engine remova INFINITI FX35 2006 Workshop Manual

COOLING FAN CO-49
[VK45DE]
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Revision: 2006 December 2006 FX35/FX45
COOLING FANPFP:21140
Components (Crankshaft Driven type)NBS005RY
Removal and InstallationNBS003KO
REMOVAL
1. Remove air duct (inlet). Refer to EM-177, "AIR CLEANER AND AIR DUCT" .
2. Remove engine front undercover with power tool.
3. Remove radiator shroud (lower). Refer to CO-41, "
RADIATOR" .
4. Remove drive belts. Refer to EM-174, "
DRIVE BELTS" .
5. Remove fan coupling and cooling fan assembly. CAUTION:
Do not damage or scratch radiator core when removing.
6. Remove cooling fan from fan coupling.
INSPECTION AFTER REMOVAL
Fan Coupling
Inspect fan coupling for oil leakage and bimetal conditions.

If anything is found, replace fan coupling.
Cooling Fan
Inspect cooling fan for crack or unusual bend.

If anything is found, replace cooling fan.
INSTALLATION
Note the following, install in the reverse order of removal.

Install cooling fan with its front mark “F” facing front of vehicle. Refer to CO-49, "Removal and Installation"
.
1. Cooling fan 2. Fan coupling 3. Fan pulley
4. Water pump
PBIC1537E
SLC072

CO-50
[VK45DE]
COOLING FAN
Revision: 2006 December 2006 FX35/FX45
Components (Motor Driven Type)NBS005RZ
Removal and InstallationNBS003KP
REMOVAL
1. Remove front grille. Refer to EI-22, "FRONT GRILLE" .
2. Disconnect harness connector from fan motor.
3. Remove cooling fan assembly. CAUTION:
Do not damage or scratch A/C condenser when removed.
INSTALLATION
Install in the reverse order of removal.

Cooling fan is controlled by ECM. For details. Refer to EC-1171, "DTC P1217 ENGINE OVER TEMPER-
ATURE" .
Disassembly and Assembly (Motor Driven Type)NBS003KQ
DISASSEMBLY
1. Remove cooling fan from fan motor.
2. Remove fan motor from fan grille.
INSPECTION AFTER DISASSEMBLY
Cooling Fan
Inspect cooling fan for crack or unusual bend.

If anything is found, replace cooling fan.
ASSEMBLY
Assemble in the reverse order of disassembly.
1. Cooling fan 2. Fan grille 3. Fan motor
PBIC1666E

WATER PUMP CO-51
[VK45DE]
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Revision: 2006 December 2006 FX35/FX45
WAT E R P U MPPFP:21020
ComponentsNBS005S0
Removal and InstallationNBS003KR
CAUTION:

When removing water pump, be careful not to get engine coolant on drive belts.

Water pump can not be disassembled and should be replaced as a unit.

After installing water pump, connect hose and clamp securely, then check for leaks using radiator
cap tester (commercial service tool) and radiator cap tester adapter [SST: EG17650301 (J33984-
A)].
REMOVAL
1. Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to CO-38, "Chang-
ing Engine Coolant" and EM-249, "DISASSEMBLY" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
2. Remove following parts:

Engine front undercover

Air duct (inlet); Refer to EM-177, "AIR CLEANER AND AIR DUCT" .

Alternator, water pump and A/C compressor belt; Refer to EM-174, "DRIVE BELTS" .
3. Remove fan coupling with cooling fan, and then water pump pulley.
4. Remove water pump.

Engine coolant will leak from cylinder block, so have a receptacle ready under vehicle.
CAUTION:

Handle the water pump vane so that it does not contact any other parts.

Do not disassemble water pump.
1. Water pump pulley 2. Water pump 3. Gasket
PBIC1538E

CO-52
[VK45DE]
WATER PUMP
Revision: 2006 December 2006 FX35/FX45
INSPECTION AFTER REMOVAL

Visually check that there is no significant dirt or rusting on water
pump body and vane.

Make sure there is no looseness in vane shaft, and that it turns
smoothly when rotated by hand.

If anything is found, replace water pump.
INSTALLATION
Install in the reverse order of removal.
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301 (J–33984-A)] and
radiator cap tester (commercial service tool). Refer to CO-38, "
LEAK CHECK" .

Start and warm up engine. Visually check if there is no leaks of engine coolant.
PBIC1539E

CO-54
[VK45DE]
THERMOSTAT AND WATER CONTROL VALVE
Revision: 2006 December 2006 FX35/FX45

Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS003KS
REMOVAL
1. Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to CO-38, "Chang-
ing Engine Coolant" and EM-249, "DISASSEMBLY" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
2. Remove engine cover with power tool. Refer to EM-173, "
ENGINE ROOM COVER" .
3. Remove air duct (inlet). Refer to EM-177, "
AIR CLEANER AND AIR DUCT" .
4. Disconnect water suction hose from water inlet.
5. Remove water inlet and thermostat. CAUTION:
Do not disassemble thermostat.
6. Remove intake manifolds (upper and lower). Refer to EM-179, "
INTAKE MANIFOLD" .
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 temper-
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.
D. To heater core E. To cylinder head (left bank) F. To cylinder head (right bank)
G. To intake manifold adapter
SLC252B
Thermostat Water control valve
Valve opening temperature 80 - 84 °C (176 - 183 °F) 93.5 - 96.5 °C (200 - 206 °F)
Maximum valve lift More 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)

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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DRIVER INFORMATION SYSTEM
PRECAUTION ....................................................... ..... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 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
COMBINATION METER ILLUMINATION CON-
TROL ................................................................ ..... 8
FAIL-SAFE ....................................................... ..... 8
Component Parts and Harness Connector Location ..... 9
Arrangement of Combination Meter .................... ... 10
Circuit Diagram ................................................... .... 11
Wiring Diagram — METER — ............................. ... 12
Terminals and Reference Value for Combination
Meter ................................................................... ... 14
Terminals and Reference Value for Unified Meter
and A/C Amp. ...................................................... ... 15
Self-Diagnosis Mode of Combination Meter ........ ... 15
SELF-DIAGNOSIS FUNCTION ....................... ... 15
OPERATION PROCEDURE ............................ ... 15
CONSULT-II Function (METER A/C AMP) .......... ... 16
Trouble Diagnosis ............................................... ... 16
HOW TO PERFORM TROUBLE DIAGNOSIS ... 16
PRELIMINARY CHECK ................................... ... 17
Symptom Chart ................................................... ... 17
Power Supply and Ground Circuit Inspection ..... ... 18
Vehicle Speed Signal Inspection ......................... ... 19
Engine Speed Signal Inspection ......................... ... 20
Engine Coolant Temperature Signal Inspection .. ... 21
Fuel Level Sensor Signal Inspection ................... ... 21
Fuel Gauge Pointer Fluctuates, Indicator Wrong
Value or Varies .................................................... ... 23 Fuel Gauge Does Not Move to FULL Position ....
... 23
Odo/Trip Meter and Illumination Control Switch
Inspection ............................................................ ... 24
Electrical Components Inspection ....................... ... 24
ODO/TRIP METER AND ILLUMINATION CON-
TROL SWITCH ................................................. ... 24
FUEL LEVEL SENSOR UNIT .......................... ... 24
Removal and Installation of Combination Meter .. ... 25
Disassembly and Assembly of Combination Meter ... 25
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
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 ..................................... ... 31
DATA MONITOR .............................................. ... 32
Power Supply and Ground Circuit Inspection ...... ... 33
DTC [U1000] CAN Communication Circuit .......... ... 34
DTC [B2202] Meter Communication Circuit ........ ... 34
DTC [B2205] Vehicle Speed Circuit ..................... ... 37
Removal and Installation of Unified Meter and A/C
Amp. .................................................................... ... 37
REMOVAL ........................................................ ... 37
INSTALLATION ................................................ ... 37
WARNING LAMPS ................................................. ... 38
System Description .............................................. ... 38
OIL PRESSURE WARNING LAMP .................. ... 38
Schematic ............................................................ ... 39
Wiring Diagram — WARN — ............................... ... 40
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) .......................................................... ... 48

COMBINATION METERS DI-19
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Revision: 2006 December 2006 FX35/FX45
Vehicle Speed Signal InspectionNKS002ZP
Symptom: Speedometer and odo/trip meter indication is malfunction.
1. CHECK COMBINATION METER INPUT SIGNAL
1. Connect CONSULT-II, and start engine.
2. Select “METER A/C AMP” on CONSULT-II.
3. Using “SPEED METER” on “DATA MONITOR”, compare the value of “DATA MONITOR” with speedometer pointer of combi-
nation meter.
OK or NG
OK >> Perform self-diagnosis of ABS actuator and electric unit (control unit). Refer to BRC-24, "
CONSULT-II Functions
(VDC)" .
NG >> GO TO 2.
2. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL
1. Drive vehicle at approximately 40 km/h (25 MPH).
2. Check voltage signal between unified meter and A/C amp. har- ness connector M56 terminal 26 and ground.
OK or NG
OK >> GO TO 3.
NG-1 >> If monitor indicates “0 V” constantly, perform the following.
1. Check each unit inputting vehicle speed signal (8 pulse), harness and connector between each unit and unified meter and A/C amp.
2. Repair or replace malfunctioning part.
NG-2 >> If monitor indicates “5 V” or “12 V” constantly, replace unified meter and A/C amp. Refer to DI-37,
"Removal and Installation of Unified Meter and A/C Amp." .
SKIB4578E
26 – Ground: NOTE:
Maximum voltage may be 5 V due
to specifications (connected units).
SKIB0338E
PKIA1935E

DI-20
COMBINATION METERS
Revision: 2006 December 2006 FX35/FX45
3. CHECK CONTINUITY BETWEEN COMBINATION METER AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and unified meter and A/C amp. connector.
3. Check continuity between combination meter harness connector M20 terminal 1 and unified meter and A/C amp. harness con-
nector M56 terminal 26.
OK or NG
OK >> Replace combination meter.
NG >> Repair harness or connector.
Engine Speed Signal Inspection NKS002ZQ
Symptom: Tachometer indication is malfunction.
1. CHECK COMBINATION METER INPUT SIGNAL
1. Connect CONSULT-II, and start engine.
2. Select “METER A/C AMP” on CONSULT-II.
3. Using “TACHO METER” on “DATA MONITOR”, compare the value of “DATA MONITOR” with tachometer pointer of combina-
tion meter.
OK or NG
OK >> GO TO 2.
NG >> Replace combination meter.
2. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Select “ENGINE” on CONSULT-II.
2. Using “ENG SPEED” on “DATA MONITOR”, print out the CON- SULT-II screen when the engine is idling.
3. Select “METER A/C AMP” on CONSULT-II.
4. Using “TACHO METER” on “DATA MONITOR”, compare the value of “DATA MONITOR” of the idling speed with that of the
“ENG SPEED”.
OK or NG
OK >> Perform ECM self-diagnosis. Refer to EC-119, "CON-
SULT-II Function (ENGINE)" (VQ35DE) or EC-780,
"CONSULT-II Function (ENGINE)" (VK45DE).
NG >> Replace unified meter and A/C amp. Refer to DI-37,
"Removal and Installation of Unified Meter and A/C Amp." .
1 – 26 : Continuity should exist.
SKIB0343E
PKIA2090E
SKIA4367E

COMBINATION METERS DI-21
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Revision: 2006 December 2006 FX35/FX45
Engine Coolant Temperature Signal InspectionNKS002ZR
Symptom: Water temperature gauge indication is malfunction.
1. CHECK COMBINATION METER INPUT SIGNAL
1. Connect CONSULT-II, and start engine.
2. Select “METER A/C AMP” on CONSULT-II.
3. Using “W TEMP METER” on “DATA MONITOR”, compare the value of “DATA MONITOR” with water temperature gauge
pointer of combination meter.
OK or NG
OK >> GO TO 2.
NG >> Replace combination meter.
2. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Select “ENGINE” on CONSULT-II.
2. Using “COOLAN TEMP/S” on “DATA MONITOR”, print out the CONSULT-II screen.
3. Select “METER A/C AMP” on CONSULT-II.
4. Using “W TEMP METER” on “DATA MONITOR”, compare the value of “DATA MONITOR” with that of the “COOLAN TEMP/S”.
OK or NG
OK >> Perform ECM self-diagnosis. Refer to EC-119, "CON-
SULT-II Function (ENGINE)" (VQ35DE) or EC-780,
"CONSULT-II Function (ENGINE)" (VK45DE).
NG >> Replace unified meter and A/C amp. Refer to DI-37,
"Removal and Installation of Unified Meter and A/C
Amp." .
Fuel Level Sensor Signal InspectionNKS002ZS
Symptom:

Fuel gauge indication is malfunctioning.

Low-fuel warning lamp indication is irregular.
NOTE:
The following symptoms are not malfunctions.
Fuel gauge

Depending on vehicle posture or driving circumstance, the fuel level in the tank varies, and the pointer
may fluctuate.

If the vehicle is fueled with the ignition switch ON, the pointer will move slowly.
Low-fuel warning lamp

Depending on vehicle posture or driving circumstance, the fuel in the tank flows and the warning lamp ON
timing may change.
Water temperature gauge pointer Reference value of data monitor [ °C ( °F)]
Hot Approx. 130 (266)
Middle Approx. 70 - 105 (158 - 221) Cold Approx. 50 (122)
PKIA2091E
SKIA4368E

UNIFIED METER AND A/C AMP DI-35
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Revision: 2006 December 2006 FX35/FX45
2. CHECK METER/GAUGES VISUALLY
Check the pointer on the meter/gauge fluctuate at the engine start.
Is the fluctuation acceptable?
YES >> GO TO 3.
NO >> GO TO 6.
3. CHECK CONTINUITY COMMUNICATION CIRCUIT (TX: COMBINATION METER)
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and unified meter and A/C amp. connector.
3. Check continuity between combination meter harness connector M20 terminal 13 and unified meter and A/C amp. harness con-
nector M55 terminal 19.
4. Check continuity between combination meter harness connector M20 terminal 13 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK VOLTAGE OF UNIFIED METER AND A/C AMP.
1. Connect unified meter and A/C amp. connector.
2. Turn ignition switch ON.
3. Check voltage between combination meter harness connector M20 terminal 13 and ground.
OK or NG
OK >> GO TO 5.
NG >> Replace unified meter and A/C amp. Refer to DI-37,
"Removal and Installation of Unified Meter and A/C
Amp."
13 – 19 : Continuity should exist.
13 – Ground : Continuity should not exist.
SKIA4837E
13 – Ground : Approx. 5 V
SKIA4886E