INFINITI FX35 2004 Service Manual

CO-52
[VK45DE]
THERMOSTAT AND WATER CONTROL VALVE
Revision: 2004 November 2004 FX35/FX45
7. Disconnect radiator hose (upper) and water hoses from thermostat housing.
8. Disconnect heater hoses from water outlet and heater pipe.
9. 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 to the following, and install in the reverse order of removal.
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
CO-53
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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-36, "
LEAK CHECK" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant.
PBIC0158E

CO-54
[VK45DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2004 November 2004 FX35/FX45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitABS006JQ
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) 10.0 (10-5/8, 8-3/4)
Reservoir tank engine coolant capacity (at “MAX” level) 0.8 (7/8, 3/4)
Radiator cap relief pressureStandard 78 - 98 (0.8 - 1.0, 11 - 14)
Limit 59 (0.6, 9)
Leakage test pressure 157 (1.6, 23)
Valve opening temperature 80 - 84°C (176 - 183°F)
Maximum valve lift More than 10 mm/ 95°C (0.39 in/ 203°F)
Valve closing temperature 77°C (171°F)
Valve opening temperature 93.5 - 96.5°C (200 - 206°F)
Maximum valve lift More than 8 mm/ 108°C (0.315 in/ 226°F)
Valve closing temperature 90°C (194°F)

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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DRIVER INFORMATION SYSTEM
PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
COMBINATION METERS ........................................... 4
System Description .................................................. 4
UNIFIED METER CONTROL UNIT ...................... 4
UNIFIED METER AND A/C AMP. ......................... 4
HOW TO CHANGE THE DISPLAY FOR ODO/
TRIP METER ........................................................ 5
POWER SUPPLY AND GROUND CIRCUIT ........ 5
WATER TEMPERATURE GAUGE ........................ 6
TACHOMETER ..................................................... 6
FUEL GAUGE ....................................................... 6
SPEEDOMETER ................................................... 6
Component Parts and Harness Connector Location ..... 6
Combination Meter ................................................... 7
CHECK .................................................................. 7
Circuit Diagram ........................................................ 8
Wiring Diagram — METER — .................................. 9
Terminals and Reference Value for Combination
Meter ....................................................................... 11
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 12
Meter/Gauge Operation and Odo/Trip Meter ......... 12
SELF-DIAGNOSIS FUNCTION .......................... 12
HOW TO ALTERNATE DIAGNOSIS MODE ....... 12
CONSULT-II Function ............................................ 13
How to Proceed With Trouble Diagnosis ................ 13
Diagnosis Flow ....................................................... 13
Power Supply and Ground Circuit Inspection ........ 15
Symptom Chart 1 ................................................... 16
Symptom Chart 2 ................................................... 16
Vehicle Speed Signal Inspection ............................ 17
Engine Speed Signal Inspection ............................ 18
Water Temperature Signal Inspection .................... 19
Fuel Level Sensor Signal Inspection 1 ................... 20
FUEL GAUGE ..................................................... 20
Fuel Level Sensor Signal Inspection 2 ................... 21LOW-FUEL WARNING LAMP ............................. 21
CAN Communication System Inspection ................ 22
Communication Line Inspection ............................. 22
Odo/Trip Meter and Illumination Control Switch
Inspection ............................................................... 24
Fuel Gauge Pointer Fluctuates, Indicator Wrong
Value or Varies ....................................................... 24
Fuel Gauge Does Not Move to FULL position ........ 25
Electrical Components Inspection .......................... 25
CHECK FUEL LEVEL SENSOR UNIT ................ 25
Removal and Installation ........................................ 26
COMBINATION METER ASSEMBLY .................. 26
Disassembly and Assembly for Combination Meter ... 26
DISASSEMBLY ................................................... 26
ASSEMBLY ......................................................... 27
Removal and Installation of Odo/Trip Meter and Illu-
mination Control Switch .......................................... 27
REMOVAL ........................................................... 27
INSTALLATION ................................................... 27
UNIFIED METER AND A/C AMP .............................. 28
System Description ................................................. 28
INPUT/OUTPUT SIGNALS ................................. 28
FAIL-SAFE .......................................................... 29
CAN Communication System Description .............. 29
CAN Communication Unit ....................................... 29
Schematic ............................................................... 30
CONSULT-II Function ............................................. 31
CONSULT-II BASIC OPERATION ....................... 31
SELF-DIAGNOSTIC RESULTS ........................... 32
DATA MONITOR ................................................. 32
Removal and Installation of Unified Meter and A/C
Amp. ....................................................................... 34
REMOVAL ........................................................... 34
INSTALLATION ................................................... 34
COMPASS ................................................................. 35
System Description ................................................. 35
DIRECTION DISPLAY ......................................... 35
Wiring Diagram – COMPAS – ................................ 37
Removal and Installation of Compass .................... 38
WARNING LAMPS .................................................... 39

DI-2Revision: 2004 November 2004 FX35/FX45Schematic ............................................................... 39
Wiring Diagram — WARN — .................................. 40
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 48
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 49
Component Inspection ............................................ 50
OIL PRESSURE SWITCH ................................... 50
A/T INDICATOR ........................................................ 51
Wiring Diagram — AT/IND — ................................. 51
A/T Indicator Is Malfunction .................................... 53
WARNING CHIME ..................................................... 55
Component Parts and Harness Connector Location ... 55
System Description ................................................. 55
FUNCTION .......................................................... 55
IGNITION KEY WARNING CHIME (WITHOUT
INTELLIGENT KEY) ............................................ 56
IGNITION KEY WARNING CHIME (WITH INTEL-
LIGENT KEY) ...................................................... 56
LIGHT WARNING CHIME ................................... 57
SEAT BELT WARNING CHIME ........................... 57
CAN Communication System Description .............. 57
CAN Communication Unit ....................................... 57
Schematic ............................................................... 58
Wiring Diagram — CHIME — ................................. 59
Terminals and Reference Value for BCM ................ 62
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 63
Terminals and Reference Value for Combination
Meter ...................................................................... 64
How to Proceed With Trouble Diagnosis ................ 64
Preliminary Check .................................................. 65
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................... 65
CONSULT-II Function ............................................. 66
DIAGNOSTIC ITEMS DESCRIPTION ................. 66
CONSULT-II BASIC OPERATION PROCEDURE
... 66
DATA MONITOR .................................................. 67
ACTIVE TEST ..................................................... 67
SELF-DIAGNOSTIC RESULTS ........................... 67
All Warnings Are Not Operated .............................. 68
Key Warning Chime and Light Warning Chime Does
Not Operate (Seat Belt Warning Chime Does Oper-ate) .......................................................................... 69
Key Warning Chime Does Not Operate (Without
Intelligent Key) ........................................................ 70
Key Warning Chime Does Not Operate (With Intel-
ligent Key, When Mechanical Key Is Used) ............ 72
Key Warning Chime Does Not Operate (With Intel-
l i g e n t K e y , W h e n I n t e l l i g e n t K e y I s C a r r i e d W i t h T h e
Driver) ..................................................................... 74
Light Warning Chime Does Not Operate ................. 76
Seat Belt Warning Chime Does Not Operate .......... 77
CLOCK ...................................................................... 79
Wiring Diagram — CLOCK — ................................. 79
Removal and Installation of Clock ........................... 80
REMOVAL ............................................................ 80
INSTALLATION .................................................... 80
REAR VIEW MONITOR ............................................. 81
System Description ................................................. 81
POWER SUPPLY AND GROUND ....................... 81
AV COMMUNICATION LINE ............................... 81
REAR VIEW CAMERA OPERATION .................. 81
Component Parts and Harness Connector Location ... 82
Schematic ............................................................... 83
Wiring Diagram — R/VIEW — ................................ 84
Terminals and Reference Value for Rear View Cam-
era Control Unit ....................................................... 87
CONSULT-II Function ............................................. 87
CONSULT-II BASIC OPERATION ....................... 87
WORK SUPPORT ............................................... 88
DATA MONITOR .................................................. 89
Side Distance Guideline Correction ........................ 89
SIDE DISTANCE GUIDELINE CORRECTION
PROCEDURE ...................................................... 89
Power Supply and Ground Circuit Inspection ......... 91
Rear View Is Not Displayed With The A/T Selector
Lever In R-position .................................................. 92
The Rear View Image Is Distorted .......................... 96
Removal and Installation of Rear View Camera Con-
trol Unit .................................................................... 97
REMOVAL ............................................................ 97
INSTALLATION .................................................... 97
Removal and Installation of Rear View Camera ..... 97
REMOVAL ............................................................ 97
INSTALLATION .................................................... 98

PRECAUTION
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PRECAUTION PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
AKS0054B
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.
WARNING:

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.
Wiring Diagrams and Trouble Diagnosis AKS0054D
When you read wiring diagrams, refer to the following:

Refer to GI-15, "How to Read Wiring Diagrams" .

Refer toPG-3, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit.
When you perform trouble diagnosis, refer to the following:

Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" .

Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" .

DI-4
COMBINATION METERS
Revision: 2004 November 2004 FX35/FX45
COMBINATION METERSPFP:24814
System DescriptionAKS005MH
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*.
*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.

Odo/trip meter, A/T indicator and ICC system display segments can be checked in diagnosis mode.

Meters/gauges can be checked in diagnosis mode.
Illumination Control
The unified meter control unit outputs the odo/trip meter and A/T
indicator lighting when the ignition switch is turned on. When the
lighting switch is turned on, light on for the combination meter dial,
illumination control switch and external lighting are output. In addi-
tion, when the lighting switch is turned on, the illumination control
switch on the left side of the combination meter can be used to
adjust the brightness of each light. The brightness can be adjusted
to sixteen different levels: From 0 (no lights) to 15 (maximum).
Pressing the illumination control switch will brighten or darken the
lights. When the key switch is in the START position, the combina-
tion meter dial lighting and illumination control switch lighting are
turned off.
UNIFIED METER AND A/C AMP.
Refer to DI-28, "System Description" in “UNIFIED METER AND A/C AMP”.
SKIA4795E

COMBINATION METERS
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Revision: 2004 November 2004 FX35/FX45
HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER

The vehicle speed signal and the memory signals from the meter memory circuit are processed by the
combination meter and the mileage is displayed.

Switch modes with following procedure.

When trip transfer switch is pressed, trip meter display changes.

If trip reset switch is pressed for 1 second or more while trip A is
displayed, only trip A is reset. (Same with trip B.)

If the battery is disconnected, odometer mileage will be retained
but the trip meter is reset to 0.0.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No. 19, located in the fuse block (J/B)]

to combination meter terminal 8, and

to unified meter and A/C amp. terminal 21.
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 7

through 10A fuse [No. 12, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 22.
With the ignition switch in the ACC or ON position, power is supplied

through 15A fuse [No. 10, located in the fuse block (J/B)], and

through 15A fuse [No. 11, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 46.
Ground is supplied

to combination meter terminals 5, 6 and 15

through body grounds M35, M45 and M85

to unified meter and A/C amp. terminals 29 and 30

through body grounds M35, M45 and M85.
PKIA2382E
SKIA4817E

DI-6
COMBINATION METERS
Revision: 2004 November 2004 FX35/FX45
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides a water temperature signal to unified meter and A/C amp. with CAN communication line. Uni-
fied meter and A/C amp. provides a water temperature signal to combination meter for water temperature
gauge with communication line between unified meter and A/C amp. and combination meter.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to unified meter and A/C amp. with CAN communication line. Unified
meter and A/C amp. provides an engine speed signal to combination meter for tachometer with communica-
tion line between unified meter and A/C amp. and combination meter.
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 36

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 28 for the fuel gauge.
Unified meter and A/C amp. provides an fuel level signal to combination meter for fuel gauge with communica-
tion line between unified meter and A/C amp. and combination meter.
SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the unified meter and A/C amp.
with CAN communication line. After unified meter and A/C amp. received the vehicle speed signal, it changes
the signal to 8 pulse signal and provides the 8 pulse signal to the combination meter for the speedometer.
Component Parts and Harness Connector LocationAKS005MI
SKIA4796E

COMBINATION METERS
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Combination MeterAKS005MJ
CHECK
SKIA8759E