overheating NISSAN X-TRAIL 2003 Electronic Repair Manual

AT-8
PRECAUTIONS
lVehicle has TCC shudder and/or no TCC apply. Replace only after all hydraulic and electrical diagnoses
have been made. (Converter clutch material may be glazed.)
lConverter is contaminated with engine coolant containing antifreeze.
lInternal failure of stator roller clutch.
lHeavy clutch debris due to overheating (blue converter).
lSteel particles or clutch lining material found in fluid filter or on magnet when no internal parts in unit are
worn or damaged — indicates that lining material came from converter.
The torque converter should not be replaced if:
lThe fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.
lThe threads in one or more of the converter bolt holes are damaged.
lTransaxle failure did not display evidence of damaged or worn internal parts, steel particles or clutch plate
lining material in unit and inside the fluid filter.
lVehicle has been exposed to high mileage (only). The exception may be where the torque converter
clutch dampener plate lining has seen excess wear by vehicles operated in heavy and/or constant traffic,
such as taxi, delivery or police use.
EURO-OBD SELF-DIAGNOSIS — EURO-OBD —
lA/T self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through
the blinking pattern of the O/D OFF indicator lamp or the malfunction indicator lamp (MIL). Refer to the
table onAT-42, "
SELF-DIAGNOSTIC RESULT TEST MODE"for the indicator used to display each self-
diagnostic result.
lThe self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM mem-
ories.
Always perform the procedure “HOW TO ERASE DTC” onAT-39, "
HOW TO ERASE DTC"to com-
plete the repair and avoid unnecessary blinking of the MIL.
lThe following self-diagnostic items can be detected using ECM self-diagnostic results mode* only when
the O/D OFF indicator lamp does not indicate any malfunctions.
–PNP switch
–A/T 1st, 2nd, 3rd, or 4th gear function
*: For details of EURO-OBD, refer toAT - 3 7 , "
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION".
lCertain systems and components, especially those related to EURO-OBD, may use a new style
slide-locking type harness connector.
For description and how to disconnect, refer toPG-70, "
HARNESS CONNECTOR".
Wiring Diagrams and Trouble DiagnosisECS004Q4
When you read wiring diagrams, refer to the following:
lGI-14, "How to Read Wiring Diagrams".
lPG-2, "POWER SUPPLY ROUTING".
When you perform trouble diagnosis, refer to the following:
lGI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES".
l"", “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”

AT-64
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
TROUBLE DIAGNOSIS — BASIC INSPECTION
PFP:00000
A/T Fluid CheckECS0 04 QQ
FLUID LEAKAGE CHECK
1. Clean area suspected of leaking. — for example, mating surface
of converter housing and transmission case.
2. Start engine, apply foot brake, place selector lever in “D” posi-
tion and wait a few minutes.
3. Stop engine.
4. Check for fresh leakage.
FLUID CONDITION CHECK
FLUID LEVEL CHECK
Refer to “Checking A/T Fluid”,AT-13, "A/T FLUID".
SAT767B
SAT288G
Fluid color Suspected problem
Dark or black with burned odor Wear of frictional material
Milky pink Water contamination — Road water
entering through filler tube or breather
Varnished fluid, light to dark brown and
tackyOxidation — Over or under filling, —
Overheating
SAT638A

AT-286
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
TROUBLE DIAGNOSIS — BASIC INSPECTION
PFP:00000
A/T Fluid CheckECS004VR
FLUID LEAKAGE CHECK
1. Clean area suspected of leaking. — for example, mating surface
of converter housing and transmission case.
2. Start engine, apply foot brake, place selector lever in “D” posi-
tion and wait a few minutes.
3. Stop engine.
4. Check for fresh leakage.
FLUID CONDITION CHECK
FLUID LEVEL CHECK
Refer to “Checking A/T Fluid”,AT-13, "A/T FLUID".
SAT767B
SAT288G
Fluid color Suspected problem
Dark or black with burned odor Wear of frictional material
Milky pink Water contamination — Road water
entering through filler tube or breather
Varnished fluid, light to dark brown and
tackyOxidation — Over or under filling, —
Overheating
SAT638A

TROUBLE DIAGNOSIS
BRC-31
[4WD/ABS]
C
D
E
G
H
I
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K
L
MA
B
BRC
Continuity exists, resistance value
Insulation inspection
lCheck resistance value between each pair of ABS solenoid E70 and E71 terminals (No.1 (L), 2 ((R/B) 3
(L/W), 12 (Y/G), 25 (L/Y), 26 (B/Y), 27 (L/R), 28 (W/G).
ABS motor operation inspection
1. Connect 2-pin connector on ABS actuator E69 terminals No. 9
(R/B) and No. 10 (Y).
2. Apply voltage of Approx. 12V voltage between terminals E70
No. 5 (G/R) and terminals E71 No. 7 (W/G) on ABS relay unit.
Measure motor voltage (terminal E70 No. 4 (R/Y) - Body
ground) using an oscilloscope and check motor counter electro-
motive force duration when operation stops.
CAUTION:
lBefore measuring time, check each part of ABS relay unit
and confirm motor relay is normal.
lTo prevent overheating, ABS motor should be driven no
longer than 4 seconds.
lMotor counter electromotive force duration is based on the
time at 20°C, in ambient temperatures, with 12V battery volt-
age. If battery voltage is low, time will be slightly shorter.
SFIA0353E
Standard : 5.8 - 21.2 (W)
Motor counter electromotive force duration:
0.1 second or longer
SFIA0354E

CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
C
D
E
F
G
H
I
J
K
L
M
SECTION
A
CO
ENGINE COOLING SYSTEM
QR20DE
PRECAUTIONS .......................................................... 3
Precautions For Liquid Gasket ................................. 3
REMOVAL OF LIQUID GASKET .......................... 3
LIQUID GASKET APPLICATION PROCEDURE..... 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
OVERHEATING CAUSE ANALYSIS .......................... 5
Troubleshooting Chart .............................................. 5
COOLING SYSTEM .................................................... 7
Cooling Circuit .......................................................... 7
ENGINE COOLANT .................................................... 9
Inspection ................................................................. 9
LEVEL CHECK ..................................................... 9
LEAK CHECK ....................................................... 9
Changing Engine Coolant ........................................ 9
DRAINING ENGINE COOLANT ........................... 9
REFILLING ENGINE COOLANT ........................ 10
FLUSHING COOLING SYSTEM ......................... 10
RADIATOR ................................................................ 12
Removal and Installation ........................................ 12
REMOVAL ........................................................... 12
INSTALLATION ................................................... 12
Disassembly and Assembly Radiator Fan ............. 13
DISASSEMBLY ................................................... 13
ASSEMBLY ......................................................... 13
INSPECTION ......................................................... 13
CHECKING RADIATOR CAP .............................. 13
CHECKING RADIATOR ...................................... 14
RADIATOR (ALUMINUM TYPE) .............................. 15
Disassembly and Assembly ................................... 15
PREPARATION ................................................... 15
DISASSEMBLY ................................................... 15
ASSEMBLY ......................................................... 16
INSPECTION ...................................................... 18WATER PUMP .......................................................... 19
Removal and Installation ........................................ 19
REMOVAL ........................................................... 19
INSPECTION AFTER REMOVAL ....................... 20
INSTALLATION ................................................... 20
INSPECTION AFTER INSTALLATION ................ 20
THERMOSTAT AND WATER CONTROL VALVE .... 21
Removal and Installation ........................................ 21
REMOVAL ........................................................... 21
INSPECTION AFTER REMOVAL ....................... 22
INSTALLATION ................................................... 22
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 23
Capacity .................................................................. 23
Thermostat ............................................................. 23
Water Control Valve ................................................ 23
Radiator .................................................................. 23
Tightening Torque ................................................... 23
YD22DDTi
PRECAUTIONS ........................................................ 24
Precautions For Liquid Gasket ............................... 24
REMOVAL AND LIQUID GASKET ...................... 24
LIQUID GASKET APPLICATION PROCEDURE... 24
PREPARATION ......................................................... 25
Special Service Tools ............................................. 25
OVERHEATING CAUSE ANALYSIS ........................ 26
Troubleshooting Chart ............................................ 26
COOLING SYSTEM .................................................. 28
Cooling Circuit ........................................................ 28
ENGINE COOLANT .................................................. 30
Inspection ............................................................... 30
LEVEL CHECK .................................................... 30
LEAK CHECK ...................................................... 30
Changing Engine Coolant ....................................... 30
DRAINING ENGINE COOLANT .......................... 30
REFILLING ENGINE COOLANT ......................... 31
FLUSHING COOLING SYSTEM ......................... 32
RADIATOR ................................................................ 33
Removal and Installation ........................................ 33

OVERHEATING CAUSE ANALYSIS
CO-5
[QR20DE]
C
D
E
F
G
H
I
J
K
L
MA
CO
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartEBS009SB
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
Mechanical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ate
—— High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper coolant mixture
ratio———
Poor coolant quality — — —
Insufficient coolantCoolant 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

CO-6
[QR20DE]
OVERHEATING CAUSE ANALYSIS
Except cool-
ing system
parts mal-
function— OverloadonengineAbusive 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
—
Installed large fog lamp Symptom Check items

CO-26
[YD22DDTi]
OVERHEATING CAUSE ANALYSIS
OVERHEATING CAUSE ANALYSIS
PFP:00012
Troubleshooting ChartEBS00BAW
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
Mechanical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ate
—— High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper coolant mixture
ratio———
Poor coolant quality — — —
Insufficient coolantCoolant 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-27
[YD22DDTi]
C
D
E
F
G
H
I
J
K
L
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
—
Installed large fog lamp Symptom Check items

EC-4
ECM Terminals and Reference Value ...................260
On Board Diagnosis Logic ....................................261
DTC Confirmation Procedure ...............................261
Wiring Diagram .....................................................262
Diagnostic Procedure ...........................................263
Component Inspection ..........................................264
Removal and Installation ......................................265
D T C P 1111 I V T C ON T R OL S OL E N OI D VA LV E . .. ..266
Component Description ........................................266
CONSULT-II Reference Value in Data Monitor Mode
.266
ECM Terminals and Reference Value ...................266
On Board Diagnosis Logic ....................................266
DTC Confirmation Procedure ...............................267
Wiring Diagram .....................................................268
Diagnostic Procedure ...........................................269
Component Inspection ..........................................270
Removal and Installation ......................................270
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR .............................................................271
Description ............................................................271
On Board Diagnosis Logic ....................................271
DTC Confirmation Procedure ...............................271
Diagnostic Procedure ...........................................272
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION ..............................................................273
Description ............................................................273
ECM Terminals and Reference Value ...................273
On Board Diagnosis Logic ....................................273
DTC Confirmation Procedure ...............................274
Wiring Diagram .....................................................275
Diagnostic Procedure ...........................................276
Component Inspection ..........................................277
DTC P1123 THROTTLE CONTROL MOTOR RELAY.279
Component Description ........................................279
CONSULT-II Reference Value in Data Monitor Mode
.279
ECM Terminals and Reference Value ...................279
On Board Diagnosis Logic ....................................279
DTC Confirmation Procedure ...............................279
Wiring Diagram .....................................................281
Diagnostic Procedure ...........................................282
Component Inspection ..........................................283
DTC P1143 HO2S1 .................................................284
Component Description ........................................284
CONSULT-II Reference Value in Data Monitor Mode
.284
ECM Terminals and Reference Value ...................284
On Board Diagnosis Logic ....................................285
DTC Confirmation Procedure ...............................285
Overall Function Check ........................................286
Diagnostic Procedure ...........................................286
Component Inspection ..........................................288
Removal and Installation ......................................289
DTC P1144 HO2S1 .................................................290
Component Description ........................................290
CONSULT-II Reference Value in Data Monitor Mode
.290ECM Terminals and Reference Value ................... 290
On Board Diagnosis Logic .................................... 291
DTC Confirmation Procedure ................................ 291
Overall Function Check ......................................... 292
Diagnostic Procedure ............................................ 292
Component Inspection .......................................... 294
Removal and Installation ....................................... 295
DTC P1146 HO2S2 .................................................. 296
Component Description ........................................ 296
CONSULT-II Reference Value in Data Monitor Mode
. 296
ECM Terminals and Reference Value ................... 296
On Board Diagnosis Logic .................................... 296
DTC Confirmation Procedure ................................ 297
Overall Function Check ......................................... 298
Wiring Diagram ..................................................... 299
Diagnostic Procedure ............................................ 300
Component Inspection .......................................... 301
Removal and Installation ....................................... 302
DTC P1147 HO2S2 .................................................. 303
Component Description ........................................ 303
CONSULT-II Reference Value in Data Monitor Mode
. 303
ECM Terminals and Reference Value ................... 303
On Board Diagnosis Logic .................................... 303
DTC Confirmation Procedure ................................ 304
Overall Function Check ......................................... 305
Wiring Diagram ..................................................... 306
Diagnostic Procedure ............................................ 307
Component Inspection .......................................... 308
Removal and Installation ....................................... 309
DTC P1212 ESP/TCS/ABS COMMUNICATION
LINE ......................................................................... 310
Description ............................................................ 310
On Board Diagnosis Logic .................................... 310
DTC Confirmation Procedure ................................ 310
Diagnostic Procedure ............................................ 310
DTC P1217 ENGINE OVER TEMPERATURE ........311
System Description ...............................................311
CONSULT-II Reference Value in Data Monitor Mode
.311
ECM Terminals and Reference Value ................... 312
On Board Diagnosis Logic .................................... 312
Overall Function Check ......................................... 312
Wiring Diagram ..................................................... 315
Diagnostic Procedure ............................................ 316
Main 12 Causes of Overheating ........................... 323
Component Inspection .......................................... 324
DTC P1706 PNP SWITCH ....................................... 325
Component Description ........................................ 325
CONSULT-II Reference Value in Data Monitor Mode
. 325
ECM Terminals and Reference Value ................... 325
On Board Diagnosis Logic .................................... 325
DTC Confirmation Procedure ................................ 325
Overall Function Check ......................................... 326
Wiring Diagram ..................................................... 327
Diagnostic Procedure ............................................ 328