2006 INFINITI M35 heater

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ENGINE COOLANT
Revision: 2006 January2006 M35/M45
If necessary, refill engine coolant up to filler neck of thermostat housing.
8. Refill reservoir tank to “MAX” level line with engine coolant.
9. Repeat steps 4 through 7 two or more times with radiator cap installed until engine coolant level no longer
drops.
10. Check cooling system for leaks with engine running.
11. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000
rpm with heater temperature controller set at several position between “COOL” and “WARM”.
Sound may be noticeable at heater unit.
12. Repeat step 11 three times.
13. If sound is heard, bleed air from cooling system by repeating steps 4 through 7 until engine coolant level
no longer drops.
FLUSHING COOLING SYSTEM
1. Install reservoir tank, and radiator drain plug.
CAUTION:
Be sure to clean drain plug and install with new O-ring.
If water drain plugs on cylinder block are removed, close and tighten them. Refer to EM-254,
"ASSEMBLY" .
2. Remove air relief plug (1) on heater hose.
3. Fill thermostat housing with water until water spills from the air relief hole, then close air relief plug. Fill
thermostat housing and reservoir tank with water and reinstall radiator cap.
4. Run engine and warm it up to normal operating temperature.
5. Rev engine two or three times under no-load.
6. Stop engine and wait until it cools down.
7. Drain water from the system. Refer to CO-40, "
DRAINING ENGINE COOLANT" .
8. Repeat steps 1 through 7 until clear water begins to drain from radiator. Radiator drain plug:
: 1.2 Nꞏm (0.12 kg-m, 11 in-lb)
: Engine front
PBIC3394E
Air relief plug:
: 1.2 Nꞏm (0.12 kg-m, 11 in-lb)

THERMOSTAT AND WATER CONTROL VALVE
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THERMOSTAT AND WATER CONTROL VALVEPFP:21200
ComponentsNBS004RR
Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS004RS
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-173, "ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-179, "
INTAKE MANIFOLD" .
3. Remove air duct (inlet). Refer to EM-177, "
AIR CLEANER AND AIR DUCT" .
4. Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to CO-40, "
Chang-
ing Engine Coolant" and EM-250, "DISASSEMBLY" .
CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.
1. Water connector 2. O-ring 3. Rubber ring
4. Heater hose 5. Water control valve 6. Water outlet
7. Gasket 8. O-ring 9. Water outlet pipe
10. Thermostat housing 11. Radiator cap 12. Radiator hose (upper)
13. Thermostat 14. Rubber ring 15. Water inlet
16. Water suction hose 17. Water suction pipe 18. Radiator hose (lower)
19. Gasket 20. O-ring 21. Heater pipe
22. Heater hose
A. To radiator B. To intake manifold adapter C. To cylinder block
D. To cylinder head (right bank) E. To cylinder head (left bank) F.To heater core
PBIC3306E

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THERMOSTAT AND WATER CONTROL VALVE
Revision: 2006 January2006 M35/M45
5. Disconnect water suction hose from water inlet.
6. Remove water inlet and thermostat.
CAUTION:
Do not disassemble thermostat.
7. Remove intake manifolds (upper and lower). Refer to EM-179, "
INTAKE MANIFOLD" .
8. Disconnect radiator hose (upper) from thermostat housing.
9. Disconnect heater hoses from water outlet and heater pipe.
10. Remove thermostat housing, water outlet pipe, water connector, water control valve, water outlet and
heater pipe.
CAUTION:
Do not disassemble water control valve.
INSPECTION AFTER REMOVAL
Make sure that valves both in thermostat and water control valve are completely closing at normal tempar-
ature.
Place a thread so that it is caught in the valves of the thermostat
and water control valve. Immerse fully in a container filled with
water. Heat while stirring. (The example in the figure shows ther-
mostat.)
The valve opening temperature is the temperature at which the
valve opens and falls from the thread.
Continue heating. Check the maximum valve lift.
NOTE:
The maximum valve lift standard temperature for water control
valve is the reference value.
After checking the maximum valve lift, lower the water tempera-
ture and check the valve closing temperature.
Standard values:
If the malfunctioning condition, when closing valve at normal temperature, or measured values are out of
the standard, replace thermostat and/or water control valve.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.
Thermostat and Water Control Valve
Install thermostat and water control valve with the whole circum-
ference of each flange part fit securely inside rubber ring. (The
example in the figure shows thermostat.)
SLC252B
Thermostat Water control valve
Valve opening temperature 80 - 84
C (176 - 183F) 93.5 - 96.5C (200 - 206F)
Maximum valve liftMore than 10 mm/ 95
C
(0.39 in/ 203
F)More than 8 mm/ 108
C
(0.315 in/ 226
F)
Valve closing temperature 77
C (171F) 90C (194F)
PBIC0157E

THERMOSTAT AND WATER CONTROL VALVE
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Install thermostat with jiggle valve facing upwards. (The position
deviation may be within the range of
10 degrees)
Install water control valve with the up-mark facing up and the
frame center part facing upwards. (The position deviation may
be within the range of
10 degrees)
Water Outlet Pipe and Heater Pipe
First apply a neutral detergent to O-rings, then quickly insert the insertion parts of the water outlet pipe and
heater pipe into the installation holes.
INSPECTION AFTER INSTALLATION
Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301 (J33984-A)] and
radiator cap tester (commercial service tool). Refer to CO-40, "
LEAK CHECK" .
Start and warm up engine. Visually check if there is no leaks of engine coolant.
PBIC0158E

EC-2Revision: 2006 January2006 M35/M45 Inspection Procedure ...........................................
.155
Diagnostic Procedure ...........................................156
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................165
Description ............................................................165
Diagnostic Procedure ...........................................165
POWER SUPPLY AND GROUND CIRCUIT ...........166
Wiring Diagram .....................................................166
Diagnostic Procedure ...........................................167
Ground Inspection ................................................172
DTC U1000, U1001 CAN COMMUNICATION LINE .173
Description ............................................................173
On Board Diagnosis Logic ....................................173
DTC Confirmation Procedure ...............................173
Wiring Diagram .....................................................174
Diagnostic Procedure ...........................................175
DTC U1010 CAN COMMUNICATION .....................176
Description ............................................................176
On Board Diagnosis Logic ....................................176
DTC Confirmation Procedure ...............................176
Diagnostic Procedure ...........................................177
DTC P0011, P0021 IVT CONTROL ........................178
Description ............................................................178
CONSULT-II Reference Value in Data Monitor Mode
.178
On Board Diagnosis Logic ....................................179
DTC Confirmation Procedure ...............................179
Diagnostic Procedure ...........................................180
Component Inspection ..........................................181
Removal and Installation ......................................181
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER ..................................................................182
Description ............................................................182
CONSULT-II Reference Value in Data Monitor Mode
.182
On Board Diagnosis Logic ....................................182
DTC Confirmation Procedure ...............................182
Wiring Diagram .....................................................183
Diagnostic Procedure ...........................................186
Component Inspection ..........................................188
Removal and Installation ......................................188
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .189
Description ............................................................189
CONSULT-II Reference Value in Data Monitor Mode
.189
On Board Diagnosis Logic ....................................189
DTC Confirmation Procedure ...............................190
Wiring Diagram ....................................................
.191
Diagnostic Procedure ...........................................194
Component Inspection ..........................................196
Removal and Installation ......................................196
DTC P0075, P0081 IVT CONTROL SOLENOID
VALVE .....................................................................197
Component Description ........................................197
CONSULT-II Reference Value in Data Monitor Mode
.197
On Board Diagnosis Logic ....................................197
DTC Confirmation Procedure ...............................197
Wiring Diagram .....................................................198Diagnostic Procedure ............................................202
Component Inspection ..........................................204
Removal and Installation .......................................204
DTC P0101 MAF SENSOR .....................................205
Component Description ........................................205
CONSULT-II Reference Value in Data Monitor Mode
.205
On Board Diagnosis Logic ....................................205
DTC Confirmation Procedure ................................206
Overall Function Check .........................................207
Wiring Diagram .....................................................208
Diagnostic Procedure ............................................209
Component Inspection ..........................................212
Removal and Installation .......................................213
DTC P0102, P0103 MAF SENSOR .........................214
Component Description ........................................214
CONSULT-II Reference Value in Data Monitor Mode
.214
On Board Diagnosis Logic ....................................214
DTC Confirmation Procedure ................................215
Wiring Diagram .....................................................216
Diagnostic Procedure ............................................217
Component Inspection ..........................................219
Removal and Installation .......................................220
DTC P0112, P0113 IAT SENSOR ............................221
Component Description ........................................221
On Board Diagnosis Logic ....................................221
DTC Confirmation Procedure ................................221
Wiring Diagram .....................................................223
Diagnostic Procedure ............................................224
Component Inspection ..........................................225
Removal and Installation .......................................225
DTC P0117, P0118 ECT SENSOR ..........................226
Component Description ........................................226
On Board Diagnosis Logic ....................................226
DTC Confirmation Procedure ................................227
Wiring Diagram .....................................................228
Diagnostic Procedure ...........................................
.229
Component Inspection ..........................................230
Removal and Installation .......................................230
DTC P0122, P0123 TP SENSOR ............................231
Component Description ........................................231
CONSULT-II Reference Value in Data Monitor Mode
.231
On Board Diagnosis Logic ....................................231
DTC Confirmation Procedure ................................232
Wiring Diagram .....................................................233
Diagnostic Procedure ............................................234
Component Inspection ..........................................237
Removal and Installation .......................................237
DTC P0125 ECT SENSOR ......................................238
Component Description ........................................238
On Board Diagnosis Logic ....................................238
DTC Confirmation Procedure ................................239
Diagnostic Procedure ............................................239
Component Inspection ..........................................240
Removal and Installation .......................................240
DTC P0127 IAT SENSOR ........................................241
Component Description ........................................241

EC-8Revision: 2006 January2006 M35/M45 Wiring Diagram .....................................................708
Diagnostic Procedure ...........................................709
Component Inspection ..........................................713
ASCD INDICATOR .................................................
.714
Component Description ........................................714
CONSULT-II Reference Value in Data Monitor Mode
.714
Wiring Diagram .....................................................715
Diagnostic Procedure ...........................................716
SNOW MODE SWITCH ...........................................717
Description ............................................................717
CONSULT-II Reference Value in the Data Monitor
Mode .....................................................................717
Wiring Diagram .....................................................718
Diagnostic Procedure ...........................................719
Component Inspection ..........................................721
MIL AND DATA LINK CONNECTOR ......................722
Wiring Diagram .....................................................722
SERVICE DATA AND SPECIFICATIONS (SDS) ....724
Fuel Pressure .......................................................724
Idle Speed and Ignition Timing .............................724
Calculated Load Value ..........................................724
Mass Air Flow Sensor ...........................................724
Intake Air Temperature Sensor .............................724
Engine Coolant Temperature Sensor ...................724
Fuel Tank Temperature Sensor ............................724
Crankshaft Position Sensor (POS) .......................724
Camshaft Position Sensor (PHASE) ....................724
A/F Sensor 1 Heater ............................................ .724
Heated Oxygen Sensor 2 Heater .........................725
Throttle Control Motor ...........................................725
Fuel Injector ..........................................................725
Fuel Pump ............................................................725
VK45DE
INDEX FOR DTC .....................................................726
DTC No. Index ......................................................726
Alphabetical Index ................................................730
PRECAUTIONS .......................................................734
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................734
Precautions for Procedures without Cowl Top Cover .734
On Board Diagnostic (OBD) System of Engine and
A/T ........................................................................734
Precaution ............................................................735
PREPARATION .......................................................738
Special Service Tools ...........................................738
Commercial Service Tools ....................................739
ENGINE CONTROL SYSTEM ................................740
System Diagram ...................................................740
Multiport Fuel Injection (MFI) System ...................741
Electronic Ignition (EI) System .............................743
Fuel Cut Control (At No Load and High Engine
Speed) ..................................................................744
AIR CONDITIONING CUT CONTROL ....................745
Input/Output Signal Chart .....................................745
System Description ...............................................745AUTOMATIC SPEED CONTROL DEVICE (ASCD) .746
System Description ...............................................746
Component Description ........................................747
CAN COMMUNICATION .........................................748
System Description ...............................................748
EVAPORATIVE EMISSION SYSTEM .....................749
Description ............................................................749
Component Inspection ..........................................752
Removal and Installation .......................................753
How to Detect Fuel Vapor Leakage ......................753
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ....................................................................756
System Description ...............................................756
Diagnostic Procedure ............................................757
Component Inspection ..........................................759
POSITIVE CRANKCASE VENTILATION ................761
Description ............................................................761
Component Inspection ..........................................761
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ......................................................................763
Description ............................................................763
ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........764
Introduction ..........................................................
.764
Two Trip Detection Logic .......................................764
Emission-Related Diagnostic Information .............765
Malfunction Indicator Lamp (MIL) .........................780
OBD System Operation Chart ...............................782
BASIC SERVICE PROCEDURE .............................788
Basic Inspection ....................................................788
Idle Speed and Ignition Timing Check ..................793
Idle Mixture Ratio Adjustment ...............................795
VIN Registration ....................................................806
Accelerator Pedal Released Position Learning .....806
Throttle Valve Closed Position Learning ...............806
Idle Air Volume Learning .......................................807
Fuel Pressure Check ............................................809
TROUBLE DIAGNOSIS ..........................................811
Trouble Diagnosis Introduction .............................811
DTC Inspection Priority Chart ...............................817
Fail-Safe Chart ......................................................819
Symptom Matrix Chart ..........................................820
Engine Control Component Parts Location ...........824
Vacuum Hose Drawing .........................................833
Circuit Diagram .....................................................834
ECM Harness Connector Terminal Layout ............836
ECM Terminals and Reference Value ...................836
CONSULT-II Function (ENGINE) ..........................846
Generic Scan Tool (GST) Function .......................859
CONSULT-II Reference Value in Data Monitor .....862
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................866
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .868
Description ............................................................868
Testing Condition ..................................................868
Inspection Procedure ...........................................
.868
Diagnostic Procedure ............................................869
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-

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Revision: 2006 January2006 M35/M45 DENT ......................................................................878
Description ...........................................................878
Diagnostic Procedure ...........................................878
POWER SUPPLY AND GROUND CIRCUIT ..........879
Wiring Diagram ....................................................879
Diagnostic Procedure ...........................................880
Ground Inspection ................................................885
DTC U1000, U1001 CAN COMMUNICATION LINE .886
Description ...........................................................886
On Board Diagnosis Logic ...................................886
DTC Confirmation Procedure ...............................886
Wiring Diagram ....................................................887
Diagnostic Procedure ...........................................888
DTC U1010 CAN COMMUNICATION ....................889
Description ...........................................................889
On Board Diagnosis Logic ...................................889
DTC Confirmation Procedure ...............................889
Diagnostic Procedure ...........................................890
DTC P0011, P0021 IVT CONTROL ........................891
Description ...........................................................891
CONSULT-II Reference Value in Data Monitor Mode
.892
On Board Diagnosis Logic ...................................892
DTC Confirmation Procedure ...............................893
Wiring Diagram ....................................................894
Diagnostic Procedure ...........................................898
Component Inspection .........................................902
Removal and Installation ......................................903
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER ..................................................................904
Description ...........................................................904
CONSULT-II Reference Value in Data Monitor Mode
.904
On Board Diagnosis Logic ...................................904
DTC Confirmation Procedure ...............................904
Wiring Diagram ....................................................905
Diagnostic Procedure ...........................................908
Component Inspection .........................................910
Removal and Installation ......................................910
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER ..911
Description ............................................................ 911
CONSULT-II Reference Value in Data Monitor Mode
.. 911
On Board Diagnosis Logic .................................... 911
DTC Confirmation Procedure ...............................912
Wiring Diagram ...................................................
.913
Diagnostic Procedure ...........................................916
Component Inspection .........................................918
Removal and Installation ......................................919
DTC P0075, P0081 IVT CONTROL SOLENOID
VALVE .....................................................................920
Component Description ........................................920
CONSULT-II Reference Value in Data Monitor Mode
.920
On Board Diagnosis Logic ...................................920
DTC Confirmation Procedure ...............................920
Wiring Diagram ....................................................921
Diagnostic Procedure ...........................................925Component Inspection ..........................................926
Removal and Installation ......................................926
DTC P0101 MAF SENSOR .....................................927
Component Description ........................................927
CONSULT-II Reference Value in Data Monitor Mode
.927
On Board Diagnosis Logic ....................................927
DTC Confirmation Procedure ...............................928
Overall Function Check ........................................929
Wiring Diagram .....................................................930
Diagnostic Procedure ...........................................931
Component Inspection ..........................................934
Removal and Installation ......................................935
DTC P0102, P0103 MAF SENSOR ........................936
Component Description ........................................936
CONSULT-II Reference Value in Data Monitor Mode
.936
On Board Diagnosis Logic ....................................936
DTC Confirmation Procedure ...............................937
Wiring Diagram .....................................................938
Diagnostic Procedure ...........................................939
Component Inspection ..........................................941
Removal and Installation ......................................942
DTC P0112, P0113 IAT SENSOR ...........................943
Component Description ........................................943
On Board Diagnosis Logic ....................................943
DTC Confirmation Procedure ...............................943
Wiring Diagram .....................................................945
Diagnostic Procedure ...........................................946
Component Inspection ..........................................947
Removal and Installation ......................................947
DTC P0117, P0118 ECT SENSOR .........................948
Component Description ........................................948
On Board Diagnosis Logic ....................................948
DTC Confirmation Procedure ...............................949
Wiring Diagram .....................................................950
Diagnostic Procedure ...........................................951
Component Inspection ..........................................953
Removal and Installation ......................................953
DTC P0122, P0123 TP SENSOR ............................954
Component Description ........................................954
CONSULT-II Reference Value in Data Monitor Mode
.954
On Board Diagnosis Logic ....................................954
DTC Confirmation Procedure ...............................955
Wiring Diagram .....................................................956
Diagnostic Procedure ...........................................957
Component Inspection ..........................................960
Removal and Installation ......................................960
DTC P0125 ECT SENSOR .....................................961
Component Description ........................................961
On Board Diagnosis Logic ....................................961
DTC Confirmation Procedure ...............................962
Diagnostic Procedure ...........................................962
Component Inspection ..........................................963
Removal and Installation ......................................963
DTC P0127 IAT SENSOR .......................................964
Component Description ........................................964
On Board Diagnosis Logic ....................................964

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Revision: 2006 January2006 M35/M45 FUEL PUMP ..........................................................1427
Description ..........................................................1427
CONSULT-II Reference Value in Data Monitor Mode
1427
Wiring Diagram ...................................................1428
Diagnostic Procedure ..........................................1429
Component Inspection ........................................1433
Removal and Installation .....................................1433
REFRIGERANT PRESSURE SENSOR ................1434
Component Description .......................................1434
Wiring Diagram ...................................................1435
Diagnostic Procedure ..........................................1436
Removal and Installation .....................................1438
ELECTRICAL LOAD SIGNAL ...............................1439
Description ..........................................................1439
CONSULT-II Reference Value in Data Monitor Mode
1439
Diagnostic Procedure ..........................................1439
ICC BRAKE SWITCH ............................................1441
Component Description .......................................1441
CONSULT-II Reference Value in Data Monitor Mode
1441
Wiring Diagram ...................................................1442
Diagnostic Procedure ..........................................1443
Component Inspection ........................................1447
ASCD BRAKE SWITCH ........................................1449
Component Description .......................................1449
CONSULT-II Reference Value in Data Monitor Mode 1449
Wiring Diagram ....................................................1450
Diagnostic Procedure ..........................................1451
Component Inspection .........................................1455
ASCD INDICATOR ................................................. 1456
Component Description .......................................1456
CONSULT-II Reference Value in Data Monitor Mode
1456
Wiring Diagram ....................................................1457
Diagnostic Procedure ..........................................1458
MIL AND DATA LINK CONNECTOR .....................1459
Wiring Diagram ....................................................1459
SERVICE DATA AND SPECIFICATIONS (SDS) ...1461
Fuel Pressure ......................................................1461
Idle Speed and Ignition Timing ............................1461
Calculated Load Value .........................................1461
Mass Air Flow Sensor ..........................................1461
Intake Air Temperature Sensor ............................1461
Engine Coolant Temperature Sensor ..................1461
Fuel Tank Temperature Sensor ...........................1461
Crankshaft Position Sensor (POS) ......................1461
Camshaft Position Sensor (PHASE) ...................1461
A/F Sensor 1 Heater ............................................ 1461
Heated Oxygen Sensor 2 Heater ........................1462
Throttle Control Motor ..........................................1462
Fuel Injector .........................................................1462
Fuel Pump ...........................................................1462