Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"INFOID:0000000001501520
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 Manual.
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 performed by
an authorized NISSAN/INFINITI dealer.
•Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
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.
Precaution for Liquid GasketINFOID:0000000001501521
REMOVAL OF LIQUID GASKET SEALING
• After removing nuts and bolts, separate the mating surface, using Tool and remove old liquid gasket sealing.
Tool number: KV10111100 (J- 3 7 228)
CAUTION:
Be careful not to damage the mating surfaces.
•Tap Tool to insert it, and then slide it by tapping on the side as
shown in the figure.
•In areas where Tool is difficult to use, use plastic hammer to lightly
tap the parts, to remove it.
CAUTION:
If for some unavoidable reason suitable tool such as screwdriver is used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1.Remove old liquid gasket adhering to the liquid gasket applica-
tion surface and the mating surface, Using scraper.
•Remove liquid gasket completely from the groove of the liquid
gasket application surface, bolts, and bolt holes.
2.Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign materials.
WBIA0566E
CO-2
PBIC0003E
< PRECAUTION >
PRECAUTIONS
[QR25DE]
3.Attach liquid gasket tube to Tool.
Tool n u mber: WS3 9 93000 0 (—)
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-15, "
Recommended Chemical Products and Sealants".
4.Apply liquid gasket without breaks to the specified location with
the specified dimensions.
•If there is a groove for the liquid gasket application, apply liq-
uid gasket to the groove.
•As for the bolt holes, normally apply liquid 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 liquid gasket application, install the mat-
ing component.
•If liquid gasket protrudes, wipe it off immediately.
• Do not retighten nuts or bolts after the installation.
•After 30 minutes or more have passed from the installation, fill
engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.
WBIA0567E
SEM159F
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CO-3
PREPARATION
< PREPARATION >
[QR25DE]
PREPARATION
PREPARATION
Precautions For High-Voltage SystemINFOID:0000000001501522
Refer to GI-24, "Precautions For High-Voltage System".
Special Service ToolINFOID:0000000001501523
The actual shape of the Kent-Moore tools may differ from those tools illustrated here.
To ol n um b er
(Kent-Moore No.)
To ol n am e
WS39930000
(—)
Tube presser
EG17650301
(J-33984-A)
Radiator cap tester adapter
KV10111100
(J-37228)
Seal cutter
Description
Pressing the tube of liquid gasket
S-NT052
Adapting radiator cap tester to radiator filler
neck:
Removing chain tensioner cover and water
pump cover
NT046
KV991J0070
(J-45695)
Coolant Refill Tool
LMA053
—
(J-23688)
Engine coolant refractometer
WBIA0539E
Refilling engine cooling system
Checking concentration of ethylene glycol in
engine coolant
Commercial Service ToolINFOID:0000000001501524
CO-4
< PREPARATION >
PREPARATION
[QR25DE]
To ol na meDescription
Power toolLoosening bolts and nuts
PBIC0190E
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CO-5
COOLING SYSTEM
Z
< FUNCTION DIAGNOSIS >
[QR25DE]
FUNCTION DIAGNOSIS
COOLING SYSTEM
Cooling CircuitINFOID:0000000001501525
AWBIA0 036Z
1. Thermostat2. Water control valve3. Water control valve housing (Water outlet)
4. Cylinder block (Thermostat housing) 5. Water inlet6. Radiator
7. Water pump8. Cylinder block9. Cylinder head
A. OpenB. ClosedC. To electric throttle control
D. To oil coolerE. To heater water pump F. From heater core
G. F ro m e l ec t ri c t h ro t tl e c o nt r olH . F r om oi l c o ol e r
CO-6
COOLING SYSTEM
Z
< FUNCTION DIAGNOSIS >
[QR25DE]
SchematicINFOID:0000000001501526
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1. Radiator2. Water inlet3. Reservoir tank
4. Thermostat5. Thermostat housing6. Water pump
7. Cylinder head8. Cylinder block9. Water control valve
10. Water control valve housing11. Heater12. Oil cooler
13. Electric throttle control14 Heater water pumpA.Open
B.Closed
AWBIA0 072Z
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OVERHEATING CAUSE ANALYSIS
< FUNCTION DIAGNOSIS >
[QR25DE]
OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000001501527
SymptomCheck items
Water pump malfunctionWorn or loose drive belt
Thermostat stuck closedCoolant circulation
Dust contamination or rock
Cooling system parts
malfunction
Poor heat transfer
Reduced air flow
Damaged radiator shroud—Radiator shroud—
Improper coolant mixture
ratio
Poor coolant quality—Periodic maintenance—
Insufficient coolant
Damaged fins
Clogged radiator cooling
tube
Cooling fan does not operate
tion
Damaged fan blades
—Coolant viscosity—
Coolant leaks
Overflowing reservoir tank
clogging
Mechanical damage
Excess foreign material
(rust, dirt, sand, etc.)
Engine cooling fans—High resistance to fan rota-
Cooling hose
Water pumpPoor sealing
Radiator cap
Radiator
Reservoir tankCracked reservoir tank
Exhaust gas leaks into cooling system
Loose clamp
Cracked hose
Loose
Poor sealing
O-ring for damage, deterioration or improper fitting
Cracked radiator tank
Cracked radiator core
Cylinder head deterioration
Cylinder head gasket deterioration
—
CO-8
< FUNCTION DIAGNOSIS >
OVERHEATING CAUSE ANALYSIS
[QR25DE]
Except cooling system
parts malfunction
—Overload on engine
Blocked or restricted air
flow
SymptomCheck items
High engine rpm under no
load
Abusive driving
Driving at extremely high
speed
Powertrain system malfunction
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked radiator grilleInstalled car brassiere
Blocked bumper
Blocked radiator
Blocked condenser
Installed large fog lamp
Mud contamination or paper
clogging
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ENGINE COOLANT
Z
< ON-VEHICLE MAINTENANCE >
[QR25DE]
ON-VEHICLE MAINTENANCE
ENGINE COOLANT
System InspectionINFOID:0000000001501528
WARNING:
•Never remove the radiator cap when the engine and inverter are hot. Serious burns could occur from
high pressure fluid escaping from the radiator.
•Wrap a thick cloth around the cap. Slowly push down and turn it a quarter turn to allow built-up pressure to escape. Carefully remove the cap by pushing down and turning it all the way.
CHECKING COOLING SYSTEM HOSES
Check hoses for the following:
•Improper attachment
•Leaks
•Cracks
•Damage
•Loose connections
•Chafing
•Deterioration
CHECKING RESERVOIR LEVEL
•Check if the reservoir tank coolant level is within MIN to MAX when
the engine and inverter are cool.
•Adjust coolant level if it is too much or too little.
SMA412B
CHECKING COOLING SYSTEM FOR LEAKS
To c h ec k f or l ea ka ge , a pp l y p r es s ur e t o t he c oo li ng s y st em u si n g
To ol .
Tool number: EG1765030 1 (J-33984-A )
Testing pr e s sure
WARNING:
Never remove the radiator cap when the engine and inverter are
hot. Serious burns could occur from high pressure coolant
escaping from the radiator.
CAUTION:
Higher pressure than specified may cause radiator damage.
: 157 kPa (1.6 kg/cm2, 23 psi)
AWBIA 0073Z
CHECKING RADIATOR CAP
CAUTION:
Use only specified radiator capfor L32. If radiator cap other than specified is used, engine overheating
is likely occur.
1.Inspect the radiator cap.
•Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket.
•Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or
the metal retainer.
NOTE:
Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
CO-10
ENGINE COOLANT
< ON-VEHICLE MAINTENANCE >
2.Pull the negative-pressure valve to open it and check that it
moves smoothly when released.
•Check that there is no dirt or damage on the valve seat of the
radiator cap negative-pressure valve.
•Check that there are no abnormalities in the opening and clos-
ing conditions of the negative-pressure valve.
3.Check radiator cap relief pressure using Tool.
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Tool n u mber: EG17 65030 1 (J-3 3 984-A )
2
Standard: 122 - 152 kPa (1.2 - 1.5 kg/cm
2
Limit: 107 kPa (1.1 kg/cm
, 16 psi)
, 18 - 22 psi)
•When connecting the radiator cap to the tester, apply water or
coolant to the cap seal surface.
•Replace the radiator cap if there is an abnormality in the nega-
tive-pressure valve, or if the open-valve pressure is outside of
WBIA0570E
the standard values.
CHECKING RADIATOR
Check radiator for mud or clogging. If necessary, clean radiator as follows.
•Be careful not to bend or damage the radiator fins.
•When radiator is cleaned without removal, remove all surrounding parts such as cooling fan shroud and
horns. Then tape the harness and electrical connectors to prevent water from entering.
1.Apply water by hose to the back side of the radiator core, with the hose pointed vertically downward.
2.Apply water again to all radiator core surfaces once per minute.
3.Stop washing if any stains no longer flow out from the radiator.
4.Blow air into the back side of radiator core, with the air hose pointed vertically downward.
2
•Use compressed air lower than 490 kPa (5 kg/cm
5.Blow air again into all the radiator core surfaces once per minute until no water sprays out.
6.Check for leaks.
, 71 psi) and keep distance more than 30 cm (11.8 in).
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Changing Engine CoolantINFOID:0000000001501529
WARNING:
•To avoid being scalded, never change the coolant when the engine and inverter are 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 push down and turn the cap all the way to remove.
DRAINING ENGINE COOLANT
1.Remove the engine undercover using power tool.
2.Open the radiator drain plug at the bottom of the radiator, and remove the radiator filler cap. This is the
only step required when partially draining the cooling system (radiator only).
CAUTION:
Do not to allow the coolant to contact the drive belts.
3.Follow this step for heater core removal/replacement only. Disconnect the upper heater hose at the
engine side and apply moderate air pressure [103.46 kPa (15 psi, 1.055 kg/cm
into the hose for 30 seconds to blow the excess coolant out of the heater core.
4.When draining all of the coolant in the system, remove the reservoir tank and drain the coolant, then clean
the reservoir tank before installation.
2
) maximum air pressure]
CO-11
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ENGINE COOLANT
B
< ON-VEHICLE MAINTENANCE >
5.When draining all of the coolant in the system for engine
removal or repair, open the drain plug on the cylinder block.
6.Check the drained coolant for contaminants such as rust, corrosion or discoloration.
If the coolant is contaminated, flush the engine cooling system. Refer to "FLUSHING COOLING SYSTEM" .
REFILLING ENGINE COOLANT
1.Install the radiator drain plug. Install the reservoir tank and cylinder block drain plug, if removed for a total
system drain or for engine removal or repair.
• The radiator must be completely empty of coolant and water.
• Apply sealant to the threads of the cylinder block drain plugs. Use Genuine High Performance
Thread Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Products and Sealants" .
[QR25DE]
KBIA0163E
Radiator drain plug: Refer to CO-14, "Removal and Installation" .
Cylinder block drain plug: Refer to EM-74, "
Disassembly and Assembly" .
2.If disconnected, reattach the upper radiator hose at the engine side.
3.Set the vehicle heater controls to the full HOT and heater ON position. Push the ignition swtch twice to the
ON position with the Hybrid system and engine OFF as necessary to activate the heater mode.
4.Install the Tool by installing the radiator cap adapter (E) onto the
radiator tee opening (F). Then attach the gauge body assembly
(B) with the refill hose (D) and the venturi assembly (A) to the
radiator cap adapter.
Tool number: KV991J00 7 0 (J-45695)
•A: Venturi assembly
•B: Guage body assembly
•C: Ball valve
•D: Refill hose
•E: Radiator cap adapter
•F: Radiator tee
5.Insert the refill hose (D) into the coolant mixture container that is
placed at floor level. Make sure the ball valve (C) is in the closed
position.
• Use Genuine NISSAN Long Life Anti-freeze coolant or
equivalent, mixed 50/50 with distilled water or demineralized water.
Refer to MA-10, "
Engine Oil Recommendation".
Engine coolant capacity
(with reservoir tank)
: Refer to MA-10, "
and Lubricants".
Fluids
6.Install an air hose to the venturi assembly (A), the air pressure
must be within specification.
Compressed air
: 5.7 - 8.5 kPa (5.6 - 8.4 kg/cm
2
, 80 - 120 psi)
supply pressure
CAUTION:
CO-12
AWBIA 0074G
ENGINE COOLANT
< ON-VEHICLE MAINTENANCE >
The compressed air supply must be equipped with an air dryer.
7.The vacuum gauge will begin to rise and there will be an audible hissing noise. During this process open
the ball valve (C) on the refill hose (D) slightly. Coolant will be visible rising in the refill hose (D). Once the
refill hose (D) is full of coolant, close the ball valve (C). This will purge any air trapped in the refill hose.
8.Continue to draw the vacuum until the gauge reaches 28 inches
of vacuum. The gauge may not reach 28 inches in high altitude
locations, refer to the vacuum specifications based on the altitude above sea level.
Altitude above sea levelVacuum gauge reading
0 - 100 m (328 ft): 28 inches of vacuum
300 m (984 ft): 27 inches of vacuum
500 m (1,641 ft): 26 inches of vacuum
1,000 m (3,281 ft): 24 - 25 inches of vacuum
[QR25DE]
LLIA0057E
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9.When the vacuum gauge has reached the specified amount, disconnect the air hose and wait 20 seconds
to see if the system loses any vacuum. If the vacuum level drops, perform any necessary repairs to the
system and repeat steps 6 - 8 to bring the vacuum to the specified amount. Recheck for any leaks.
10. Place the coolant container [with the refill hose (D) inserted] at the same level as the top of the radiator.
Then open the ball valve (C) on the refill hose (D) so the coolant will be drawn up to fill the cooling system.
The cooling system is full when the vacuum gauge reads zero.
CAUTION:
Do not allow the coolant container to get too low when filling, to avoid air from being drawn into
the cooling system.
11. Remove th e Tool from the radiat o r n e c k opening.
12. Fill the cooling system reservoir tank to the specified level and install the radiator cap. Turn the Hybrid
system ON to the engine to warm up the cooling system and top up the system as necessary.
FLUSHING COOLING SYSTEM
1.Fill the radiator from the filler cap above the radiator upper hose and reservoir tank, with water and reinstall the filler cap above the radiator upper hose.
2.Turn the Hybrid system ON to the engine until it reaches normal operating temperature.
3.Press the engine accelerator two or three times under no-load.
4.Turn the Hybrid system off and wait until it cools down.
5.Drain the water.
6.Repeat steps 1 through 5 until clear water begins to drain from the radiator.
4. Radiator fan assembly5. Reservoir tank6. Reservoir hose
7. Radiator filler cap8. ClampsA. To water outlet
B. To water inlet
WARNING:
Never remove the radiator cap when the engine and inverter are hot. Serious burns could occur from
high pressure coolant escaping from the radiator and condensor assembly. Wrap a thick cloth around
the cap. Slowly turn it a quarter turn to allow built-up pressure to escape. Carefully remove the cap by
turning it all the way.
REMOVAL
1.Remove engine under cover.
2.Drain engine coolant from radiator and condensor assembly. Refer to CO-11, "Changing Engine Coolant".
3.Remove air cleaner duct (front)
4.Remove radiator upper hose and lower hose.
5.Remove coolant reservoir hose.
6.Drain inverter coolant from sub-radiator. Refer to HBC-617, "
7.Remove front bumper reinforcement, Refer to EXT-12, "
8.Remove sub radiator. Refer to HBC-627, "
9.Discharge A/C system. Refer to HA-30, "
10. Remove high side junction pipe assembly. Refer to HA-38, "
11. R emove the r efriger a n t p r essure sensor for installa t ion o n ne w as s e mbly. Refer to HA-40, "
Installation for Refrigerant Pressure Sensor".
Removal and Installation".
HFC-134a (R-134a) Service Procedure".
Replacement".
Removal and Installation".
Removal and Installation for Junction Pipe".
Removal and
CO-14
RADIATOR
< ON-VEHICLE REPAIR >
12. Remove both radiator clips.
13. Remove radiator and condensor assembly.
CAUTION:
•Do not damage or scratch the radiator and condenser assembly and sub radiator core when removing.
•When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
•When installing refrigerant components to vehicle, never remove the caps (unseal) until just before
connecting the components. Connect all refrigerant loop components as quickly as possible to minimize the entry of moisture into system
[QR25DE]
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INSTALLATION
Installation is in the reverse order of removal.
INSPECTION
Radiator
1.Check radiator for mud or clogging. If necessary, clean radiator as follows:
•Be careful not to bend or damage the radiator fins.
•When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator
shroud and horns. Then tape the harness and electrical connectors to prevent water from entering.
a.Apply water by hose to the back side of the radiator core, point the hose vertically downward.
b.Apply water again to all radiator core surfaces once per minute.
c.Stop washing when no more dirt flows off the radiator.
d.Blow air into the back side of radiator core, point the air hose vertically downward.
2
•Use compressed air lower than 490 kPa (5 kg/cm
e. Blow air again into all the radiator core surfaces once per minute until no water sprays out.
, 71 psi) and keep distance more than 30 cm (11.8 in).
D
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COOLING FAN
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< ON-VEHICLE REPAIR >
[QR25DE]
COOLING FAN
Removal and InstallationINFOID:0000000001501531
1.Fan blade2.Radiator cooling fan shroud and motor assembly
REMOVAL
1.Disconnect the 12-volt battery negative terminal.
2.Drain engine coolant from radiator. Refer to CO-11, "Changing Engine Coolant".
CAUTION:
Perform when engine and inverter are cold.
3.Remove inverter upper bracket.
4.Remove engine undercover.
5.Drain engine coolant. Refer to CO-11, "
6.Drain inverter coolant from sub-radiator. Refer to HBC-617, "Replacement".
7.Disconnect radiator upper hose.
8.Remove air cleaner duct (front). Refer to EM-23, "
9.Remove sub radiator coolant reservoir tank.
10. Disconnect ECM.
11. R emove E C M and b racket a ssembly.
12. Disconnect cooling fan controller.
13. Remove radiator cooling fan assembly. CO-16, "
Changing Engine Coolant".
Removal and Installation".
Removal and Installation"
INSTALLATION
Installation is in the reverse order of removal.
•Radiator cooling fan is controlled by ECM. For details, refer to EC-59, "
System Description".
AWBIA0 055G
Disassembly and AssemblyINFOID:0000000001501532
DISASSEMBLY
CO-16
COOLING FAN
< ON-VEHICLE REPAIR >
1.Remove fan blades from fan motors.
2.Remove the fan motors from the shroud.
ASSEMBLY
Assembly is in the reverse order of disassembly.
[QR25DE]
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CO-17
P
WATER PUMP
B
< ON-VEHICLE REPAIR >
[QR25DE]
WATER PUMP
Removal and InstallationINFOID:0000000001501533
AWBIA0 004G
1. Water pump2. Gaskets3. Water pump housing
4. Water pipe5. O-ring
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
coolant escaping from the radiator.
REMOVAL
1.Drain coolant. Refer to CO-11, "Changing Engine Coolant".
CAUTION:
Perform when the engine is cold.
2.Remove engine undercover.
3.Remove drive belt. Refer to EM-15, "
4.Remove engine cover using power tools.
5.Remove air cleaner duct (front).
6.Remove engine coolant reservoir.
7.Remove RH wheel and tire assembly.
8.Remove fender protector. Refer to EXT-18, "
9.Remove engine ground strap.
10. Remove idler pulley bracket.
11. R emove t h e water p ump.
CAUTION:
•Handle the water pump vane so that it does not contact any other parts.
•Water pump cannot be disassembled and should be replaced as an assembly.
NOTE:
If necessary, the exhaust manifold catalytic convertor assembly must be removed to remove the water
pipe.
Removal and Installation".
Removal and Installation".
INSPECTION AFTER REMOVAL
CO-18
WATER PUMP
< ON-VEHICLE REPAIR >
•Visually check that there is no significant dirt or rusting on the
water pump body and vane.
•Check that there is no looseness in the vane shaft, and that it turns
smoothly when rotated by hand.
•If the water pump does not perform properly, replace the water
pump assembly.
INSTALLATION
Installation is in the reverse order of removal.
•When inserting water pipe end to cylinder block, apply a neutral detergent to O-ring. Then insert it immediately.
INSPECTION AFTER INSTALLATION
•After installing the water pump, check for leaks using the radiator cap tester. Refer to CO-10, "System
Inspection".
[QR25DE]
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CO-19
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THERMOSTAT AND THERMOSTAT HOUSING
B
< ON-VEHICLE REPAIR >
[QR25DE]
THERMOSTAT AND THERMOSTAT HOUSING
Removal and InstallationINFOID:0000000001501534
AWBIA0 005G
1. Thermostat 2. O-ring3. Engine coolant inlet
4. Water control valve5. Gasket6. Engine coolant outlet
7. Copper washer8. Engine coolant temperature sensor9. Heater pipe
A. To electronic throttle controlB. To oil coolerC. To heater
D. To heaterE. To electronic throttle controlF. To oil cooler
⇐ Engine front
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
coolant escaping from the radiator.
REMOVAL
CAUTION:
Perform when the engine is cold.
1.Drain engine coolant. Refer to CO-11, "
Changing Engine Coolant".
2.Remove engine under cover.
3.Remove air duct (front).
4.Remove radiator lower hose from the engine coolant inlet side.
5.Remove engine coolant inlet and thermostat.
INSPECTION AFTER REMOVAL
CO-20
THERMOSTAT AND THERMOSTAT HOUSING
< ON-VEHICLE REPAIR >
•Place a thread so that it is caught in the valves of the thermostat.
Immerse fully in a container filled with water. Heat while stirring.
•The valve opening temperature is the temperature at which the
valve opens and the falls from the thread.
•Continue heating. Check the full-open lift amount.
NOTE:
The full-open lift amount standard temperature for the thermostat is
the reference value.
• After checking the full-open lift amount, lower the water temperature and check the valve closing temperature.
Thermostat Standard Values
Val ve open ing temp erat ure80 .5 – 83. 5°C (177 – 182°F)
Val ve liftMo re t han 8 m m / 9 5°C (0.315 in / 203°F)
Val ve clos ing temp erat ure77 °C (171°F) or higher
INSTALLATION
Installation is in the reverse order of removal.
•Install the engine coolant temperature sensor.
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-15, "
and Sealants".
•Install the thermostat with the whole circumference of the flange
part fitting securely inside the rubber ring.
•Install the thermostat with the jiggle valve facing upwards. The
position deviation may be within the range of ±10°.
•If necessary, to install the heater pipe, first apply a mild detergent
to the O-ring and then quickly insert the pipe into the housing.
•Use a new gasket and O-ring for installation.
Recommended Chemical Products
[QR25DE]
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CO-21
WATER CONTROL VALVE
B
< ON-VEHICLE REPAIR >
[QR25DE]
WATER CONTROL VALVE
Removal and InstallationINFOID:0000000001501535
AWBIA0 005G
1. Thermostat 2. O-ring3. Engine coolant inlet
4. Water control valve5. Gasket6. Engine coolant outlet
7. Copper washer8. Engine coolant temperature sensor9. Heater pipe
A. To electronic throttle controlB. To oil coolerC. To heater
D. To heaterE. To electronic throttle controlF.To oil cooler
⇐ Engine front
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
coolant escaping from the radiator.
REMOVAL
CAUTION:
Perform when the engine cold.
1.Drain the engine coolant from the radiator and condensor assembly and sub-radiator. Refer to CO-11,
"Changing Engine Coolant".
2.Remove air cleaner assembly. Refer to EM-23, "
3.Remove engine room cover, using power tools.
4.Disconnect the upper radiator hose, heater pipe, electric throttle control actuator inlet hose, oil cooler
hose and heater hoses.
5.Remove the engine coolant temprature sensor.
6.Remove the engine coolant outlet.
7.Remove the water control valve.
Removal and Installation".
CO-22
WATER CONTROL VALVE
< ON-VEHICLE REPAIR >
INSPECTION AFTER REMOVAL
• Place a thread so that it is caught in the valve of the water control
valve. Immerse fully in a container filled with water. Heat while stirring.
•The valve opening temperature is the temperature at which the
valve opens and the falls from the thread.
•Continue heating. Check the full-open lift amount.
NOTE:
The full-open lift amount standard temperature for the water control valve is the reference value.
• After checking the full-open lift amount, lower the water temperature and check the valve closing temperature.
Standar d value s
Water Control Valve Standard Value
Val ve open ing temp erat ure93 .5° - 96.5°C (200° - 206°F)
Full-open lift amountMore than 8 mm / 108°C (0.315 in / 226° F)
Val ve clos ing temp erat ure90 °C (194° F) or higher
INSTALLATION
Installation is in the reverse order of removal.
•Install the engine coolant temperature sensor.
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-15, "
and Sealants".
•Install the water control valve with the whole circumference of the flange part fitting securely inside the rubber ring.
•Install the water control valve with the up-mark facing up and the frame center part facing upwards. The
position deviation may be within the range of ±10°.
•Use a new gasket and O-ring for installation.
Recommended Chemical Products
[QR25DE]
SLC252B
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CO-23
SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS)
[QR25DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
CapacityINFOID:0000000001501536
(US gal, Imp gal)
Coolant capacity (With reservoir tank at MAX level) 7.7 (2, 1 3/4)
ThermostatINFOID:0000000001501537
Val ve o pen ing temp erat ure80 .5 - 83. 5°C (177 - 182°F)
Val ve l iftMo re t han 8 m m / 9 5°C (0.315 in / 203°F)
Val ve c los ing tempe rat ure77 °C (171°F) or higher
Water Control ValveINFOID:0000000001501538
Val ve o pen ing tempe rat ure93 .5-9 6.5 °C (200-206°F)
Val ve l iftMo re t han 8 mm / 1 08°C (0.315 in / 226°F)
Val ve c los ing tempe rat ure90 °C (194°F) or higher
Removal and Installation ......................................... 36
DEF-2
< BASIC INSPECTION >
B
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000001502272
OVERALL SEQUENCE
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DETAILED FLOW
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DEF-3
DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
1. GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred).
>> GO TO 2
2. CHECK DTC
1.Check DTC.
2.Perform the following procedure if DTC is displayed.
-Record DTC and freeze frame data (Print them out with CONSULT-III.)
-Erase DTC.
-Study the relationship between the cause detected by DTC and the symptom described by the customer.
3.Check related service bulletins for information.
Is any symptom described and any DTC detected?
Symptom is described, DTC is displayed>>GO TO 3
Symptom is described, DTC is not displayed>>GO TO 4
Symptom is not described, DTC is displayed>>GO TO 5
3. CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in “DATA MONITOR” mode and check real time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 5
4. CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in “DATA MONITOR ” mode and check real time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 6
5. PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again.
At this time, always connect CONSULT-III to the vehicle, and check diagnostic results in real time.
If two or more DTCs are detected, refer to BCS-72, "
diagnosis order.
NOTE:
•Freeze frame data is useful if the DTC is not detected.
•Perform Component Function Check if DTC Confirmation Procedure is not included in Service Manual. This
simplified check procedure is an effective alternative though DTC cannot be detected during this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC Confirmation Procedure.
Is DTC detected?
YES>> GO TO 8
NO>> Refer to GI-42, "
Intermittent Incident".
DTC Inspection Priority Chart" and determine trouble
6. PERFORM BASIC INSPECTION
Perform DEF-3, "Work Flow".
Inspection End>>GO TO 7
7. DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE
Detect malfunctioning system according to DEF-6, "
step 4, and determine the trouble diagnosis order based on possible causes and symptom.
>> GO TO 8
System Description" based on the confirmed symptom in
DEF-4
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