2008 NISSAN TEANA heating

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ENGINE
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SECTION CO
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CONTENTS
ENGINE COOLING SYSTEM
FUNCTION DIAGNOSIS .. .............................2
DESCRIPTION ............................................... .....2
Engine Cooling System ..................................... ......2
Engine Cooling System Schematic .........................2
SYMPTOM DIAGNOSIS ...............................3
OVERHEATING CAUSE ANALYSIS ............. .....3
Troubleshooting Chart ........................................ ......3
PRECAUTION ...............................................5
PRECAUTIONS .............................................. .....5
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
5
Liquid Gasket ...........................................................5
PREPARATION ............................................7
PREPARATION .............................................. .....7
Special Service Tool ........................................... ......7
Commercial Service Tools .......................................7
ON-VEHICLE MAINTENANCE .....................8
ENGINE COOLANT ....................................... .....8
Inspection ............................................................ ......8
Draining .....................................................................8
Refilling .....................................................................9
Flushing ...................................................................10
RADIATOR .........................................................12
RADIATOR CAP .................................................... ....12
RADIATOR CAP : Inspection ..................................12
RADIATOR ............................................................ ....12
RADIATOR : Inspection ..........................................12
ON-VEHICLE REPAIR .................................13
RADIATOR ....... ................................ .................13
Exploded View ..................................................... ....13
Removal and Installation .........................................13
Inspection ................................................................15
COOLING FAN ..................................................16
Exploded View .........................................................16
Removal and Installation .........................................16
Disassembly and Assembly .....................................17
Inspection ................................................................17
WATER PUMP ..................................................18
Exploded View .........................................................18
Removal and Installation .........................................18
Inspection ................................................................21
WATER INLET AND THERMOSTAT ASSEM-
BLY ....................................................................
23
Exploded View .........................................................23
Removal and Installation .........................................23
Inspection ................................................................24
WATER OUTLET AND WATER PIPING ..........25
Exploded View .........................................................25
Removal and Installation .........................................25
Inspection ................................................................26
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
27
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
27
Periodical Maintenance Specification .................. ....27
Radiator ...................................................................27
Thermostat ..............................................................27

OVERHEATING CAUSE ANALYSIS
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< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000003793161
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat stuck closed —
Damaged finsDust contamination or pa-
per clogging
Physical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling 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 density —
Insufficient engine coolantEngine coolant leakageCooling hoseLoose clamp
Cracked hose
Water pump Poor sealing
Radiator capLoose
Poor sealing
RadiatorO-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tankExhaust gas leakage into
cooling systemCylinder head deterioration
Cylinder head gasket deteri-
oration

CO-4
< SYMPTOM DIAGNOSIS >
OVERHEATING CAUSE ANALYSIS
Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for ex-
tended time
Driving at extremely high
speed
Powertrain system malfunc-
tion
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or paper
clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

PRECAUTIONS
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< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003801896
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 AIRBAG” and “SEAT BELT” 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 AIRBAG”.
 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 har-
ness connectors.
Liquid GasketINFOID:0000000003793163
REMOVAL OF LIQUID GASKET SEALING
 After removing mounting nuts and bolts, separate the mating sur-
f a c e u s i n g t h e s e a l c u t t e r [ S S T: K V 1 0 1111 0 0 ( J37228)] (A) and
remove old liquid gasket sealing.
CAUTION:
Be careful not to damage the mating surfaces.
 Tap (B) the seal cutter [SST: KV10111100 (J37228)] to insert it, and
then slide (C) it by tapping on the side as shown in the figure.
 In areas where seal cutter [SST: KV10111100 (J37228)] is difficult
to use, use a plastic hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as a screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Using a scraper (A), remove old liquid gasket adhering to the liq-
uid gasket application surface and the mating surface.
 Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
2. Wipe the liquid gasket application surface and the mating sur-
face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.
JPBIA0052ZZ
JPBIA0053ZZ

REAR WINDOW DEFOGGER SYSTEM
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< FUNCTION DIAGNOSIS >
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WITH AV CONTROL UNIT : Component Parts LocationINFOID:0000000003806027
WITH AV CONTROL UNIT : Component DescriptionINFOID:0000000003806028
1. BCM M118, M119, M122, M123 2. IPDM E/R E11 3. Rear window defogger switch M125
(built-in multifunction switch)
4. Rear window defogger connector
B1265. Condenser B125 6. Rear window defogger connector
B303
7. AV control unit M129, M131
A. Behind the combination meter B. Engine room dash panel (LH) C. Behind rear pillar finisher (LH)
D. Behind rear pillar finisher (RH) E. Behind cluster lid C
JMLIA0150ZZ
BCM Operates the rear window defogger via rear window defogger switch
 Performs the timer control of rear window defogger
Rear window defogger relay Operates the rear window defogger and the door mirror defogger with the control signal from
BCM
IPDM E/R  Transmits rear window defogger control signal to AV control unit via CAN communication
Multifunction switch
(Rear window defogger
switch) The rear window defogger switch is installed
 Turns the indicator lamp ON when detecting the operation of rear window defogger
AV control unit Displays the rear window defogger is ON on the display when detecting the operation of rear
window defogger
Rear window defogger Heats the heating wire with the power supply from the rear window defogger relay to prevent
the rear window from fogging up
Door mirror defogger Heats the heating wire with the power supply from the rear window defogger relay to prevent
the door mirror from fogging up

REAR WINDOW DEFOGGER SYSTEM
DEF-7
< FUNCTION DIAGNOSIS >
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WITHOUT AV CONTROL UNIT : Component Parts LocationINFOID:0000000003806031
WITHOUT AV CONTROL UNIT : Component DescriptionINFOID:0000000003806032
1. BCM M118, M119, M122, M123 2. IPDM E/R E11 3. Rear window defogger switch M95
(built-in A/C control)
4. Rear window defogger connector
B1265. Condenser B125 6. Rear window defogger connector
B303
7. A/C auto amp. M50
A. Behind the combination meter B. Engine room dash panel (LH) C. Behind rear pillar finisher (LH)
D. Behind rear pillar finisher (RH) E. Behind cluster lid C
JMLIA0151ZZ
BCM Operates the rear window defogger with the operation of rear window defogger switch
 Performs the timer control of rear window defogger
Rear window defogger relay Operates the rear window defogger and the door mirror defogger with the control signal from
BCM
IPDM E/R  Transmit rear window defogger control signal to ECM via CAN communication
A/C control
(Rear window defogger
switch) The rear window defogger switch is installed
 Turns the indicator lamp ON when detecting the operation of rear window defogger
A/C auto amp. Displays the rear window defogger ON to the display when detecting the operation of rear win-
dow defogger
Rear window defogger Heats the heating wire with the power supply from the rear window defogger relay to prevent
the rear window from fogging up
Door mirror defogger Heats the heating wire with the power supply from the rear window defogger relay to prevent
the door mirror from fogging up

DEF-14
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER RELAY
REAR WINDOW DEFOGGER RELAY
DescriptionINFOID:0000000003857611
Power is supplied to the rear window defogger with BCM control.
Component Function CheckINFOID:0000000003857612
1.CHECK FUNCTION
1. Perform Active Test (“REAR DEFOGGER”) with CONSULT-III.
2. Touch “ON”.
3. Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES >> Rear window defogger relay power supply circuit function is OK.
NO >> Refer to DEF-14, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000003857613
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse [No.3, located in fuse block (J/B)].
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK REAR WINDOW DEFOGGER RELAY CIRCUIT 1
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> Rear window defogger relay power supply circuit is OK.
NO >> GO TO 3.
3.CHECK REAR WINDOW DEFOGGER RELAY CIRCUIT 2
1. Turn ignition switch OFF.
2. Disconnect BCM connector and fuse block (J/B).
3. Check continuity between BCM harness connector and fuse block (J/B) harness connector.
4. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
(+)
(–) ConditionVoltage (V)
(Approx.) BCM
Connector Terminal
M123 151 GroundRear window de-
fogger switchON 0
OFF Battery voltage
BCM Fuse block (J/B)
Continuity
Connector Terminal Connector Terminal
M123 151 M2 4B Existed
BCM
GroundContinuity
Connector Terminal
M123 151 Not existed

DEF-16
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER
REAR WINDOW DEFOGGER
DescriptionINFOID:0000000003857615
Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window
from fogging up.
Component Function CheckINFOID:0000000003857616
1.CHECK REAR WINDOW DEFOGGER
1. Perform Active Test (“REAR DEFOGGER”) with CONSULT-III.
2. Touch “ON”.
3. Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES >> Rear window defogger is OK.
NO >> Refer to DEF-16, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000003857617
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 20A fuse [No.15, located in fuse block (J/B)].
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger connector.
3. Check continuity between rear window defogger harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace harness.
4.CHECK REAR WINDOW DEFOGGER CIRCUIT 1
1. Turn ignition switch OFF.
2. Disconnect condenser connector and rear window defogger connector.
(+)
(–) Condition Voltage (V)
(Approx.) Rear window defogger
Connector Terminal
B303 1 GroundRear window de-
fogger switchON Battery voltage
OFF 0
Rear window defogger
GroundContinuity
Connector Terminal
B126 2 Existed