2003 NISSAN X-TRAIL overheating

CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION
A
CO

ENGINE COOLING SYSTEM
QR
PRECAUTIONS .......................................................... 3
Precautions for Liquid Gasket .................................. 3
LIQUID GASKET APPLICATION PROCEDURE ..... 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 4
OVERHEATING CAUSE ANALYSIS .......................... 5
Troubleshooting Chart .............................................. 5
COOLING SYSTEM .................................................... 7
Cooling Circuit .......................................................... 7
System Chart ........................................................... 8
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 ................................................... 13
INSPECTION AFTER INSTALLATION ............... 13
Checking Radiator Cap .......................................... 13
Checking Radiator .................................................. 13
RADIATOR (ALUMINUM TYPE) .............................. 14
Disassembly and Assembly ................................... 14
PREPARATION ................................................... 14
DISASSEMBLY ................................................... 14
ASSEMBLY ......................................................... 15
INSPECTION ...................................................... 17
COOLING FAN ......................................................... 18
Removal and Installation ........................................ 18
REMOVAL ........................................................... 18
INSTALLATION ................................................... 18
DISASSEMBLY AND ASSEMBLY ...................... 18WATER PUMP .......................................................... 20
Removal and Installation ........................................ 20
REMOVAL ........................................................... 20
INSPECTION AFTER REMOVAL ....................... 21
INSTALLATION ................................................... 21
INSPECTION AFTER INSTALLATION ................ 21
THERMOSTAT AND WATER CONTROL VALVE .... 22
Removal and Installation ........................................ 22
REMOVAL ........................................................... 22
INSPECTION AFTER REMOVAL ....................... 23
INSTALLATION ................................................... 23
INSPECTION AFTER INSTALLATION ................ 23
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 24
Standard and Limit .................................................. 24
CAPACITY ........................................................... 24
THERMOSTAT .................................................... 24
WATER CONTROL VALVE ................................. 24
RADIATOR .......................................................... 24
Tightening Torque ................................................... 24
YD22DDTi
PRECAUTIONS ........................................................ 25
Precautions For Liquid Gasket ............................... 25
LIQUID GASKET APPLICATION PROCEDURE ... 25
PREPARATION ......................................................... 26
Special Service Tools ............................................. 26
Commercial Service Tools ...................................... 26
OVERHEATING CAUSE ANALYSIS ........................ 27
Troubleshooting Chart ............................................ 27
COOLING SYSTEM .................................................. 29
Cooling Circuit ........................................................ 29
System Chart .......................................................... 30
ENGINE COOLANT .................................................. 31
Inspection ............................................................... 31
LEVEL CHECK .................................................... 31

OVERHEATING CAUSE ANALYSIS
CO-5
[QR]
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OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartEBS00KOD
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat and water con-
trol valve 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

CO-6
[QR]
OVERHEATING CAUSE ANALYSIS

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

OVERHEATING CAUSE ANALYSIS
CO-27
[YD22DDTi]
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G
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L
MA
CO

OVERHEATING CAUSE ANALYSISPFP: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
Physical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ateRefer to DTC in EC1217
(cooling system)
— High resistance to fan rota-
tion
Fan assembly
Damaged fan blades
Damaged radiator shroud — — —
Improper engine coolant
mixture ratio—— —
Poor engine coolant quality — Engine coolant density —
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

CO-28
[YD22DDTi]
OVERHEATING CAUSE ANALYSIS

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

EC-4 CONSULT-II Reference Value in Data Monitor Mode
.302
On Board Diagnosis Logic ....................................302
DTC Confirmation Procedure ...............................302
Wiring Diagram .....................................................304
Diagnostic Procedure ...........................................307
Component Inspection ..........................................309
DTC P1128 THROTTLE CONTROL MOTOR .........310
Component Description ........................................310
On Board Diagnosis Logic ....................................310
DTC Confirmation Procedure ...............................310
Wiring Diagram .....................................................311
Diagnostic Procedure ...........................................315
Component Inspection ..........................................316
Removal and Installation ......................................317
DTC P1143 HO2S1 .................................................318
Component Description ........................................318
CONSULT-II Reference Value in Data Monitor Mode
.318
On Board Diagnosis Logic ....................................318
DTC Confirmation Procedure ...............................319
Overall Function Check ........................................319
Diagnostic Procedure ...........................................320
Component Inspection ..........................................322
Removal and Installation ......................................323
DTC P1144 HO2S1 .................................................324
Component Description ........................................324
CONSULT-II Reference Value in Data Monitor Mode
.324
On Board Diagnosis Logic ....................................324
DTC Confirmation Procedure ...............................325
Overall Function Check ........................................325
Diagnostic Procedure ...........................................326
Component Inspection ..........................................328
Removal and Installation ......................................329
DTC P1146 HO2S2 .................................................330
Component Description ........................................330
CONSULT-II Reference Value in Data Monitor Mode
.330
On Board Diagnosis Logic ....................................330
DTC Confirmation Procedure ...............................331
Overall Function Check ........................................332
Wiring Diagram .....................................................333
Diagnostic Procedure ...........................................334
Component Inspection ..........................................336
Removal and Installation ......................................337
DTC P1147 HO2S2 .................................................338
Component Description ........................................338
CONSULT-II Reference Value in Data Monitor Mode
.338
On Board Diagnosis Logic ....................................338
DTC Confirmation Procedure ...............................339
Overall Function Check ........................................340
Wiring Diagram .....................................................341
Diagnostic Procedure ...........................................342
Component Inspection ..........................................344
Removal and Installation ......................................345
DTC P1211 TCS CONTROL UNIT ..........................346
Description ............................................................346On Board Diagnosis Logic ....................................346
DTC Confirmation Procedure ................................346
Diagnostic Procedure ............................................346
DTC P1212 TCS COMMUNICATION LINE .............347
Description ............................................................347
On Board Diagnosis Logic ....................................347
DTC Confirmation Procedure ................................347
Diagnostic Procedure ............................................347
DTC P1217 ENGINE OVER TEMPERATURE ........348
System Description ...............................................348
CONSULT-II Reference Value in Data Monitor Mode
.349
On Board Diagnosis Logic ....................................349
Overall Function Check .........................................349
Wiring Diagram .....................................................352
Diagnostic Procedure ............................................355
Main 12 Causes of Overheating ...........................362
Component Inspection ..........................................363
DTC P1225 TP SENSOR ........................................364
Component Description ........................................364
On Board Diagnosis Logic ....................................364
DTC Confirmation Procedure ................................364
Diagnostic Procedure ............................................365
Removal and Installation .......................................365
DTC P1226 TP SENSOR ........................................366
Component Description ........................................366
On Board Diagnosis Logic ....................................366
DTC Confirmation Procedure ................................366
Diagnostic Procedure ............................................367
Removal and Installation .......................................367
DTC P1229 SENSOR POWER SUPPLY ................368
On Board Diagnosis Logic ....................................368
DTC Confirmation Procedure ................................368
Wiring Diagram .....................................................369
Diagnostic Procedure ............................................370
DTC P1706 PNP SWITCH .......................................373
Component Description ........................................373
CONSULT-II Reference Value in Data Monitor Mode
.373
On Board Diagnosis Logic ....................................373
DTC Confirmation Procedure ................................373
Overall Function Check .........................................373
Wiring Diagram .....................................................375
Diagnostic Procedure ............................................376
DTC P1720 VSS ......................................................378
Description ............................................................378
CONSULT-II Reference Value in Data Monitor Mode
.378
On Board Diagnosis Logic ....................................378
DTC Confirmation Procedure ................................378
Diagnostic Procedure ............................................379
DTC P1805 BRAKE SWITCH .................................380
Description ............................................................380
CONSULT-II Reference Value in Data Monitor Mode
.380
On Board Diagnosis Logic ....................................380
FAIL-SAFE MODE ................................................380
DTC Confirmation Procedure ................................380
Wiring Diagram .....................................................381

EC-8 Main 12 Causes of Overheating ...........................714
Component Inspection ..........................................715
DTC P1225 TP SENSOR ........................................716
Component Description ........................................716
On Board Diagnosis Logic ....................................716
DTC Confirmation Procedure ...............................716
Diagnostic Procedure ...........................................717
Removal and Installation ......................................717
DTC P1226 TP SENSOR ........................................718
Component Description ........................................718
On Board Diagnosis Logic ....................................718
DTC Confirmation Procedure ...............................718
Diagnostic Procedure ...........................................719
Removal and Installation ......................................719
DTC P1229 SENSOR POWER SUPPLY ................720
On Board Diagnosis Logic ....................................720
DTC Confirmation Procedure ...............................720
Wiring Diagram .....................................................721
Diagnostic Procedure ...........................................722
DTC P1706 PNP SWITCH ......................................725
Component Description ........................................725
CONSULT-II Reference Value in Data Monitor Mode
.725
On Board Diagnosis Logic ....................................725
DTC Confirmation Procedure ...............................725
Overall Function Check ........................................725
Wiring Diagram .....................................................727
Diagnostic Procedure ...........................................728
DTC P1720 VSS ......................................................730
Description ............................................................730
CONSULT-II Reference Value in Data Monitor Mode
.730
On Board Diagnosis Logic ....................................730
DTC Confirmation Procedure ...............................730
Diagnostic Procedure ...........................................732
DTC P1805 BRAKE SWITCH .................................733
Description ............................................................733
CONSULT-II Reference Value in Data Monitor Mode
.733
On Board Diagnosis Logic ....................................733
DTC Confirmation Procedure ...............................733
Wiring Diagram .....................................................735
Diagnostic Procedure ...........................................736
Component Inspection ..........................................738
DTC P2122, P2123 APP SENSOR .........................740
Component Description ........................................740
CONSULT-II Reference Value in Data Monitor Mode
.740
On Board Diagnosis Logic ....................................740
DTC Confirmation Procedure ...............................741
Wiring Diagram .....................................................742
Diagnostic Procedure ...........................................744
Component Inspection ..........................................746
Removal and Installation ......................................746
DTC P2127, P2128 APP SENSOR .........................747
Component Description ........................................747
CONSULT-II Reference Value in Data Monitor Mode
.747
On Board Diagnosis Logic ....................................747DTC Confirmation Procedure ................................748
Wiring Diagram .....................................................749
Diagnostic Procedure ............................................751
Component Inspection ..........................................754
Removal and Installation .......................................754
DTC P2135 TP SENSOR ........................................755
Component Description ........................................755
CONSULT-II Reference Value in Data Monitor Mode
.755
On Board Diagnosis Logic ....................................755
DTC Confirmation Procedure ................................755
Wiring Diagram .....................................................757
Diagnostic Procedure ............................................759
Component Inspection ..........................................762
Removal and Installation .......................................762
DTC P2138 APP SENSOR ......................................763
Component Description ........................................763
CONSULT-II Reference Value in Data Monitor Mode
.763
On Board Diagnosis Logic ....................................763
DTC Confirmation Procedure ................................764
Wiring Diagram .....................................................765
Diagnostic Procedure ............................................767
Component Inspection ..........................................770
Removal and Installation .......................................770
HO2S1 HEATER ......................................................771
Description ............................................................771
CONSULT-II Reference Value in Data Monitor Mode
.771
Wiring Diagram .....................................................772
Diagnostic Procedure ............................................773
Component Inspection ..........................................775
Removal and Installation .......................................775
HO2S2 HEATER ......................................................776
Description ............................................................776
CONSULT-II Reference Value in Data Monitor Mode
.776
Wiring Diagram .....................................................777
Diagnostic Procedure ............................................778
Component Inspection ..........................................780
Removal and Installation .......................................780
IAT SENSOR ...........................................................781
Component Description ........................................781
Wiring Diagram .....................................................782
Diagnostic Procedure ............................................783
Component Inspection ..........................................785
Removal and Installation .......................................785
HO2S1 .....................................................................786
Component Description ........................................786
CONSULT-II Reference Value in Data Monitor Mode
.786
Wiring Diagram .....................................................787
Diagnostic Procedure ............................................788
Component Inspection ..........................................790
Removal and Installation .......................................791
HO2S2 .....................................................................792
Component Description ........................................792
CONSULT-II Reference Value in Data Monitor Mode
.792

EC-11
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ECA
Wiring Diagram .................................................... 994
Diagnostic Procedure ........................................... 995
Removal and Installation ...................................... 996
DTC P0192, P0193 FRP SENSOR ......................... 997
Description ........................................................... 997
CONSULT-II Reference Value in Data Monitor Mode
. 997
ECM Terminals and Reference Value .................. 997
On Board Diagnosis Logic ................................... 997
DTC Confirmation Procedure ............................... 998
Wiring Diagram .................................................... 999
Diagnostic Procedure ..........................................1000
Component Inspection ........................................1002
Removal and Installation .....................................1002
DTC P0200 FUEL INJECTOR ...............................1003
On Board Diagnosis Logic ..................................1003
DTC Confirmation Procedure ..............................1003
Diagnostic Procedure ..........................................1003
DTC P0201 - P0204 FUEL INJECTOR .................1005
Component Description .......................................1005
CONSULT-II Reference Value in Data Monitor Mode
1005
ECM Terminals and Reference Value .................1005
On Board Diagnosis Logic ..................................1006
DTC Confirmation Procedure ..............................1007
Wiring Diagram ...................................................1008
Diagnostic Procedure ..........................................1009
Component Inspection ........................................1010
Removal and Installation .....................................1010
DTC P0217 ENGINE OVER TEMPERATURE ......1011
System Description .............................................1011
CONSULT-II Reference Value in Data Monitor Mode
1011
ECM Terminals and Reference Value .................1011
On Board Diagnosis Logic ..................................1012
Overall Function Check .......................................1012
Wiring Diagram ...................................................1014
Diagnostic Procedure ..........................................1015
Main 12 Causes of Overheating ..........................1023
Component Inspection ........................................1024
DTC P0222, P0223 APP SENSOR .......................1025
Description ..........................................................1025
CONSULT-II Reference Value in Data Monitor Mode
1025
ECM Terminals and Reference Value .................1025
On Board Diagnosis Logic ..................................1026
DTC Confirmation Procedure ..............................1026
Wiring Diagram ...................................................1027
Diagnostic Procedure ..........................................1028
Component Inspection ........................................1030
Removal and Installation .....................................1030
DTC P0234 TC SYSTEM .......................................1031
Description ..........................................................1031
ECM Terminal and Reference Value ...................1031
On Board Diagnosis Logic ..................................1032
Overall Function Check .......................................1032
Wiring Diagram ...................................................1033
Diagnostic Procedure ..........................................1034
Component Inspection ........................................1037DTC P0237, P0238 TC BOOST SENSOR .............1038
Component Description .......................................1038
CONSULT-II Reference Value in Data Monitor Mode
1038
ECM Terminals and Reference Value ..................1038
On Board Diagnosis Logic ...................................1039
DTC Confirmation Procedure ..............................1039
Wiring Diagram ....................................................1040
Diagnostic Procedure ..........................................1041
Component Inspection .........................................1043
Removal and Installation .....................................1043
DTC P0335 CKP SENSOR ....................................1044
Description ...........................................................1044
CONSULT-II Reference Value in Data Monitor Mode
1044
ECM Terminals and Reference Value ..................1044
On Board Diagnosis Logic ...................................1045
DTC Confirmation Procedure ..............................1045
Wiring Diagram ....................................................1046
Diagnostic Procedure ..........................................1047
Component Inspection .........................................1049
Removal and Installation .....................................1049
DTC P0336 CKP SENSOR ....................................1050
Description ...........................................................1050
CONSULT-II Reference Value in Data Monitor Mode
1050
ECM Terminals and Reference Value ..................1050
On Board Diagnosis Logic ...................................1051
DTC Confirmation Procedure ..............................1051
Wiring Diagram ....................................................1052
Diagnostic Procedure ..........................................1053
Component Inspection .........................................1055
Removal and Installation .....................................1055
DTC P0340 CMP SENSOR ....................................1056
Description ...........................................................1056
ECM Terminals and Reference Value ..................1056
On Board Diagnosis Logic ...................................1056
DTC Confirmation Procedure ..............................1057
Wiring Diagram ....................................................1058
Diagnostic Procedure ..........................................1059
Component Inspection .........................................1061
Removal and Installation .....................................1061
DTC P0341 CMP SENSOR ....................................1062
Description ...........................................................1062
ECM Terminals and Reference Value ..................1062
On Board Diagnosis Logic ...................................1062
DTC Confirmation Procedure ..............................1063
Wiring Diagram ....................................................1064
Diagnostic Procedure ..........................................1065
Component Inspection .........................................1068
Removal and Installation .....................................1068
DTC P0380 GLOW RELAY ....................................1069
On Board Diagnosis Logic ...................................1069
DTC Confirmation Procedure ..............................1069
Wiring Diagram ....................................................1070
Diagnostic Procedure ..........................................1071
Component Inspection .........................................1072
DTC P0401 EGR FUNCTION ................................1073
Description ...........................................................1073