INFINITI M35 2006 Factory Service Manual

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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

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SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2006 January2006 M35/M45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitNBS004RT
ENGINE COOLANT CAPACITY (APPROXIMATE)
Unit: (US qt, Imp qt)
RADIATOR
Unit: kPa (kg/cm2 , psi)
THERMOSTAT
WATER CONTROL VALVE
Engine coolant capacity (With reservoir tank at “MAX” level) 10.4 (11, 9-1/8)
Reservoir tank engine coolant capacity (at “MAX” level) 0.6 (5/8, 1/2)
Radiator cap relief pressureStandard 78 - 98 (0.8 - 1.0, 11 - 14)
Limit 59 (0.6, 9)
Leakage testing pressure 157 (1.6, 23)
ThermostatStandard
Valve opening temperature 80 - 84
C (176 - 183F)
Maximum valve lift More than 10 mm/ 95
C (0.39 in/ 203F)
Valve closing temperature 77
C (171F)
Water control valveStandard
Valve opening temperature 93.5 - 96.5
C (200 - 206F)
Maximum valve lift More than 8 mm/ 108
C (0.315 in/ 226F)
Valve closing temperature 90
C (194F)

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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SECTION DI
A
B
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DRIVER INFORMATION SYSTEM
PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
PREPARATION ........................................................... 4
Commercial Service Tools ........................................ 4
COMBINATION METERS ........................................... 5
System Description .................................................. 5
UNIFIED METER CONTROL UNIT ...................... 5
UNIFIED METER AND A/C AMP. ......................... 5
POWER SUPPLY AND GROUND CIRCUIT ........ 5
SPEEDOMETER ................................................... 6
TACHOMETER ..................................................... 6
WATER TEMPERATURE GAUGE ........................ 6
FUEL GAUGE ....................................................... 7
ODO/TRIP METER ............................................... 7
METER ILLUMINATION CONTROL ..................... 8
FAIL-SAFE ............................................................ 9
Arrangement of Combination Meter ....................... 10
Component Parts and Harness Connector Location .... 11
Internal Circuit ........................................................ 12
Wiring Diagram — METER — ................................ 13
Terminals and Reference Value for Combination
Meter ...................................................................... 15
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 16
Self-Diagnosis Mode of Combination Meter ........... 17
SELF-DIAGNOSIS FUNCTION .......................... 17
OPERATION PROCEDURE ............................... 17
CONSULT-II Function (METER A/C AMP) ............. 18
Trouble Diagnosis .................................................. 18
HOW TO PERFORM TROUBLE DIAGNOSIS ... 18
PRELIMINARY CHECK ...................................... 18
Symptom Chart ...................................................... 18
Power Supply and Ground Circuit Inspection ........ 19
Vehicle Speed Signal Inspection ............................ 20
Engine Speed Signal Inspection ............................ 21
Engine Coolant Temperature Signal Inspection ..... 22
Fuel Level Sensor Signal Inspection ...................... 22
Fuel Gauge Pointer Fluctuates, Indicator Wrong Value or Varies ....................................................... 25
Fuel Gauge Does Not Move to FULL Position ....... 25
Electrical Components Inspection .......................... 26
CHECK FUEL LEVEL SENSOR UNIT ................ 26
Removal and Installation of Combination Meter ..... 27
REMOVAL ........................................................
... 27
INSTALLATION ................................................... 27
Disassembly and Assembly of Combination Meter ... 27
DISASSEMBLY ................................................... 27
ASSEMBLY ......................................................... 27
UNIFIED METER AND A/C AMP ...........................
... 28
System Description ................................................. 28
COMBINATION METER CONTROL FUNCTION ... 28
A/C AUTO AMP. FUNCTION ............................... 29
OTHER FUNCTIONS .......................................... 29
Schematic ............................................................... 30
CONSULT-II Function (METER A/C AMP) ............. 31
CONSULT-II BASIC OPERATION ....................... 31
SELF-DIAG RESULTS ........................................ 32
DATA MONITOR ................................................. 33
Power Supply and Ground Circuit Inspection ......... 35
DTC [U1000] CAN Communication Circuit ............. 36
DTC [B2202] Meter Communication Circuit ........... 36
DTC [B2205] Vehicle Speed Circuit ........................ 39
Removal and Installation of Unified Meter and A/C
Amp. ....................................................................... 39
REMOVAL ........................................................
... 39
INSTALLATION ................................................... 39
WARNING LAMPS .................................................... 40
System Description ................................................. 40
OIL PRESSURE WARNING LAMP ..................... 40
Component Parts and Harness Connector Location ... 41
Schematic ............................................................... 42
Wiring Diagram — WARN — .................................. 43
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 53
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 54
Electrical Component Inspection ............................ 55
OIL PRESSURE SWITCH ................................... 55

DI-2Revision: 2006 January2006 M35/M45 A/T INDICATOR ........................................................ 56
System Description ................................................. 56
MANUAL MODE .................................................. 56
NOT MANUAL MODE ......................................... 56
Wiring Diagram — AT/IND — ................................. 57
A/T Indicator Is Malfunction .................................... 59
WARNING CHIME .................................................. ... 60
System Description ................................................. 60
POWER SUPPLY AND GROUND CIRCUIT ....... 60
IGNITION KEY WARNING CHIME (WITH INTEL-
LIGENT KEY) ...................................................... 61
LIGHT WARNING CHIME ................................... 61
SEAT BELT WARNING CHIME ........................... 61
Component Parts and Harness Connector Location ... 62
Schematic ............................................................... 63
Wiring Diagram — CHIME — ................................. 64
Terminals and Reference Value for Combination
Meter ...................................................................... 67
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 67
Terminals and Reference Value for BCM ................ 68
CONSULT-II Function (BCM) .................................. 69
CONSULT-II BASIC OPERATION ....................... 69
DATA MONITOR .................................................. 70
ACTIVE TEST ..................................................... 71
SELF-DIAG RESULTS ........................................ 71
CONSULT-II Function (METER A/C AMP) ............. 71
Trouble Diagnosis ................................................... 71
HOW TO PERFORM TROUBLE DIAGNOSIS .... 71
PRELIMINARY INSPECTION ............................. 71
SYMPTOM CHART ............................................. 72
Meter Buzzer Circuit Inspection .............................. 72
Lighting Switch Signal Inspection ........................... 73
Front Door Switch (Driver Side) Signal Inspection ... 73
Seat Belt Buckle Switch Signal Inspection ............. 74
Electrical Component Inspection ............................ 76
FRONT DOOR SWITCH (DRIVER SIDE) ........... 76
SEAT BELT BUCKLE SWITCH (DRIVER SIDE) ... 76
CAN COMMUNICATION ........................................... 77
System Description ................................................. 77
CAN Communication Unit ....................................... 77
LANE DEPARTURE WARNING SYSTEM ................ 78
Precautions for Lane Departure Warning (LDW)
system .................................................................... 78
System Description ................................................. 78
LDW SYSTEM OPERATION ............................... 78
POWER SUPPLY AND GROUND CIRCUIT ....... 80
Action Test ...........................................................
... 80
LDW SYSTEM RUNNING TEST ......................... 80
Camera Aiming Adjustment .................................... 81
OUTLINE ............................................................. 81
PREPARATION ................................................... 81TARGET SETTING .............................................. 81
VEHICLE HEIGHT CHECK ................................. 84
AIMING ADJUSTMENT ....................................... 84
Component Parts and Harness Connector Location ... 88
Wiring Diagram — LDW — ..................................... 89
Terminals and Reference Value for LDW Camera
Unit .......................................................................... 91
CONSULT-II Function (LDW) .................................. 91
DESCRIPTION .................................................... 91
CONSULT-II BASIC OPERATION ....................... 91
WORK SUPPORT ............................................... 92
SELF-DIAG RESULTS ......................................... 92
DATA MONITOR .................................................. 93
ACTIVE TEST ...................................................... 94
Trouble Diagnosis ................................................... 95
HOW TO PERFORM TROUBLE DIAGNOSIS .... 95
PRELIMINARY INSPECTION .............................. 95
SYMPTOM CHART .............................................. 96
Power Supply and Ground Circuit Inspection ......... 96
DTC [C1B00] CAMERA UNIT MALF ...................... 97
DTC [C1B01] CAM AIMING INCMP ....................... 97
DTC [C1B02] VHCL SPD DATA MALF ................... 97
DTC [C1B03] ABNRML TEMP DETECT ................ 97
DTC [U1000] CAN COMM CIRCUIT ...................... 98
DTC [U1010] CONTROL UNIT (CAN) .................... 98
LDW Chime Circuit Inspection ................................ 98
LDW Switch Circuit Inspection ................................ 99
LDW Indicator Lamp Circuit Inspection .................102
Turn Signal Input Inspection .................................103
Electrical Component Inspection ..........................103
LDW SWITCH ....................................................103
Removal and Installation for LDW Camera Unit ...103
REMOVAL ..........................................................103
INSTALLATION ..................................................103
Removal and Installation for LDW Chime .............104
REMOVAL ..........................................................104
INSTALLATION ..................................................104
Removal and Installation for LDW Switch .............104
COMPASS ...............................................................105
System Description ...............................................105
DIRECTION DISPLAY .......................................105
Zone Variation Change Procedure ........................105
Correction Functions of the Compass Display ......105
AUTOMATIC CORRECTION .............................105
MANUAL CORRECTION PROCEDURE ...........105
Wiring Diagram – COMPAS – ...............................106
Removal and Installation of Compass ...................107
CLOCK ....................................................................108
Wiring Diagram — CLOCK — ...............................108
Removal and Installation of Clock .........................109
REMOVAL ..........................................................109
INSTALLATION ..................................................109

PRECAUTION
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PRECAUTION PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NKS003TT
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WAR NING :
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.

DI-4
PREPARATION
Revision: 2006 January2006 M35/M45
PREPARATIONPFP:00002
Commercial Service ToolsNKS003TU
Tool nameDescription
Power toolLoosening bolts, nuts and screws
PIIB1407E

COMBINATION METERS
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COMBINATION METERSPFP:24814
System DescriptionNKS003TV
UNIFIED METER CONTROL UNIT
Speedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled by the
unified meter control unit, which is built into the combination meter. Unified meter control unit receives sig-
nals from unified meter and A/C amp.
Warning lamp and indicator lamp of combination meter are controlled by signals drawn from the unified
meter and A/C amp.
Digital meter is adopted for odo/trip meter.
NOTE:
The record of the odo meter is kept even if the battery cable is disconnected. The record of the trip meter
is erased when the battery cable is disconnected.
Dot matrix LCD is adopted to display “push engine starter”, “A/T position” and “ICC system* ”.
Odo/trip meter and dot matrix LCD segments can be checked in self-diagnosis mode.
Meters/gauges can be checked in self-diagnosis mode.
*: With ICC system
UNIFIED METER AND A/C AMP.
Refer to DI-28, "COMBINATION METER CONTROL FUNCTION" in “UNIFIED METER AND A/C AMP”.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times
through 10A fuse [No. 21, located in the fuse block (J/B)]
to combination meter terminal 23,
through 10A fuse [No. 19, located in the fuse block (J/B)]
to unified meter and A/C amp. terminal 54.
With the ignition switch in the ACC or ON position, power is supplied
through 10A fuse [No. 6, located in the fuse block (J/B)],
to combination meter terminal 2, and
to unified meter and A/C amp. terminal 41.
With the ignition switch in the ON or START position, power is supplied
through 10A fuse [No. 14, located in the fuse block (J/B)]
to combination meter terminal 12,
through 10A fuse [No. 12, located in the fuse block (J/B)]
to unified meter and A/C amp. terminal 53.
Ground is supplied
to combination meter terminals 9, 10 and 11
to unified meter and A/C amp. terminals 55 and 71
through grounds M16 and M70.

DI-6
COMBINATION METERS
Revision: 2006 January2006 M35/M45
SPEEDOMETER
The speedometer indicates the vehicle speed.
ABS actuator and electric unit (control unit) converses a pulse signal from wheel sensor to vehicle speed
signal, and transmit vehicle speed signal to unified meter and A/C amp. with CAN communication.
Unified meter and A/C amp. transmits vehicle speed signal to combination meter with communication line.
Combination meter converses vehicle speed signal to the angle signal, and commands to speedometer.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM converses a signal from crankshaft position sensor to engine speed signal, and transmits to unified
meter and A/C amp. with CAN communication.
Unified meter and A/C amp. transmits engine speed signal to combination meter with communication line.
Combination meter converses engine speed signal to the angle signal, and commands to tachometer.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM converses a signal from engine coolant temperature sensor to engine coolant temperature signal,
and transmits to unified meter and A/C amp. with CAN communication.
Unified meter and A/C amp. transmits engine coolant temperature signal to combination meter with com-
munication line.
Combination meter converses engine coolant temperature signal to the angle signal, and commands to
water temperature gauge.
PKIC0696E
PKIB7631E
PKIB7632E

COMBINATION METERS
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FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by a variable ground signal supplied
from unified meter and A/C amp. terminal 58
through the fuel level sensor unit and fuel pump (main) terminals 5 and 2, and
through the fuel level sensor unit (sub) terminals 2 and 1
to unified meter and A/C amp. terminal 42.
Unified meter and A/C amp. provides a fuel level signal to combination meter for fuel gauge with communica-
tion line between unified meter and A/C amp. and combination meter.
ODO/TRIP METER
ABS actuator and electric unit (control unit) converses a pulse signal from wheel sensor to vehicle speed
signal, and transmits vehicle speed signal to unified meter and A/C amp. with CAN communication.
Unified meter and A/C amp. converses vehicle speed signal to 8 pulse signal, and transmits to combina-
tion meter.
Combination meter processes the 8 pulse signal and the memory signals from the meter memory circuit.
Then the mileage is displayed.
How to Change The Display For Odo/trip Meter
Operating the odo/trip meter switch allows switching the mode in the following order.
The odo/trip meter display switching and trip display resetting
can be identified by the time from pressing the odo/trip meter
switch (1) to releasing it.
When resetting with “trip A” displayed, only “trip A” display is
reset. (The same way for “trip B”.)
SEL175W
PKIB7633E