2006 INFINITI FX35 overheating

CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION CO
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Revision: 2006 December 2006 FX35/FX45
ENGINE COOLING SYSTEM
VQ35DE
PRECAUTIONS ..................................................... ..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
Precautions for Liquid Gasket ............................. ..... 3
REMOVAL OF LIQUID GASKET SEALING ..... ..... 3
LIQUID GASKET APPLICATION PROCEDURE ..... 3
PREPARATION ...................................................... ..... 5
Special Service Tools .......................................... ..... 5
Commercial Service Tools ................................... ..... 6
OVERHEATING CAUSE ANALYSIS ..................... ..... 7
Troubleshooting Chart ......................................... ..... 7
COOLING SYSTEM ............................................... ..... 9
Cooling Circuit ..................................................... ..... 9
System Chart ...................................................... ... 10
ENGINE COOLANT ............................................... ....11
Inspection ............................................................ .... 11
LEVEL CHECK ................................................ .... 11
LEAK CHECK .................................................. .... 11
Changing Engine Coolant ................................... .... 11
DRAINING ENGINE COOLANT ...................... .... 11
REFILLING ENGINE COOLANT ..................... ... 12
FLUSHING COOLING SYSTEM ...................... ... 13
RADIATOR ............................................................. ... 14
Components ........................................................ ... 14
Removal and Installation ..................................... ... 14
REMOVAL ........................................................ ... 14
INSTALLATION ................................................ ... 15
INSPECTION AFTER INSTALLATION ............ ... 15
Checking Radiator Cap ....................................... ... 15
Checking Radiator ............................................... ... 16
RADIATOR (ALUMINUM TYPE) ........................... ... 17
Components ........................................................ ... 17
Disassembly and Assembly ................................ ... 17
PREPARATION ................................................ ... 17
DISASSEMBLY ................................................ ... 17
ASSEMBLY ...................................................... ... 18
INSPECTION ................................................... ... 20 COOLING FAN .......................................................
... 21
Components ........................................................ ... 21
Removal and Installation ..................................... ... 21
REMOVAL ........................................................ ... 21
INSTALLATION ................................................ ... 21
INSPECTION AFTER INSTALLATION ............. ... 21
Disassembly and Assembly ................................. ... 21
DISASSEMBLY ................................................ ... 21
INSPECTION AFTER DISASSEMBLY ............. ... 21
ASSEMBLY ...................................................... ... 21
WATER PUMP ....................................................... ... 22
Components ........................................................ ... 22
Removal and Installation ..................................... ... 22
REMOVAL ........................................................ ... 22
INSPECTION AFTER REMOVAL .................... ... 24
INSTALLATION ................................................ ... 24
INSPECTION AFTER INSTALLATION ............. ... 26
WATER INLET AND THERMOSTAT ASSEMBLY . ... 27
Components ........................................................ ... 27
Removal and Installation ..................................... ... 27
REMOVAL ........................................................ ... 27
INSPECTION AFTER REMOVAL .................... ... 28
INSTALLATION ................................................ ... 28
INSPECTION AFTER INSTALLATION ............. ... 28
WATER OUTLET AND WATER PIPING ................ ... 29
Components ........................................................ ... 29
Removal and Installation ..................................... ... 29
REMOVAL ........................................................ ... 29
INSTALLATION ................................................ ... 30
INSPECTION AFTER INSTALLATION ............. ... 30
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 31
Standard and Limit ............................................... ... 31
ENGINE COOLANT CAPACITY (APPROXI-
MATE) ............................................................... ... 31
RADIATOR ....................................................... ... 31
THERMOSTAT ................................................. ... 31

CO-2Revision: 2006 December 2006 FX35/FX45
VK45DE
PRECAUTIONS ...................................................... ... 32
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .............................................................. ... 32
PREPARATION ...................................................... ... 33
Special Service Tools .......................................... ... 33
Commercial Service Tools ................................... ... 33
OVERHEATING CAUSE ANALYSIS ..................... ... 34
Troubleshooting Chart ......................................... ... 34
COOLING SYSTEM ............................................... ... 36
Cooling Circuit ..................................................... ... 36
System Chart ....................................................... ... 37
ENGINE COOLANT ............................................... ... 38
Inspection ............................................................ ... 38
LEVEL CHECK ................................................. ... 38
LEAK CHECK ................................................... ... 38
Changing Engine Coolant .................................... ... 38
DRAINING ENGINE COOLANT ....................... ... 38
REFILLING ENGINE COOLANT ...................... ... 39
FLUSHING COOLING SYSTEM ...................... ... 40
RADIATOR ............................................................. ... 41
Components ........................................................ ... 41
Removal and Installation ..................................... ... 41
REMOVAL ........................................................ ... 41
INSTALLATION ................................................. ... 43
INSPECTION AFTER INSTALLATION ............. ... 43
Checking Radiator Cap ....................................... ... 43
Checking Radiator ............................................... ... 44
RADIATOR (ALUMINUM TYPE) ............................ ... 45
Components ........................................................ ... 45
Disassembly and Assembly ................................. ... 45
PREPARATION ................................................ ... 45
DISASSEMBLY ................................................ ... 45
ASSEMBLY ...................................................... ... 46
INSPECTION .................................................... ... 48 COOLING FAN .......................................................
... 49
Components (Crankshaft Driven type) ................. ... 49
Removal and Installation ...................................... ... 49
REMOVAL ......................................................... ... 49
INSPECTION AFTER REMOVAL ..................... ... 49
INSTALLATION ................................................. ... 49
Components (Motor Driven Type) ........................ ... 50
Removal and Installation ...................................... ... 50
REMOVAL ......................................................... ... 50
INSTALLATION ................................................. ... 50
Disassembly and Assembly (Motor Driven Type) ... 50 DISASSEMBLY ................................................. ... 50
INSPECTION AFTER DISASSEMBLY ............. ... 50
ASSEMBLY ....................................................... ... 50
WATER PUMP ........................................................ ... 51
Components ......................................................... ... 51
Removal and Installation ...................................... ... 51
REMOVAL ......................................................... ... 51
INSPECTION AFTER REMOVAL ..................... ... 52
INSTALLATION ................................................. ... 52
INSPECTION AFTER INSTALLATION ............. ... 52
THERMOSTAT AND WATER CONTROL VALVE .. ... 53
Components ......................................................... ... 53
Removal and Installation ...................................... ... 54
REMOVAL ......................................................... ... 54
INSPECTION AFTER REMOVAL ..................... ... 54
INSTALLATION ................................................. ... 54
INSPECTION AFTER INSTALLATION ............. ... 55
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 56
Standard and Limit ............................................... ... 56
ENGINE COOLANT CAPACITY (APPROXI-
MATE) ............................................................... ... 56
RADIATOR ........................................................ ... 56
THERMOSTAT .................................................. ... 56
WATER CONTROL VALVE ............................... ... 56

OVERHEATING CAUSE ANALYSIS CO-7
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartNBS003JR
Symptom Check items
Cooling sys-
tem parts
malfunction Poor heat transfer
Water pump malfunction Worn or loose drive belt
—
Thermostat stuck closed —
Damaged fins Dust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tube Excess foreign material
(rust, dirt, sand, etc.)
Reduced air flow Cooling 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 coolant Engine coolant leaks Cooling hose
Loose clamp
Cracked hose
Water pump Poor sealing
Radiator cap Loose
Poor sealing
Radiator O-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tank Exhaust gas leaks into
cooling system Cylinder head deterioration
Cylinder head gasket dete-
rioration

CO-8
[VQ35DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2006 December 2006 FX35/FX45
Except cool-
ing system
parts mal-
function — Overload on engine
Abusive driving
High 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
flow Blocked bumper —
—
Blocked radiator grille
Installed car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser Blocked air flow
Installed large fog lamp
Symptom Check items

CO-34
[VK45DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2006 December 2006 FX35/FX45
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartNBS003KF
Symptom Check items
Cooling sys-
tem parts
malfunction Poor heat transfer
Water pump malfunction Worn or loose drive belt
—
Thermostat and water con-
trol valve stuck closed —
Damaged fins Dust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tube Excess foreign material
(rust, dirt, sand, etc.)
Reduced air flow Cooling 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 coolant Engine coolant leaks Cooling hose
Loose clamp
Cracked hose
Water pump Poor sealing
Radiator cap Loose
Poor sealing
Radiator O-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tank Exhaust gas leaks into
cooling system Cylinder head deterioration
Cylinder head gasket dete-
rioration

OVERHEATING CAUSE ANALYSIS CO-35
[VK45DE]
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CO
Revision: 2006 December 2006 FX35/FX45
Except cool-
ing system
parts mal-
function — Overload on engine
Abusive driving
High 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
flow Blocked bumper —
—
Blocked radiator grille
Installed car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser Blocked air flow
Installed large fog lamp
Symptom Check items

EC-5
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EC A
Revision: 2006 December 2006 FX35/FX45 DTC Confirmation Procedure ..............................
. 435
Wiring Diagram ................................................... . 436
Diagnostic Procedure .......................................... . 437
Component Inspection ........................................ . 441
DTC P0455 EVAP CONTROL SYSTEM ............... . 442
On Board Diagnosis Logic .................................. . 442
DTC Confirmation Procedure .............................. . 443
Diagnostic Procedure .......................................... . 444
DTC P0456 EVAP CONTROL SYSTEM ............... . 450
On Board Diagnosis Logic .................................. . 450
DTC Confirmation Procedure .............................. . 451
Overall Function Check ....................................... . 452
Diagnostic Procedure .......................................... . 453
DTC P0460 FUEL LEVEL SENSOR ..................... . 460
Component Description ....................................... . 460
On Board Diagnosis Logic .................................. . 460
DTC Confirmation Procedure .............................. . 460
Diagnostic Procedure .......................................... . 461
Removal and Installation ..................................... . 461
DTC P0461 FUEL LEVEL SENSOR ..................... . 462
Component Description ....................................... . 462
On Board Diagnosis Logic .................................. . 462
Overall Function Check ....................................... . 462
Diagnostic Procedure .......................................... . 463
Removal and Installation ..................................... . 463
DTC P0462, P0463 FUEL LEVEL SENSOR ......... . 464
Component Description ....................................... . 464
On Board Diagnosis Logic .................................. . 464
DTC Confirmation Procedure .............................. . 464
Diagnostic Procedure .......................................... . 465
Removal and Installation ..................................... . 465
DTC P0500 VSS .................................................... . 466
Description .......................................................... . 466
On Board Diagnosis Logic .................................. . 466
DTC Confirmation Procedure .............................. . 466
Overall Function Check ....................................... . 466
Diagnostic Procedure .......................................... . 467
DTC P0506 ISC SYSTEM ...................................... . 468
Description .......................................................... . 468
On Board Diagnosis Logic .................................. . 468
DTC Confirmation Procedure .............................. . 468
Diagnostic Procedure .......................................... . 469
DTC P0507 ISC SYSTEM ...................................... . 470
Description .......................................................... . 470
On Board Diagnosis Logic .................................. . 470
DTC Confirmation Procedure .............................. . 470
Diagnostic Procedure .......................................... . 471
DTC P0550 PSP SENSOR .................................... . 472
Component Description ....................................... . 472
CONSULT-II Reference Value in Data Monitor Mode . 472
On Board Diagnosis Logic .................................. . 472
DTC Confirmation Procedure .............................. . 472
Wiring Diagram ................................................... . 473
Diagnostic Procedure .......................................... . 474
Component Inspection ........................................ . 476
Removal and Installation ..................................... . 476
DTC P0603 ECM POWER SUPPLY ...................... . 477
Component Description ....................................... . 477 On Board Diagnosis Logic ...................................
.477
DTC Confirmation Procedure .............................. .477
Wiring Diagram .................................................... .478
Diagnostic Procedure .......................................... .479
DTC P0605 ECM .................................................... .481
Component Description ....................................... .481
On Board Diagnosis Logic ................................... .481
DTC Confirmation Procedure .............................. .481
Diagnostic Procedure .......................................... .482
DTC P0643 SENSOR POWER SUPPLY ............... .484
On Board Diagnosis Logic ................................... .484
DTC Confirmation Procedure .............................. .484
Wiring Diagram .................................................... .485
Diagnostic Procedure .......................................... .487
DTC P0850 PNP SWITCH ..................................... .489
Component Description ....................................... .489
CONSULT-II Reference Value in Data Monitor Mode .489
On Board Diagnosis Logic ................................... .489
DTC Confirmation Procedure .............................. .489
Overall Function Check ....................................... .490
Wiring Diagram .................................................... .491
Diagnostic Procedure .......................................... .492
DTC P1148, P1168 CLOSED LOOP CONTROL ... .494
On Board Diagnosis Logic ................................... .494
DTC P1211 TCS CONTROL UNIT ......................... .495
Description ........................................................... .495
On Board Diagnosis Logic ................................... .495
DTC Confirmation Procedure .............................. .495
Diagnostic Procedure .......................................... .495
DTC P1212 TCS COMMUNICATION LINE ........... .496
Description ........................................................... .496
On Board Diagnosis Logic ................................... .496
DTC Confirmation Procedure .............................. .496
Diagnostic Procedure .......................................... .496
DTC P1217 ENGINE OVER TEMPERATURE ....... .497
Description ........................................................... .497
CONSULT-II Reference Value in Data Monitor Mode .498
On Board Diagnosis Logic ................................... .498
Overall Function Check ....................................... .499
Wiring Diagram .................................................... .501
Diagnostic Procedure .......................................... .503
Main 12 Causes of Overheating .......................... .508
Component Inspection ......................................... .508
DTC P1225 TP SENSOR ....................................... .510
Component Description ....................................... .510
On Board Diagnosis Logic ................................... .510
DTC Confirmation Procedure .............................. .510
Diagnostic Procedure .......................................... .511
Removal and Installation ..................................... .511
DTC P1226 TP SENSOR ....................................... .512
Component Description ....................................... .512
On Board Diagnosis Logic ................................... .512
DTC Confirmation Procedure .............................. .512
Diagnostic Procedure .......................................... .513
Removal and Installation ..................................... .513
DTC P1564 ICC STEERING SWITCH ................... .514
Component Description ....................................... .514

EC-12Revision: 2006 December 2006 FX35/FX45 On Board Diagnosis Logic ...................................
11 3 7
DTC Confirmation Procedure .............................. 11 3 7
Wiring Diagram .................................................... 11 3 8
Diagnostic Procedure .......................................... 11 3 9
Component Inspection ......................................... 11 4 1
Removal and Installation ..................................... 11 4 1
DTC P0603 ECM POWER SUPPLY ...................... 114 2
Component Description ....................................... 11 4 2
On Board Diagnosis Logic ................................... 11 4 2
DTC Confirmation Procedure .............................. 11 4 2
Wiring Diagram .................................................... 11 4 3
Diagnostic Procedure .......................................... 11 4 4
DTC P0605 ECM .................................................... 114 6
Component Description ....................................... 11 4 6
On Board Diagnosis Logic ................................... 11 4 6
DTC Confirmation Procedure .............................. 11 4 6
Diagnostic Procedure .......................................... 11 4 7
DTC P0643 SENSOR POWER SUPPLY ............... 114 9
On Board Diagnosis Logic ................................... 11 4 9
DTC Confirmation Procedure .............................. 11 4 9
Wiring Diagram .................................................... 11 5 0
Diagnostic Procedure .......................................... 11 5 2
DTC P0850 PNP SWITCH ..................................... 115 4
Component Description ....................................... 11 5 4
CONSULT-II Reference Value in Data Monitor Mode 11 5 4
On Board Diagnosis Logic ................................... 11 5 4
DTC Confirmation Procedure .............................. 11 5 4
Overall Function Check ....................................... 11 5 5
Wiring Diagram .................................................... 11 5 6
Diagnostic Procedure .......................................... 11 5 7
DTC P1140, P1145 IVT CONTROL POSITION SEN-
SOR ........................................................................ 115 9
Component Description ....................................... 11 5 9
CONSULT-II Reference Value in Data Monitor Mode 11 5 9
On Board Diagnosis Logic ................................... 11 5 9
DTC Confirmation Procedure .............................. 11 5 9
Wiring Diagram .................................................... 11 6 1
Diagnostic Procedure .......................................... 11 6 4
Component Inspection ......................................... 11 6 7
Removal and Installation ..................................... 11 6 7
DTC P1148, P1168 CLOSED LOOP CONTROL ... 116 8
On Board Diagnosis Logic ................................... 11 6 8
DTC P1211 TCS CONTROL UNIT ......................... 116 9
Description ........................................................... 11 6 9
On Board Diagnosis Logic ................................... 11 6 9
DTC Confirmation Procedure .............................. 11 6 9
Diagnostic Procedure .......................................... 11 6 9
DTC P1212 TCS COMMUNICATION LINE ........... 117 0
Description ........................................................... 11 7 0
On Board Diagnosis Logic ................................... 11 7 0
DTC Confirmation Procedure .............................. 11 7 0
Diagnostic Procedure .......................................... 11 7 0
DTC P1217 ENGINE OVER TEMPERATURE ....... 117 1
Description ........................................................... 11 7 1
CONSULT-II Reference Value in Data Monitor Mode 11 7 2
On Board Diagnosis Logic ................................... 11 7 2 Overall Function Check ........................................
11 7 3
Wiring Diagram .................................................... 11 7 5
Diagnostic Procedure ........................................... 11 7 7
Main 13 Causes of Overheating .......................... 11 8 1
Component Inspection ......................................... 11 8 2
DTC P1225 TP SENSOR ....................................... 11 83
Component Description ....................................... 11 8 3
On Board Diagnosis Logic ................................... 11 8 3
DTC Confirmation Procedure ............................... 11 8 3
Diagnostic Procedure ........................................... 11 8 4
Removal and Installation ...................................... 11 8 4
DTC P1226 TP SENSOR ....................................... 11 85
Component Description ....................................... 11 8 5
On Board Diagnosis Logic ................................... 11 8 5
DTC Confirmation Procedure ............................... 11 8 5
Diagnostic Procedure ........................................... 11 8 6
Removal and Installation ...................................... 11 8 6
DTC P1564 ICC STEERING SWITCH ................... 11 87
Component Description ....................................... 11 8 7
CONSULT-II Reference Value in Data Monitor Mode 11 8 7
On Board Diagnosis Logic ................................... 11 8 7
DTC Confirmation Procedure ............................... 11 8 8
Wiring Diagram .................................................... 11 8 9
Diagnostic Procedure ........................................... 11 9 0
Component Inspection ......................................... 11 9 3
DTC P1564 ASCD STEERING SWITCH ............... 11 94
Component Description ....................................... 11 9 4
CONSULT-II Reference Value in Data Monitor Mode 11 9 4
On Board Diagnosis Logic ................................... 11 9 4
DTC Confirmation Procedure ............................... 11 9 5
Wiring Diagram .................................................... 11 9 6
Diagnostic Procedure ........................................... 11 9 7
Component Inspection ......................................... 1200
DTC P1568 ICC FUNCTION .................................. 1201
On Board Diagnosis Logic ................................... 1201
DTC Confirmation Procedure ............................... 1201
Diagnostic Procedure ........................................... 1201
DTC P1572 ICC BRAKE SWITCH ......................... 1202
Component Description ....................................... 1202
CONSULT-II Reference Value in Data Monitor Mode 1202
On Board Diagnosis Logic ................................... 1202
DTC Confirmation Procedure ............................... 1203
Wiring Diagram .................................................... 1204
Diagnostic Procedure ........................................... 1205
Component Inspection ......................................... 1210
DTC P1572 ASCD BRAKE SWITCH ..................... 1211
Component Description ....................................... 1211
CONSULT-II Reference Value in Data Monitor Mode 1211
On Board Diagnosis Logic ................................... 1211
DTC Confirmation Procedure ............................... 1212
Wiring Diagram .................................................... 1213
Diagnostic Procedure ........................................... 1214
Component Inspection ......................................... 1218
DTC P1574 ICC VEHICLE SPEED SENSOR ........ 1219
Component Description ....................................... 1219