2003 NISSAN TEANA heating

OVERHEATING CAUSE ANALYSIS
CO-7
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Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Power train system mal-
function
— 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

THERMOSTAT AND WATER CONTROL VALVE
CO-25
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INSPECTION AFTER REMOVAL

Place a string so that it is caught in the valves of thermostat and
water control valve. Immerse fully in a container filled with water.
Heat while stirring. (The example in the figure shows thermo-
stat.)

The valve opening temperature is the temperature at which the
valve opens and falls from the thread.

Continue heating. Check the maximum valve lift amount.
NOTE:
The maximum valve lift amount standard temperature for water
control valve is the reference value.

After checking the maximum valve lift amount, lower the water
temperature and check the valve closing temperature.
Standard:

If out of the standard, replace either or both thermostat and water control valve.
INSTALLATION
Note the following, and install in the reverse order of removal.
Thermostat and Water Control Valve

Install thermostat with making rubber ring groove fit to thermo-
stat flange with the whole circumference. (The example in the
figure shows thermostat.)
NOTE:
Same procedure is applied for installation of water control valve.

Install thermostat with jiggle valve facing upwards. (The position
deviation may be within the range of 20 degrees as shown in the
figure.)

Install water control valve with the arrow facing up and the frame
center part facing upwards. (The position deviation may be
within the range of 20 degrees as shown in the figure.)
Heater Pipe Installation
Apply a neutral detergent to O-ring, then quickly insert the insertion part of heater pipe into cylinder block.
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301] and a radiator cap
tester (commercial service tool). Refer to CO-10, "
LEAK CHECK" .

Start and warm up engine. Visually check if there is no leaks of engine coolant and A/T fluid.
SLC252B
Items Thermostat Water control valve
Valve opening temperature 80.5 - 83.5°C (177 - 182°F) 93.5 - 96.5°C (200 - 206°F)
Maximum valve lift 8 mm/ 95°C (0.315 in/ 203°F) 8 mm/ 108°C (0.315 in/ 226°F)
Valve closing temperature 77°C (171°F) 90°C (194°F)
PBIC0157E
PBIC0158E

PRECAUTIONS
CO-27
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[VQ]PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
BBS004WR
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. 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 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 GasketBBS004WS
REMOVAL OF LIQUID GASKET SEALING

After removing mounting nuts and bolts, separate the mating
surface using seal cutter (SST) and remove old liquid gasket
sealing.
CAUTION:
Be careful not to damage the mating surfaces.

Tap seal cutter to insert it, and then slide it by tapping on the
side as shown in the figure.

In areas where seal cutter (SST) is difficult to use, use plastic
hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Using scraper, remove old liquid gasket adhering to the liquid
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.
3. Attach liquid gasket tube to tube presser (SST).
Use Genuine Liquid Gasket or equivalent.
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.
PBIC0275E
PBIC0003E
PBIC2160E

CO-30
[VQ]
OVERHEATING CAUSE ANALYSIS

OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartBBS004WV
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat stuck closed —
Damaged finsDust contamination or
paper 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 viscosity —
Insufficient engine coolantEngine coolant leaksCooling 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 leaks into
cooling systemCylinder head deterioration
Cylinder head gasket dete-
rioration

OVERHEATING CAUSE ANALYSIS
CO-31
[VQ]
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MA
CO

Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh 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
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

CVT-192
CVT FLUID COOLER SYSTEM

INSTALLATION
Note the following, and install in the reverse order of removal.

After completing installation, check for engine coolant leakage, engine coolant level, and the positions of
CVT. Refer to CO-34, "
Inspection" and CVT-179, "Checking of CVT Position" .
CAUTION:

Install hose clamp with tabs aligned with markings of CVT fluid cooler valve assembly and each
hose.

Do not reuse CVT fluid cooler inlet tube assembly and CVT fluid cooler outlet tube assembly.

Apply LLC around O-ring when installing CVT fluid cooler inlet tube and CVT fluid cooler outlet
tube assembly to CVT fluid cooler valve assembly.
COMPONENT INSPECTION
1. Make sure that CVT fluid cooler valve is fully opened at room
temperature.
2. Put CVT fluid cooler valve into a water-filled container, and then
heat it up to 82°C (180°F) or more for 10 minutes or more.
3. Make sure that CVT fluid cooler valve is fully closed.Standard
Dimension A from CVT fluid cooler valve port end
to tip of valve shaft
(At room temperature):
Approx 72.0 mm (2.835 in) or more
SCIA7399E
SCIA2710E
Standard
Dimension A from CVT fluid cooler valve port end
to tip of valve shaft
[When heating to 82°C (180°F) or more for 10 min-
utes or more]:
Approx 66.5 mm (2.618 in) or less
SCIA7399E

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On Board Diagnosis Logic ................................... 193
DTC Confirmation Procedure ............................... 193
Wiring Diagram .................................................... 194
Diagnostic Procedure ........................................... 195
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................ 197
Component Description ........................................ 197
On Board Diagnosis Logic ................................... 197
DTC Confirmation Procedure ............................... 197
Diagnostic Procedure ........................................... 198
Removal and Installation ...................................... 199
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION .............................................................. 200
Description ........................................................... 200
On Board Diagnosis Logic ................................... 200
DTC Confirmation Procedure ............................... 200
Wiring Diagram .................................................... 201
Diagnostic Procedure ........................................... 202
Component Inspection ......................................... 206
Removal and Installation ...................................... 206
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .................................................................... 207
Component Description ........................................ 207
CONSULT-II Reference Value in Data Monitor Mode
. 207
On Board Diagnosis Logic ................................... 207
DTC Confirmation Procedure ............................... 207
Wiring Diagram .................................................... 209
Diagnostic Procedure ........................................... 210
DTC P1128 THROTTLE CONTROL MOTOR ........ 213
Component Description ........................................ 213
On Board Diagnosis Logic ................................... 213
DTC Confirmation Procedure ............................... 213
Wiring Diagram .................................................... 214
Diagnostic Procedure ........................................... 215
Component Inspection ......................................... 216
Removal and Installation ...................................... 217
DTC P1217 ENGINE OVER TEMPERATURE ....... 218
System Description .............................................. 218
CONSULT-II Reference Value in Data Monitor Mode
. 219
On Board Diagnosis Logic ................................... 219
Overall Function Check ........................................ 220
Wiring Diagram .................................................... 222
Diagnostic Procedure ........................................... 224
Main 12 Causes of Overheating ........................... 227
Component Inspection ......................................... 228
DTC P1225 TP SENSOR ........................................ 229
Component Description ........................................ 229
On Board Diagnosis Logic ................................... 229
DTC Confirmation Procedure ............................... 229
Diagnostic Procedure ........................................... 230
Removal and Installation ...................................... 230
DTC P1226 TP SENSOR ........................................ 231
Component Description ........................................ 231
On Board Diagnosis Logic ................................... 231
DTC Confirmation Procedure ............................... 231
Diagnostic Procedure ........................................... 232
Removal and Installation ...................................... 232DTC P1229 SENSOR POWER SUPPLY ................233
On Board Diagnosis Logic ....................................233
DTC Confirmation Procedure ...............................233
Wiring Diagram .....................................................234
Diagnostic Procedure ...........................................236
DTC P1706 PNP SWITCH ......................................238
Component Description ........................................238
CONSULT-II Reference Value in Data Monitor Mode
.238
On Board Diagnosis Logic ....................................238
Overall Function Check ........................................238
Wiring Diagram .....................................................239
Diagnostic Procedure ...........................................240
DTC P1720 VSS ......................................................243
Description ............................................................243
CONSULT-II Reference Value in Data Monitor Mode
.243
On Board Diagnosis Logic ....................................243
DTC Confirmation Procedure ...............................243
Diagnostic Procedure ...........................................244
DTC P1805 BRAKE SWITCH .................................245
Description ............................................................245
CONSULT-II Reference Value in Data Monitor Mode
.245
On Board Diagnosis Logic ....................................245
DTC Confirmation Procedure ...............................245
Wiring Diagram .....................................................247
Diagnostic Procedure ...........................................248
Component Inspection ..........................................250
DTC P2122, P2123 APP SENSOR .........................251
Component Description ........................................251
CONSULT-II Reference Value in Data Monitor Mode
.251
On Board Diagnosis Logic ....................................251
DTC Confirmation Procedure ...............................252
Wiring Diagram .....................................................253
Diagnostic Procedure ...........................................254
Component Inspection ..........................................256
Removal and Installation ......................................257
DTC P2127, P2128 APP SENSOR .........................258
Component Description ........................................258
CONSULT-II Reference Value in Data Monitor Mode
.258
On Board Diagnosis Logic ....................................258
DTC Confirmation Procedure ...............................259
Wiring Diagram .....................................................260
Diagnostic Procedure ...........................................261
Component Inspection ..........................................264
Removal and Installation ......................................264
DTC P2135 TP SENSOR ........................................265
Component Description ........................................265
CONSULT-II Reference Value in Data Monitor Mode
.265
On Board Diagnosis Logic ....................................265
DTC Confirmation Procedure ...............................266
Wiring Diagram .....................................................267
Diagnostic Procedure ...........................................268
Component Inspection ..........................................271
Removal and Installation ......................................271

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DTC P1212 TCS COMMUNICATION LINE ............ 574
Description ........................................................... 574
On Board Diagnosis Logic ................................... 574
DTC Confirmation Procedure ............................... 574
Diagnostic Procedure ........................................... 574
DTC P1217 ENGINE OVER TEMPERATURE ....... 575
System Description .............................................. 575
CONSULT-II Reference Value in Data Monitor Mode
. 576
On Board Diagnosis Logic ................................... 577
Overall Function Check ........................................ 577
Wiring Diagram .................................................... 579
Diagnostic Procedure ........................................... 581
Main 12 Causes of Overheating ........................... 584
Component Inspection ......................................... 585
DTC P1225 TP SENSOR ........................................ 586
Component Description ........................................ 586
On Board Diagnosis Logic ................................... 586
DTC Confirmation Procedure ............................... 586
Diagnostic Procedure ........................................... 587
Removal and Installation ...................................... 587
DTC P1226 TP SENSOR ........................................ 588
Component Description ........................................ 588
On Board Diagnosis Logic ................................... 588
DTC Confirmation Procedure ............................... 588
Diagnostic Procedure ........................................... 589
Removal and Installation ...................................... 589
DTC P1229 SENSOR POWER SUPPLY ................ 590
On Board Diagnosis Logic ................................... 590
DTC Confirmation Procedure ............................... 590
Wiring Diagram .................................................... 591
Diagnostic Procedure ........................................... 592
DTC P1564 ASCD STEERING SWITCH ................ 595
Component Description ........................................ 595
CONSULT-II Reference Value in Data Monitor Mode
. 595
On Board Diagnosis Logic ................................... 595
DTC Confirmation Procedure ............................... 596
Wiring Diagram .................................................... 597
Diagnostic Procedure ........................................... 598
Component Inspection ......................................... 601
DTC P1572 ASCD BRAKE SWITCH ..................... 602
Component Description ........................................ 602
CONSULT-II Reference Value in Data Monitor Mode
. 602
On Board Diagnosis Logic ................................... 602
DTC Confirmation Procedure ............................... 603
Overall Function Check ........................................ 604
Wiring Diagram .................................................... 605
Diagnostic Procedure ........................................... 606
Component Inspection ......................................... 610
DTC P1574 ASCD VEHICLE SPEED SENSOR .....611
Component Description ......................................... 611
On Board Diagnosis Logic .................................... 611
DTC Confirmation Procedure ................................ 611
Diagnostic Procedure ........................................... 612
DTC P1700 CVT CONTROL SYSTEM ................... 613
Description ........................................................... 613DTC P1706 PNP SWITCH ......................................614
Component Description ........................................614
CONSULT-II Reference Value in Data Monitor Mode
.614
On Board Diagnosis Logic ....................................614
Overall Function Check ........................................614
Wiring Diagram .....................................................615
Diagnostic Procedure ...........................................618
DTC P1715 INPUT SPEED SENSOR (PRIMARY
SPEED SENSOR) ...................................................622
Description ............................................................622
CONSULT-II Reference Value in Data Monitor Mode
.622
On Board Diagnosis Logic ....................................622
DTC Confirmation Procedure ...............................622
Diagnostic Procedure ...........................................623
DTC P1720 VSS ......................................................624
Description ............................................................624
CONSULT-II Reference Value in Data Monitor Mode
.624
On Board Diagnosis Logic ....................................624
DTC Confirmation Procedure ...............................624
Diagnostic Procedure ...........................................625
DTC P1805 BRAKE SWITCH .................................626
Description ............................................................626
CONSULT-II Reference Value in Data Monitor Mode
.626
On Board Diagnosis Logic ....................................626
DTC Confirmation Procedure ...............................626
Wiring Diagram .....................................................627
Diagnostic Procedure ...........................................628
Component Inspection ..........................................630
DTC P2122, P2123 APP SENSOR .........................631
Component Description ........................................631
CONSULT-II Reference Value in Data Monitor Mode
.631
On Board Diagnosis Logic ....................................631
DTC Confirmation Procedure ...............................632
Wiring Diagram .....................................................633
Diagnostic Procedure ...........................................634
Component Inspection ..........................................637
Removal and Installation ......................................637
DTC P2127, P2128 APP SENSOR .........................638
Component Description ........................................638
CONSULT-II Reference Value in Data Monitor Mode
.638
On Board Diagnosis Logic ....................................638
DTC Confirmation Procedure ...............................639
Wiring Diagram .....................................................640
Diagnostic Procedure ...........................................641
Component Inspection ..........................................644
Removal and Installation ......................................644
DTC P2135 TP SENSOR ........................................645
Component Description ........................................645
CONSULT-II Reference Value in Data Monitor Mode
.645
On Board Diagnosis Logic ....................................645
DTC Confirmation Procedure ...............................646
Wiring Diagram .....................................................647