Nissan Murano Z50 (2003 year). Manual — part 58
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
BRC-149
[VDC/TCS/ABS]
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BRC
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In the case that ABS actuator and electric unit (control unit) are replaced, make sure to adjust position of
steering angle sensor. Refer to
BRC-70, "Adjustment of Steering Angle Sensor Neutral Position"
BRC-150
[VDC/TCS/ABS]
G SENSOR
Revision; 2004 April
2003 Murano
G SENSOR
PFP:47930
Removal and Installation
AFS001BY
REMOVAL
1.
Remove center console. Refer to
2.
Disconnect harness connector.
3.
Remove installation nuts. Remove yaw rate/side/decel G-sen-
sor.
CAUTION:
●
Do not drop or strike the yaw rate/side/decel G-sensor,
because it has little endurance to impact.
●
Do not use power tool etc., because Yaw rate/side/decel G
sensor is weak for the impact.
INSTALLATION
Install in the revers order of removal.
CAUTION:
●
Do not drop or strike the yaw rate/side/decel G-sensor, because it has little endurance to impact.
NOTE:
●
After performing above work, calibrate decel G-sensor (AWD model). Refer to
PFIA0450E
STEERING ANGLE SENSOR
BRC-151
[VDC/TCS/ABS]
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BRC
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STEERING ANGLE SENSOR
PFP:25554
Removal and Installation
AFS00212
Refer to
.
NOTE:
●
Steering angle sensor is built into the spiral cable.
●
In the case that ABS actuator and electric unit (control unit) are replaced, make sure to adjust position of
steering angle sensor. Refer to
BRC-70, "Adjustment of Steering Angle Sensor Neutral Position"
BRC-152
[VDC/TCS/ABS]
STEERING ANGLE SENSOR
Revision; 2004 April
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CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION
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ENGINE COOLING SYSTEM
PRECAUTIONS . . . . . . . . . . . . . . .. 2
REMOVAL OF LIQUID GASKET SEALING . . .. 2
LIQUID GASKET APPLICATION PROCEDURE
PREPARATION . . . . . . . . . . . . . . ... 4
Special Service Tools . . . . . . . . . . . ... 4
Commercial Service Tools . . . . . . . . . . 4
OVERHEATING CAUSE ANALYSIS . . . . . . .. 5
Troubleshooting Chart . . . . . . . . . . . .. 5
COOLING SYSTEM . . . . . . . . . . . . . 7
Cooling Circuit . . . . . . . . . . . . . . .. 7
ENGINE COOLANT . . . . . . . . . . . . . 8
Inspection . . . . . . . . . . . . . . . . . 8
LEVEL CHECK . . . . . . . . . . . . . . 8
LEAK CHECK . . . . . . . . . . . . . ... 8
Changing Engine Coolant . . . . . . . . . . 8
RADIATOR . . . . . . . . . . . . . . . . 12
Removal and Installation . . . . . . . . . . 12
REMOVAL . . . . . . . . . . . . . . ... 12
INSTALLATION . . . . . . . . . . . . ... 13
Disassembly and Assembly Radiator Cooling Fan
DISASSEMBLY . . . . . . . . . . . . ... 14
ASSEMBLY . . . . . . . . . . . . . . . 14
Checking Radiator Cap . . . . . . . . . . .. 14
Checking Radiator . . . . . . . . . . . . .. 15
RADIATOR (ALUMINUM TYPE) . . . . . . . ... 16
Disassembly and Assembly . . . . . . . . . 16
WATER PUMP . . . . . . . . . . . . . . .. 20
Removal and Installation . . . . . . . . . . 20
THERMOSTAT AND THERMOSTAT HOUSING . .. 24
Removal and Installation . . . . . . . . . . 24
WATER OUTLET AND WATER PIPING . . . . ... 26
Removal and Installation . . . . . . . . . . 26
REMOVAL . . . . . . . . . . . . . . ... 26
INSTALLATION . . . . . . . . . . . . ... 26
CO-2
PRECAUTIONS
Revision; 2004 April
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PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
ABS004RH
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 driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
●
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
●
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
●
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Liquid Gasket
ABS004RI
REMOVAL OF LIQUID GASKET SEALING
●
After removing the mounting bolts and nuts, separate the mating
surface using a seal cutter and remove the liquid gasket sealing.
CAUTION:
Be careful not to damage the mating surfaces.
●
In areas where the cutter is difficult to use, use a plastic hammer
to lightly tap the area where the liquid gasket is applied.
CAUTION:
If for some unavoidable reason a tool such as a flat-bladed
screwdriver is used, be careful not to damage the mating
surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1.
Using a scraper, remove the old liquid gasket adhering to the
gasket application surface and the mating surface.
●
Remove the liquid gasket completely from the groove of the
gasket application surface, mounting bolts, and bolt holes.
2.
Wipe the gasket application surface and the mating surface with
white gasoline (lighting and heating use) to remove adhering
moisture, grease and foreign materials.
3.
Attach the liquid gasket tube to the tube presser.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-46, "RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS"
PBIC0002E
PBIC0003E
PRECAUTIONS
CO-3
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4.
Apply the liquid gasket without breaks to the specified location
with the specified dimensions.
●
If there is a groove for the liquid gasket application, apply the
gasket to the groove.
●
As for the bolt holes, normally apply the gasket inside the
holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of service manual.
●
Within five minutes of gasket application, install the mating
component.
●
If the liquid gasket protrudes, wipe it off immediately.
●
Do not retighten after the installation.
●
After 30 minutes or more have passed from the installation, fill
the engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe
them.
EMA0622D
SEM159F
CO-4
PREPARATION
Revision; 2004 April
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PREPARATION
PFP:00002
Special Service Tools
ABS0035A
The actual shapes of Kent-Moore tools may from those of special service tools illustrated here.
Commercial Service Tools
ABS0035B
Tool number
(Kent-Moore No.)
Tool name
Description
WS39930000
( – )
Tube pressure
Pressing the tube of liquid gasket
EG17650301
(J33984-A)
Radiator cap tester adapter
Adapting radiator cap tester to radiator cap
and radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
KV99103510
( – )
Radiator plate pliers A
Installing radiator upper and lower tanks
KV99103520
( – )
Radiator plate pliers B
Removing radiator upper and lower tanks
S-NT052
S-NT564
S-NT224
S-NT225
Tool name
Description
Power tool
Loosening bolts and nuts
PBIC0190E
OVERHEATING CAUSE ANALYSIS
CO-5
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OVERHEATING CAUSE ANALYSIS
PFP:00012
Troubleshooting Chart
ABS0035C
Symptom
Check items
Cooling sys-
tem parts
malfunction
Poor heat transfer
Water pump malfunction
Worn or loose drive belt
—
Thermostat stuck closed
—
Damaged fins
Dust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tube
Excess foreign material
(rust, dirt, sand, etc.)
Reduced air flow
Cooling fan does not oper-
ate
Fan assembly
—
High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud
—
—
—
Improper engine coolant
mixture ratio
—
—
—
Poor engine coolant quality
—
Engine coolant viscosity
—
Insufficient engine coolant
Engine coolant leaks
Cooling hose
Loose clamp
Cracked hose
Water pump
Poor sealing
Radiator cap
Loose
Poor sealing
Radiator
O-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank
Cracked reservoir tank
Overflowing reservoir tank
Exhaust gas leaks into
cooling system
Cylinder head deterioration
Cylinder head gasket dete-
rioration
CO-6
OVERHEATING CAUSE ANALYSIS
Revision; 2004 April
2003 Murano
Except cool-
ing system
parts mal-
function
—
Overload on engine
Abusive driving
High engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow
Blocked bumper
—
—
Blocked radiator grille
Installed car brassiere
Mud contamination or
paper clogging
Blocked radiator
—
Blocked condenser
Blocked air flow
Installed large fog lamp
Symptom
Check items
COOLING SYSTEM
CO-7
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COOLING SYSTEM
PFP:21020
Cooling Circuit
ABS0034X
PBIC1647E
PBIC1648E
CO-8
ENGINE COOLANT
Revision; 2004 April
2003 Murano
ENGINE COOLANT
PFP:KQ100
Inspection
ABS0035F
LEVEL CHECK
●
Check if the reservoir tank engine coolant level is within the MIN
to MAX range when the engine is cool.
●
Adjust the coolant level as necessary.
LEAK CHECK
●
To check for leaks, apply pressure to the cooling system with the
tester.
WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could occur from high pressure coolant escaping from
the radiator.
CAUTION:
Higher test pressure than specified may cause radiator dam-
age.
Changing Engine Coolant
ABS0035V
WARNING:
●
To avoid being scalded, never change the engine coolant when the engine is hot.
●
Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn
to release built-up pressure. Then turn the cap all the way.
DRAINING ENGINE COOLANT
1.
Remove radiator drain hole cap on engine undercover.
2.
Open radiator drain plug at the bottom of radiator and remove
the radiator filler cap.
●
Be careful not to allow engine coolant to contact the drive
belts.
SMA412B
Testing pressure : 157 kPa (1.6 kg/cm
2
, 23 psi)
SLC756A
PBIC1204E
ENGINE COOLANT
CO-9
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3.
When draining all of the engine coolant for engine removal or
repair, open the drain plugs on the engine-right and left sides
and the engine-front side.
4.
Remove the reservoir tank, drain the engine coolant and clean the tank before installing.
5.
Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush the engine cooling system. Refer to
CO-11, "FLUSHING COOLING SYSTEM"
.
PBIC1205E
PBIC1285E
PBIC0846E
CO-10
ENGINE COOLANT
Revision; 2004 April
2003 Murano
REFILLING ENGINE COOLANT
1.
Install reservoir tank if removed, and radiator drain plug.
2.
Close and tighten cylinder block drain plugs securely if removed.
●
Apply sealant to the threads of the cylinder block drain plugs.
●
Use Genuine Thread Sealant or equivalent. Refer to
GI-46, "RECOMMENDED CHEMICAL PROD-
3.
Fill radiator, and reservoir tank if removed, to specified level.
●
Pour engine coolant through coolant filler neck slowly of
less than 2 (2-1/8 US qt,1-3/4 lmp qt) a minute to allow
air in system to escape.
●
Use genuine Nissan anti-freeze coolant or equivalent
mixed with water (distilled or demineralized. Refer to
11, "RECOMMENDED FLUIDS AND LUBRICANTS"
4.
Warm up engine to normal operating temperature with radiator
cap installed.
5.
Run engine at 3,000 rpm for 10 seconds and return to idle
speed.
●
Repeat two or three times.
6.
Stop engine and cool down to less than approximately 50
°
C
(122
°
F).
●
Cool down using a fan to reduce the time.
●
If necessary, refill radiator up to filler neck with engine coolant.
7.
Refill reservoir tank to MAX level line with engine coolant.
8.
Repeat steps 4 through 7 two or more times with radiator cap installed until engine coolant level no longer
drops.
9.
Check cooling system for leaks with engine running.
10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000 r
pm with heater temperature controller set at several position between COOL and WARM.
●
Sound may be noticeable at heater unit.
11. Repeat step 10 three times.
12. If sound is heard, bleed air from cooling system by repeating step 4 through 8 until engine coolant level no
longer drops.
●
Clean excess engine coolant from engine.
Radiator drain plug:
: 0.78 - 1.56 N·m (0.08 - 0.15 kg-m, 7 - 13 in-lb)
Cylinder block drain plug (LH):
: 59 - 65 N·m (6.1 - 6.6 kg-m, 44 - 47 ft-lb)
Cylinder block drain plug (RH):
: 24.5 - 29.4 N·m (2.5 - 2.9 kg-m, 18 - 21 ft-lb)
Cylinder block drain plug (Front side):
: 7.8 - 11.8 N·m (0.8 - 1.2 kg-m, 69 - 104 in-lb)
Engine coolant capacity
(with reservoir tank at MAX level)
: Approximately 9.2 (9-3/4 US qt, 8-1/8 lmp qt)
SMA182B
Reservoir tank capacity (at MAX level)
: 0.8 (7/8 US qt, 3/4 lmp qt)
SMA412B
ENGINE COOLANT
CO-11
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FLUSHING COOLING SYSTEM
1.
Fill radiator with water until water spills from the air relief hole, then close air relief plug. Fill radiator and
reservoir tank with water and reinstall radiator cap.
2.
Run engine and warm it up to normal operating temperature.
3.
Rev engine two or three times under no-load.
4.
Stop engine and wait until it cools down.
5.
Drain the water from the system. Refer to
MA-15, "DRAINING ENGINE COOLANT"
6.
Repeat steps 1 through 5 until clear water begins to drain from the radiator.
CO-12
RADIATOR
Revision; 2004 April
2003 Murano
RADIATOR
PFP:21400
Removal and Installation
ABS0035H
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator.
REMOVAL
1.
Remove undercover.
2.
Drain engine coolant. Refer to
MA-15, "Changing Engine Coolant"
CAUTION:
Perform when the engine is cold.
3.
Remove air duct and radiator cover grills. Refer to
EM-14, "Removal and Installation"
4.
Disconnect CVT fluid cooler hoses.
●
Install plug to avoid leakage of CVT fluid.
5.
Remove reservoir tank and bracket.
6.
Disconnect upper and lower radiator hoses.
7.
Remove battery and battery tray, and move fuse box aside.
8.
Remove radiator cooling fan assembly.
1.
Bracket
2.
Reservoir tank filler cap
3.
Reservoir tank
4.
Bracket
5.
Clamp
6.
Reservoir tank hose
7.
Radiator upper clip
8.
Mounting rubber
9.
Radiator cap
10. Radiator
11.
Mounting rubber
12. Clamp
13. CVT fluid cooler hose
14. Clamp
15. Radiator hose (lower)
16. CVT fluid cooler hose
17. O-ring
18. Drain plug
19. Radiator hose (upper)
20. Radiator cooling fan assembly
PBIC1206E
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