSTEM
Revision: 2005 August
2005 Murano
AWD LOCK SWITCH
AUTO Mode
●
Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.
●
AUTO mode makes stable driving possible, with no wheel spin, on snowy roads or other slippery sur-
faces.
●
On roads which do not require AWD, it contributes to improved fuel economy by driving in conditions close
to front-wheel drive.
●
Sensor inputs determine the vehicle's turning condition, and tight cornering/braking are controlled by dis-
tributing optimum torque to the rear wheels.
LOCK Mode
●
Front/rear wheel torque distribution is fixed, ensuring stable driving when climbing slopes.
●
Vehicle will switch automatically to AUTO mode if vehicle speed increases. If vehicle speed then
decreases, the vehicle automatically returns to direct 4-wheel driving conditions.The AWD LOCK indicator
lamp keeps illuminating.
●
LOCK mode will change to AUTO mode automatically, when the vehicle speed exceeds approx. 10 km/h
(6 MPH) for a long time. The AWD LOCK indicator lamp turns off.
●
When the vehicle speed exceeds approx. 10 km/h (6 MPH), AUTO mode cannot be shifted to LOCK
mode. In contrast, LOCK mode can be shifted to AUTO mode.
●
LOCK mode will change to AUTO mode automatically, when the ignition switch is turned “OFF”.
NOTE:
●
Every time AWD LOCK switch is pressed, AUTO mode and LOCK mode switch each other.
●
When driving in AUTO mode or LOCK mode, if there is a large difference between front and rear wheel
speed which continues for a long time, oil temperature of drive system parts becomes too high and AWD
warning lamp flashes rapidly. (When AWD warning lamp flashes, vehicle changes to front-wheel drive
conditions.)
●
If AWD warning lamp is flashing rapidly, stop vehicle and allow it to idle for some time. Flashing will stop
and AUTO mode will be restored.
●
When driving in AUTO mode, AWD warning lamp may flash slowly if there is a significant difference in
diameter of the tires. At this time, vehicle performance is not fully available and cautious driving is
required. (Continues until engine is turned OFF.)
●
If the warning lamp flashes slowly during driving but remains OFF after engine is restarted, the system is
normal. If it again flashes slowly after driving for some time, vehicle must be inspected.
●
If there is a difference of revolution speed between the front and rear wheel with AUTO mode the shift
occasionally changes to LOCK mode automatically. This is not malfunction.
●
If there is a significant difference in pressure or wear between tires, full vehicle performance is not avail-
able. Tire conditions are detected, and LOCK mode may be prohibited, or else speeds at which LOCK
mode is enabled may be restricted.
AWD LOCK INDICATOR LAMP
The following is the indications of indicator lamp.
AWD WARNING LAMP
Turns ON when there is a malfunction in AWD system. It indicates that fail-safe mode is engaged and vehicle
change to front-wheel drive or shifting driving force-AWD (Rear-wheels still have some driving torque).
Also turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately in 1
seconds after the engine starts if system is normal.
Condition
AWD LOCK indicator lamp
AUTO mode
OFF
LOCK mode
ON
Lamp check
Turns ON for approx. 1 second when ignition switch is turned ON.
SDIA2330E
AWD SYSTEM
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Revision: 2005 August
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AWD Warning Lamp Indication
System Diagram
ADS000V9
Condition
AWD warning lamp
Lamp check
Turns ON when ignition switch is turned ON. Turns OFF
approx. 1 seconds after engine start.
AWD system malfunction
ON
Protection function is activated due to heavy load to electric con-
trolled coupling. (AWD system is not malfunctioning and AWD system
changes to 2WD mode.)
Rapid flashing: 2 times/second
(Flashing in approx. 1 minute and then turning OFF.)
Large difference in diameter of front/rear tires
Slow flashing: 1 time/2 seconds
(Continuing to flash until turning ignition switch OFF)
Other than above (system normal)
OFF
SDIA2329E
TF-14
AWD SYSTEM
Revision: 2005 August
2005 Murano
COMPONENTS FUNCTION DESCRIPTION
CAN Communication
ADS000VA
SYSTEM DESCRIPTION
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.
For details, refer to
LAN-29, "CAN Communication Unit"
.
Component parts
Function
AWD control unit
●
Controls driving force distribution by signals from each sensor and switch from front wheel driving
mode (100:0) to AWD mode (50:50).
●
2WD mode is available by fail-safe function if malfunction is detected in AWD system.
Wheel sensors
Detects wheel speed.
AWD solenoid
Controls electric controlled coupling by command current from AWD control unit.
Electric controlled coupling
Transmits driving force to rear final drive.
AWD lock switch
Able to select AUTO or LOCK mode.
AWD warning lamp
●
Illuminates if malfunction is detected in electrical system of AWD system.
●
There is 1 blink in 2 seconds if rotation difference of front wheels and rear wheels is large.
●
There are 2 blinks in 1 second if load is still applied to driving parts.
AWD LOCK indicator lamp
Illuminates in LOCK mode (direct AWD mode) and does not illuminate in AUTO mode.
ABS actuator and electric unit
(control unit)
Transmits the following signals via CAN communication to AWD control unit.
●
Vehicle speed signal
●
Stop lamp switch signal (brake signal)
ECM
Transmits the following signals via CAN communication to AWD control unit.
●
Accelerator pedal position signal
●
Engine speed signal
Unified meter and A/C amp.
Transmits conditions of AWD lock switch and parking brake switch via CAN communication to AWD
control unit.
TROUBLE DIAGNOSIS
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Revision: 2005 August
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TROUBLE DIAGNOSIS
PFP:00004
Fail-Safe Function
ADS000WI
●
If any malfunction occurs in AWD electrical system, and control unit detects the malfunction, AWD warn-
ing lamp on combination meter turns ON to indicate system malfunction.
●
When AWD warning lamp is ON, vehicle changes to front-wheel drive or shifting driving force-AWD (Rear-
wheels still have some driving torque).
How to Perform Trouble Diagnosis
ADS000WJ
BASIC CONCEPT
●
To perform trouble diagnosis, it is the most important to have understanding about vehicle systems (con-
trol and mechanism) thoroughly.
●
It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptoms, and understand them fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptoms by driving vehicle with
customer.
CAUTION:
Customers are not professional. It is dangerous to make an
easy guess like "maybe the customer means that...," or
"maybe the customer mentions this symptom".
●
It is essential to check symptoms right from the beginning in
order to repair malfunctions completely.
For intermittent malfunctions, reproduce symptoms based on
interview with customer and past examples. Do not perform
inspection on ad hoc basis. Most intermittent malfunctions are
caused by poor contacts. In this case, it will be effective to shake
suspected harness or connector by hand. When repairing with-
out any symptom diagnosis, you cannot judge if malfunctions
have actually been eliminated.
●
After completing diagnosis, always erase diagnostic memory.
Refer to
TF-25, "How to Erase Self-diagnostic Results"
.
●
For intermittent malfunctions, move harness or harness connec-
tor by hand. Then check for poor contact or reproduced open circuit.
SEF233G
SEF234G
TF-16
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
Location of Electrical Parts
ADS000WL
SDIA3016E
TROUBLE DIAGNOSIS
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Revision: 2005 August
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Circuit Diagram
ADS000VE
TDWB0013E
TF-18
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
Wiring Diagram — AWD —
ADS000VF
TDWB0014E
TROUBLE DIAGNOSIS
TF-19
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Revision: 2005 August
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TDWB0015E
TF-20
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
TDWB0016E
TROUBLE DIAGNOSIS
TF-21
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Revision: 2005 August
2005 Murano
TDWB0017E
TF-22
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
Trouble Diagnosis Chart for Symptoms
ADS000VG
If AWD warning lamp turns ON, perform self-diagnosis. Refer to
TF-25, "SELF-DIAG RESULT MODE"
NOTE:
●
Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not malfunction.
●
Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: LOCK mode, steering
wheel is turned fully to either sides, and accelerator pedal is depressed.
Symptom
Condition
Check item
Reference page
AWD LOCK indicator lamp does not turn
ON for approx. 1 second when the ignition
switch is turned to ON.
(AWD LOCK indicator lamp check)
Ignition switch: ON
CAN communication line
Power supply and ground for AWD con-
trol unit
Unified meter and A/C amp.
Unified meter control unit
AWD warning lamp does not turn ON when
the ignition switch is turned to ON.
(AWD warning lamp check)
Ignition switch: ON
CAN communication line
Unified meter and A/C amp.
Unified meter control unit
AWD warning lamp does not turn OFF sev-
eral seconds after engine started.
Engine running
CAN communication line
Power supply and ground for AWD con-
trol unit
Unified meter and A/C amp.
Unified meter control unit
AWD solenoid
AWD actuator relay (integrated in AWD
control unit)
Wheel sensor
AWD mode cannot be switched after engine
is started.
Engine running
AWD lock switch
CAN communication line
Unified meter and A/C amp.
Unified meter control unit
Heavy tight-corner braking symptom occurs
when the vehicle is driven in AUTO mode
and the steering wheel is turned fully to
either side after the engine is started. (See
NOTE.)
●
While driving
●
AUTO mode
●
Steering wheel is
turned fully to either
sides
CAN communication line
AWD lock switch
Accelerator pedal position signal
AWD solenoid
Mechanical malfunction of electric con-
trolled coupling (clutch sticking etc.)
Vehicle does not enter AWD mode even
though AWD warning lamp turned to OFF.
Vehicle speed: 10 km/h
(6 MPH) or less
AWD solenoid
Mechanical malfunction of electric con-
trolled coupling (Mechanical engage-
ment of clutch is not possible.)
Vehicle speed: 10 km/h
(6 MPH) or more
Operating condition of parking brake
AWD solenoid
Mechanical malfunction of electric con-
trolled coupling (Mechanical engage-
ment of clutch is not possible.)
While driving, AWD warning lamp flashes
rapidly. (When flashing in approx. 1 minute
and then turning OFF.)
Rapid flashing: 2 times/second
While driving
Protection function is activated due to
heavy load to electric controlled cou-
pling. (AWD system is not malfunction-
ing.)
While driving, AWD warning lamp flashes
slowly. (When continuing to flash until turn-
ing ignition switch OFF)
Slow flashing: 1 time/2 seconds
●
While driving
●
Vehicle speed: 20 km/h
(12 MPH) or more
Tire size is different between front and
rear of vehicle.
TROUBLE DIAGNOSIS
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AWD Control Unit Input/Output Signal Reference Values
ADS000WM
AWD CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-II
Monitored item [Unit]
Content
Condition
Display value
FR RH SENSOR [km/h] or [mph]
Wheel speed (Front wheel
right)
Vehicle stopped
0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.
Approximately equal to
the indication on speed-
ometer (Inside of
±
10%)
FR LH SENSOR [km/h] or [mph]
Wheel speed (Front wheel
left)
Vehicle stopped
0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.
Approximately equal to
the indication on speed-
ometer (Inside of
±
10%)
RR RH SENSOR [km/h] or [mph]
Wheel speed (Rear wheel
right)
Vehicle stopped
0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.
Approximately equal to
the indication on speed-
ometer (Inside of
±
10%)
RR LH SENSOR [km/h] or [mph]
Wheel speed (Rear wheel
left)
Vehicle stopped
0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.
Approximately equal to
the indication on speed-
ometer (Inside of
±
10%)
BATTERY VOLT [V]
Power supply voltage for
AWD control unit
Ignition switch: ON
Battery voltage
THRTL POS SEN [%]
Throttle opening condition
When depressing accelerator pedal
(Value rises gradually in response to
throttle position.)
0 - 100%
ETS SOLENOID [A]
Monitored value of current at
AWD solenoid
Engine speed
: At idle
AUTO
Approx. 0.000A
LOCK
Approx. 0.000A
Engine speed
: 3,000 rpm or more con-
stant
AUTO
Approx. 0.000 - 0.500A*
LOCK
Approx. 1.800A
STOP LAMP SW [ON/OFF]
Condition of brake pedal
operation
Brake pedal: Depressed
ON
Brake pedal: Released
OFF
ENG SPEED SIG [RUN/STOP]
Condition of engine running
Engine stopped
(Engine speed: Less than 400 rpm)
STOP
Engine running
(Engine speed: 400 rpm or more)
RUN
ETS ACTUATOR [ON/OFF]
Operating condition of AWD
actuator relay (integrated in
AWD control unit)
Engine stopped (Ignition
switch: ON)
OFF
Engine running
ON
4WD WARN LAMP [ON/OFF]
AWD warning lamp condition
AWD warning lamp: ON
ON
AWD warning lamp: OFF
OFF
4WD MODE SW [ON/OFF]
Input condition from AWD lock
switch
AWD lock switch
OFF
OFF
ON
ON
4WD MODE MON [AUTO/LOCK]
Control status of AWD
(Output condition of AWD
LOCK indicator lamp signal)
AWD LOCK indicator
lamp (Engine running)
OFF
AUTO
ON
LOCK
TF-24
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
*: The values are changed by throttle opening and engine speed.
CONSULT-II Function (ALL MODE AWD/4WD)
ADS000WN
FUNCTION
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II SETTING PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
●
For details, refer to the separate “CONSULT-II Operations Man-
ual”.
1.
Turn ignition switch “OFF”.
2.
Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector on vehicle.
3.
Turn ignition switch “ON”.
4.
Touch “START (NISSAN BASED VHCL)”.
DIS-TIRE MONI [mm]
Improper size tire installed
condition
Vehicle running with normal size tire
installed
0-4 mm
Vehicle running with improper size
tire installed (Front/rear tire size dif-
ference, wear condition)
4-8 mm, 8- mm
P BRAKE SW [ON/OFF]
Condition of parking brake
Parking brake operated
ON
Parking brake not operated
OFF
Monitored item [Unit]
Content
Condition
Display value
Diagnostic test mode
Function
Reference
page
Self-diagnostic results
●
Self-diagnostic results can be read and erased quickly.
Data monitor
●
Input/Output data in the AWD control unit can be read.
CAN diagnostic support monitor
●
The results of transmit/receive diagnosis of CAN communication can be read.
Active test
●
Diagnostic Test Mode in which CONSULT-II drives some actuators apart from
the AWD control unit and also shifts some parameters in a specified range.
ECU part number
●
AWD control unit part number can be read.
PBIB1300E
SAIA0450E
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