2007 INFINITI M35 heater

ENGINE COOLANT
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Revision: 2007 April2007 M35/M45
CAUTION:
Be sure to clean radiator drain plug and install with new O-ring.
If water drain plugs on cylinder block are removed, close and tighten them. Refer to EM-257,
"ASSEMBLY" .
2. Make sure that each hose clamp has been firmly tightened.
3. Remove air relief plug (1) on heater hose.
4. Fill thermostat housing and reservoir tank to specified level.

Refill engine coolant up to filler neck of thermostat housing.

Pour engine coolant through engine coolant filler neck slowly of less than 2 (2-1/8 US qt, 1-3/4
Imp qt) a minute to allow air in system to escape.

Use Genuine NISSAN Long Life Antifreeze/Coolant or equivalent mixed with water (distilled or
demineralized). Refer to MA-12, "
RECOMMENDED FLUIDS AND LUBRICANTS" .

When engine coolant overflows air relief hole on heater hose,
install air relief plug.
5. Install radiator cap.
6. Warm up until opening thermostat. Standard for warming-up time is approximately 10 minutes at 3,000
rpm.

Make sure thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.
CAUTION:
Watch water temperature gauge so as not to overheat engine.
7. Stop engine and cool down to less than approximately 50°C (122°F).

Cool down using a fan to reduce the time.

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.Radiator drain plug:
: 1.2 N·m (0.12 kg-m, 11 in-lb)
: Engine front
PBIC3394E
Engine coolant capacity
(With reservoir tank at “MAX” level):
Approx. 10.4 (11 US qt, 9-1/8 Imp qt)
Reservoir tank engine coolant capacity
(At “MAX” level):
0.8 (7/8 US qt, 3/4 lmp qt)
Air relief plug:
: 1.2 N·m (0.12 kg-m, 11 in-lb)
SMA412B

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ENGINE COOLANT
Revision: 2007 April2007 M35/M45
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-257,
"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 N·m (0.12 kg-m, 11 in-lb)
: Engine front
PBIC3394E
Air relief plug:
: 1.2 N·m (0.12 kg-m, 11 in-lb)

THERMOSTAT AND WATER CONTROL VALVE
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Revision: 2007 April2007 M35/M45
THERMOSTAT AND WATER CONTROL VALVEPFP:21200
ComponentsNBS004RR

Refer to GI-11, "Components" for symbols 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-253, "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: 2007 April2007 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 - 183°F) 93.5 - 96.5°C (200 - 206°F)
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 (171°F) 90°C (194°F)
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 (commercial service tool) 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

DI-104
COMPASS
Revision: 2007 April2007 M35/M45
Zone Variation Setting ProcedureNKS004F5
NOTE:
The zone setting is factory preset (“default” setting) to zone 8.
1. Press and hold the compass switch for 3 – 9 seconds.
2. The current zone setting appears on the compass display.
3. Find the current geographical location number in the Zone Varia-
tion Chart.
4. Select the new zone number. (Press the compass switch until
the new zone number appears on the compass display.)
5. After select the new zone number, the compass display will
automatically shows a direction within a few seconds.
6. Preform the following Calibration Procedure for more accurate
indications.
Calibration ProcedureNKS004F6
NOTE:
The compass calibrates itself under normal driving conditions. However, occasional circumstances may cause
the compass to operate inaccurately. Example: Driving from rural (wide open) areas to crowded city areas, or
if an aftermarket (i.e., non original equipment) antenna with a magnetic base is attached to the vehicle. Cali-
brate the mirror compass if the display shows only one direction or a limited number of directions.
NOTE:

If “magnetic hats” are used in the dealership for vehicle identification, remove the hat from the vehicle
before performing the following steps. Do NOT put the hat back on the vehicle after the procedure is com-
pleted.

Drive the vehicle to an open level area; away from large metallic objects, structures, and overhead power
lines.

Turn off “non-essential” electrical accessories (rear window defrost, heater/air conditioning, wipers) and
close the doors.
1. Verify the correct compass zone setting for the geographical location. Refer to DI-104, "
Zone Variation
Setting Procedure" .
2. Press and hold the compass switch for more than 9 seconds.
3. “C” is displayed on the compass display, when calibration starts.
4. Drive slowly [less than 8 km/h (5 mph)] in a circle until the “C / CAL” is replaced with primary headings (N,
NE, E, SE, S, SW, W, or NW).
NOTE:
This will require driving at least 2 complete 360 degree circles; 3 complete circles may be required.
5. The compass calibration procedure is now complete. The compass should operate normally.
NOTE:
If at any time the compass continually displays the incorrect direction or the reading is erratic or locked,
repeat the calibration procedure.
SEL168Y

EC-2Revision: 2007 April2007 M35/M45 Inspection Procedure ............................................143
Diagnostic Procedure ...........................................144
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................153
Description ............................................................153
Diagnostic Procedure ...........................................153
POWER SUPPLY AND GROUND CIRCUIT ...........154
Wiring Diagram .....................................................154
Diagnostic Procedure ...........................................155
Ground Inspection ................................................160
DTC U1000, U1001 CAN COMMUNICATION LINE .161
Description ............................................................161
On Board Diagnosis Logic ....................................161
DTC Confirmation Procedure ...............................161
Wiring Diagram .....................................................162
Diagnostic Procedure ...........................................163
DTC U1010 CAN COMMUNICATION .....................164
Description ............................................................164
On Board Diagnosis Logic ....................................164
DTC Confirmation Procedure ...............................164
Diagnostic Procedure ...........................................165
DTC P0011, P0021 IVT CONTROL ........................166
Description ............................................................166
CONSULT-II Reference Value in Data Monitor Mode
.166
On Board Diagnosis Logic ....................................167
DTC Confirmation Procedure ...............................167
Diagnostic Procedure ...........................................168
Component Inspection ..........................................169
Removal and Installation ......................................169
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER ..................................................................170
Description ............................................................170
CONSULT-II Reference Value in Data Monitor Mode
.170
On Board Diagnosis Logic ....................................170
DTC Confirmation Procedure ...............................170
Wiring Diagram .....................................................171
Diagnostic Procedure ...........................................174
Component Inspection ..........................................176
Removal and Installation ......................................176
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .177
Description ............................................................177
CONSULT-II Reference Value in Data Monitor Mode
.177
On Board Diagnosis Logic ....................................177
DTC Confirmation Procedure ...............................178
Wiring Diagram .....................................................179
Diagnostic Procedure ...........................................182
Component Inspection ..........................................184
Removal and Installation ......................................184
DTC P0075, P0081 IVT CONTROL SOLENOID
VALVE .....................................................................185
Component Description ........................................185
CONSULT-II Reference Value in Data Monitor Mode
.185
On Board Diagnosis Logic ....................................185
DTC Confirmation Procedure ...............................185
Wiring Diagram .....................................................186Diagnostic Procedure ............................................190
Component Inspection ..........................................192
Removal and Installation .......................................192
DTC P0101 MAF SENSOR .....................................193
Component Description ........................................193
CONSULT-II Reference Value in Data Monitor Mode
.193
On Board Diagnosis Logic ....................................193
DTC Confirmation Procedure ................................194
Overall Function Check .........................................195
Wiring Diagram .....................................................196
Diagnostic Procedure ............................................197
Component Inspection ..........................................200
Removal and Installation .......................................201
DTC P0102, P0103 MAF SENSOR .........................202
Component Description ........................................202
CONSULT-II Reference Value in Data Monitor Mode
.202
On Board Diagnosis Logic ....................................202
DTC Confirmation Procedure ................................203
Wiring Diagram .....................................................204
Diagnostic Procedure ............................................205
Component Inspection ..........................................207
Removal and Installation .......................................208
DTC P0112, P0113 IAT SENSOR ............................209
Component Description ........................................209
On Board Diagnosis Logic ....................................209
DTC Confirmation Procedure ................................209
Wiring Diagram .....................................................211
Diagnostic Procedure ............................................212
Component Inspection ..........................................213
Removal and Installation .......................................213
DTC P0117, P0118 ECT SENSOR ..........................214
Component Description ........................................214
On Board Diagnosis Logic ....................................214
DTC Confirmation Procedure ................................215
Wiring Diagram .....................................................216
Diagnostic Procedure ............................................217
Component Inspection ..........................................218
Removal and Installation .......................................218
DTC P0122, P0123 TP SENSOR ............................219
Component Description ........................................219
CONSULT-II Reference Value in Data Monitor Mode
.219
On Board Diagnosis Logic ....................................219
DTC Confirmation Procedure ................................220
Wiring Diagram .....................................................221
Diagnostic Procedure ............................................222
Component Inspection ..........................................225
Removal and Installation .......................................225
DTC P0125 ECT SENSOR ......................................226
Component Description ........................................226
On Board Diagnosis Logic ....................................226
DTC Confirmation Procedure ................................227
Diagnostic Procedure ............................................227
Component Inspection ..........................................228
Removal and Installation .......................................228
DTC P0127 IAT SENSOR ........................................229
Component Description ........................................229

EC-8Revision: 2007 April2007 M35/M45 .683
Wiring Diagram .....................................................684
Diagnostic Procedure ...........................................685
Component Inspection ..........................................689
IGNITION SIGNAL ..................................................691
Component Description ........................................691
Wiring Diagram .....................................................692
Diagnostic Procedure ...........................................697
Component Inspection ..........................................702
Removal and Installation ......................................703
REFRIGERANT PRESSURE SENSOR ..................704
Component Description ........................................704
Wiring Diagram .....................................................705
Diagnostic Procedure ...........................................706
Removal and Installation ......................................708
SNOW MODE SWITCH ...........................................709
Description ............................................................709
CONSULT-II Reference Value in the Data Monitor
Mode .....................................................................709
Wiring Diagram .....................................................710
Diagnostic Procedure ...........................................711
Component Inspection ..........................................713
MIL AND DATA LINK CONNECTOR ......................714
Wiring Diagram .....................................................714
SERVICE DATA AND SPECIFICATIONS (SDS) ....716
Fuel Pressure .......................................................716
Idle Speed and Ignition Timing .............................716
Calculated Load Value ..........................................716
Mass Air Flow Sensor ...........................................716
Intake Air Temperature Sensor .............................716
Engine Coolant Temperature Sensor ...................716
Fuel Tank Temperature Sensor ............................716
Crankshaft Position Sensor (POS) .......................716
Camshaft Position Sensor (PHASE) ....................716
A/F Sensor 1 Heater .............................................716
Heated Oxygen Sensor 2 Heater .........................717
Throttle Control Motor ...........................................717
Fuel Injector ..........................................................717
Fuel Pump ............................................................717
VK45DE
INDEX FOR DTC .....................................................718
DTC No. Index ......................................................718
Alphabetical Index ................................................722
PRECAUTIONS .......................................................726
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................726
Precautions for Procedures without Cowl Top Cover .726
On Board Diagnostic (OBD) System of Engine and
A/T ........................................................................726
Precaution ............................................................727
PREPARATION .......................................................730
Special Service Tools ...........................................730
Commercial Service Tools ....................................731
ENGINE CONTROL SYSTEM ................................732
System Diagram ...................................................732
Multiport Fuel Injection (MFI) System ...................733Electronic Ignition (EI) System ..............................735
Fuel Cut Control (At No Load and High Engine
Speed) ..................................................................736
AIR CONDITIONING CUT CONTROL ....................737
Input/Output Signal Chart .....................................737
System Description ...............................................737
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .738
System Description ...............................................738
Component Description ........................................739
CAN COMMUNICATION .........................................740
System Description ...............................................740
EVAPORATIVE EMISSION SYSTEM .....................741
Description ............................................................741
Component Inspection ..........................................744
Removal and Installation .......................................745
How to Detect Fuel Vapor Leakage ......................745
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ....................................................................748
System Description ...............................................748
Diagnostic Procedure ............................................749
Component Inspection ..........................................751
POSITIVE CRANKCASE VENTILATION ................753
Description ............................................................753
Component Inspection ..........................................753
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ......................................................................755
Description ............................................................755
ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........756
Introduction ...........................................................756
Two Trip Detection Logic .......................................756
Emission-Related Diagnostic Information .............757
Malfunction Indicator Lamp (MIL) .........................772
OBD System Operation Chart ...............................774
BASIC SERVICE PROCEDURE .............................780
Basic Inspection ....................................................780
Idle Speed and Ignition Timing Check ..................785
Procedure After Replacing ECM ...........................787
VIN Registration ....................................................787
Accelerator Pedal Released Position Learning .....788
Throttle Valve Closed Position Learning ...............788
Idle Air Volume Learning .......................................788
Fuel Pressure Check ............................................790
TROUBLE DIAGNOSIS ..........................................792
Trouble Diagnosis Introduction .............................792
DTC Inspection Priority Chart ...............................798
Fail-Safe Chart ......................................................800
Symptom Matrix Chart ..........................................801
Engine Control Component Parts Location ...........805
Vacuum Hose Drawing .........................................814
Circuit Diagram .....................................................815
ECM Harness Connector Terminal Layout ............817
ECM Terminals and Reference Value ...................817
CONSULT-II Function (ENGINE) ..........................826
Generic Scan Tool (GST) Function .......................838
CONSULT-II Reference Value in Data Monitor .....841
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................845
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .847
Description ............................................................847