check engine INFINITI FX35 2005 Service Manual

CO-52
[VK45DE]
WATER PUMP
Revision: 2005 July 2005 FX
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-37, "
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: 2005 July 2005 FX
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 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 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)
PBIC0157E

THERMOSTAT AND WATER CONTROL VALVE CO-55
[VK45DE]
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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-37, "
LEAK CHECK" .

Start and warm up engine. Visually check if there is no leaks of engine coolant.
PBIC0158E

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
HOW TO CHANGE THE DISPLAY FOR ODO/
TRIP METER ................................................... ..... 6
POWER SUPPLY AND GROUND CIRCUIT ... ..... 6
SPEEDOMETER .............................................. ..... 7
TACHOMETER ................................................ ..... 7
WATER TEMPERATURE GAUGE ................... ..... 7
FUEL GAUGE .................................................. ..... 7
Component Parts and Harness Connector Location ..... 7
Arrangement of Combination Meter .................... ..... 8
Circuit Diagram ................................................... ..... 9
Wiring Diagram — METER — ............................. ... 10
Terminals and Reference Value for Combination
Meter ................................................................... ... 12
Terminals and Reference Value for Unified Meter
and A/C Amp. ...................................................... ... 13
Self-Diagnosis Mode of Combination Meter ........ ... 14
SELF-DIAGNOSIS FUNCTION ....................... ... 14
OPERATION PROCEDURE ............................ ... 14
CONSULT-II Function (METER A/C AMP) .......... ... 14
Trouble Diagnosis ............................................... ... 15
HOW TO PERFORM TROUBLE DIAGNOSIS ... 15
PRELIMINARY CHECK ................................... ... 15
Symptom Chart 1 ................................................ ... 17
Symptom Chart 2 ................................................ ... 17
Power Supply and Ground Circuit Inspection ..... ... 18
Vehicle Speed Signal Inspection ......................... ... 20
Engine Speed Signal Inspection ......................... ... 21
Engine Coolant Temperature Signal Inspection .. ... 21
Fuel Level Sensor Signal 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 .... ... 24
Electrical Components Inspection ....................... ... 25
CHECK FUEL LEVEL SENSOR UNIT ............. ... 25
Removal and Installation of Combination Meter .. ... 25
Disassembly and Assembly of 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 (METER A/C AMP) .......... ... 31
CONSULT-II BASIC OPERATION .................... ... 31
SELF-DIAGNOSTIC RESULTS ........................ ... 32
DATA MONITOR .............................................. ... 32
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
COMPASS .............................................................. ... 38
System Description .............................................. ... 38
DIRECTION DISPLAY ...................................... ... 38
Wiring Diagram – COMPAS – ............................. ... 40
Removal and Installation of Compass ................. ... 41
WARNING LAMPS ................................................. ... 42
Schematic ............................................................ ... 42
Wiring Diagram — WARN — ............................... ... 43
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) .......................................................... ... 51

COMBINATION METERS DI-15
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Trouble DiagnosisAKS005MQ
HOW TO PERFORM TROUBLE DIAGNOSIS
1. Confirm the symptom or customer complaint.
2. Perform preliminary check. Refer to DI-15, "
PRELIMINARY CHECK" .
3. According to the symptom chart, repair or replace the cause of the symptom. Refer to DI-17, "
Symptom
Chart 1" .
4. Does the meter operate normally? If so, GO TO 5. If not, GO TO 2.
5. INSPECTION END
PRELIMINARY CHECK
1. CHECK SELF-DIAGNOSTIC RESULTS OF UNIFIED METER AND A/C AMP.
Select “METER A/C AMP” on CONSULT-II, and perform self-diagnosis of unified meter and A/C amp. Refer to
DI-31, "
CONSULT-II Function (METER A/C AMP)" .
Self-diagnostic results content
No malfunction detected>>GO TO 2.
Malfunction detected>> Go to DI-17, "
Symptom Chart 2" .
2. CHECK WARNING LAMP ILLUMINATION
Turn ignition switch ON. (Engine stopped)
Do warning lamps (such as malfunction indicator lamp and oil pressure warning lamp) illuminate?
YES >> GO TO 3.
NO >> Check power supply circuit of combination meter when ignition switch is ON. Refer to DI-18,
"Power Supply and Ground Circuit Inspection" .
3. CHECK SELF-DIAGNOSIS OPERATION OF COMBINATION METER
Perform combination meter self-diagnosis. Refer to DI-14, "
SELF-DIAGNOSIS FUNCTION" .
Does self-diagnosis function operate?
YES >> GO TO 5.
NO >> GO TO 4.
4. CHECK POWER SUPPLY AND GROUND CIRCUIT OF COMBINATION METER
Check power supply and ground circuit of combination meter. Refer to DI-18, "
Power Supply and Ground Cir-
cuit Inspection" .
OK or NG
OK >> Replace combination meter.
NG >> Repair as need.

DI-20
COMBINATION METERS
Revision: 2005 July 2005 FX
Vehicle Speed Signal InspectionAKS005MV
Symptom: Indication is irregular for the speedometer and odo/trip meter.
1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
Preform the ABS actuator and electric unit (control unit) self-diagnosis. Refer to BRC-25, "
CONSULT-II Func-
tions" .
Self
-diagnostic results content
No malfunction detected>>GO TO 2.
Malfunction detected>>Check applicable parts, and repair or replace corresponding parts.
2. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL
1. Start engine and 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 (R/G) and ground.
OK or NG
OK >> GO TO 3.
NG >>

If monitor indicates “0 V” constantly, repair or replace malfunctioning parts after checking each
unit inputting vehicle speed signal (8 pulse), harness and connector between each unit and uni-
fied meter and A/C amp.

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." .
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 (R/G) and unified meter and A/C amp. harness
connector M56 terminal 26 (R/G).
OK or NG
OK >> Replace combination meter.
NG >> Repair harness or connector. 26 (R/G) – Ground:
NOTE:
Maximum voltage may be 5 V due
to specifications (connected units).
SKIB0338E
PKIA1935E
1 (R/G) – 26 (R/G) : Continuity should exist.
SKIB0343E

COMBINATION METERS DI-21
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Engine Speed Signal Inspection AKS005MW
Symptom: Tachometer indication is malfunction.
1. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL
1. Start an engine and select “METER A/C AMP” on CONSULT-II.
2. 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-132, "CON-
SULT-II Function (ENGINE)" (for VQ35DE) or EC-822,
"CONSULT-II Function (ENGINE)" (for VK45DE).
NG >> Replace unified meter and A/C amp. Refer to DI-37,
"Removal and Installation of Unified Meter and A/C Amp." .
Engine Coolant Temperature Signal InspectionAKS005MX
Symptom: Water temperature gauge indication is malfunction.
1. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Start engine and select “METER A/C AMP” on CONSULT-II.
2. 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.
PKIA2090E
SKIA4367E
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

DI-22
COMBINATION METERS
Revision: 2005 July 2005 FX
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-132, "CON-
SULT-II Function (ENGINE)" (for VQ35DE) or EC-822,
"CONSULT-II Function (ENGINE)" (for 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 InspectionAKS005MY
Symptom:

Fuel gauge indication is malfunction.

Low-fuel warning lamp indication is irregular.
NOTE:
The following symptoms are not malfunction.
Fuel level sensor unit

Depending on vehicle position or driving circumstance, the fuel level in the tank various, 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 position or driving circumstance, the fuel in the tank flows and the warning lamp ON
timing may change.
1. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Select “METER A/C AMP” on CONSULT-II.
2. Using “FUEL METER” on “DATA MONITOR”, compare the value of “DATA MONITOR” with fuel gauge pointer of combination
meter.
OK or NG
OK >> GO TO 2.
NG >> Replace combination meter.
2. CHECK FUEL LEVEL SENSOR
Check components. Refer to DI-25, "
CHECK FUEL LEVEL SENSOR UNIT" .
OK or NG
OK >> GO TO 3.
NG >> Replace fuel level sensor unit.
SKIA4368E
Fuel gauge pointer Reference value of data monitor [lit.]
Full Approx. 86
Three quarters Approx. 70 Half Approx. 48
A quarter Approx. 25 Empty Approx. 9
PKIA2088E

DI-28
UNIFIED METER AND A/C AMP
Revision: 2005 July 2005 FX
UNIFIED METER AND A/C AMPPFP:27760
System DescriptionAKS005N8

For the unified meter and A/C amp., the signal required for controlling the combination meter are inte-
grated in the A/C auto amp.

Unified meter and A/C amp. controls each operation for A/C auto amp. For information regarding A/C con-
trol, refer to AT C - 3 0 , "
AIR CONDITIONER CONTROL" in ATC section.

Unified meter and A/C amp. inputs necessary information for combination meter from each unit by CAN
communication and so on.

And unified meter and A/C amp. outputs these signals using communication line (TX, RX) between unified
meter and A/C amp. and combination meter.

The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and sent to the display unit (without NAVI) display control unit (with NAVI) using
CAN communication.

Other input signals are also sent to the ECM, TCM, AWD control unit, BCM, display unit (without NAVI)
and display control unit (with NAVI) using CAN communication.

The unified meter and A/C amp. correspond a CONSULT-II function (self-diagnostic results, CAN diag-
nostic support monitor, data monitor).
INPUT/OUTPUT SIGNALS
Between Unified Meter & A/C amp. and Combination Meter
Unit Input Output
Unified meter and A/C amp.

Seat belt buckle switch signal (Driver's side)

Parking brake signal

Illumination control nighttime required signal

Refuel status signal

Low-fuel warning lamp condition signal

Combination meter receive error signal

Delivery destination data signal

Combination meter specifications signal

Vehicle speed signal (8-pulse)

Engine speed signal

Engine coolant temperature signal

Fuel level sensor signal (resistance value)

Malfunction indicator lamp signal

ABS warning lamp signal

Low tire pressure warning lamp signal

Brake warning lamp signal

A/T CHECK warning lamp signal

ICC warning lamp signal

Oil pressure switch signal

Door switch signal

AWD warning lamp signal

VDC OFF indicator lamp signal

SLIP indicator lamp signal

CRUISE indicator lamp signal

SET indicator lamp signal

High beam request signal

Turn indicator signal

Snow mode switch signal

ICC system display signal

A/T position indicator signal

Manual mode indicator signal

Manual mode gear position signal

CAN communication condition signal of A/T

Position lights request signal

Buzzer output signal

DI-34
UNIFIED METER AND A/C AMP
Revision: 2005 July 2005 FX
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
*: Monitor keeps indicating “OFF” when brake warning lamp is on by the parking brake operation or low brake
fluid level.
DTC [U1000] CAN Communication CircuitAKS00CM7
Symptom: Display CAN COMM CIRC [U1000] at the result of self-diagnosis for unified meter and A/C amp.
1. CHECK CAN COMMUNICATION
1. Select “SELF-DIAG RESULTS” mode for “METER A/C AMP” with CONSULT-II.
2. Print out CONSULT-II screen.
>> Go to “CAN system”. Refer to LAN-5, "
Precautions When Using CONSULT-II" .
DTC [B2202] Meter Communication CircuitAKS00CM8
Symptom: Display METER COMM CIRC [B2202] at the result of self-diagnosis for unified meter and A/C amp.
1. CHECK CONNECTOR
Check combination meter, unified meter and A/C amp. and terminals (combination meter side, unified meter
and A/C amp. side, and harness side) for looseness or bent terminals.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
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.
BRAKE SW [ON/OFF] X Indicates [ON/OFF] condition of brake switch (stop lamp switch).
AT-M IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T manual mode indicator.
AT-M GEAR [5-1] X X Indicates [5-1] condition of A/T manual mode gear position.
P RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift P range indicator.
R RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift R range indicator.
N RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift N range indicator.
D RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift D range indicator.
AT CHECK W/L X Indicates [ON/OFF] condition of AT CHECK warning lamp.
CRUISE IND [ON/OFF] X Indicates [ON/OFF] condition of CRUISE indicator lamp.
SET IND [ON/OFF] X Indicates [ON/OFF] condition of SET indicator lamp.
CRUISE W/L [ON/OFF] X Indicates [ON/OFF] condition of ICC warning lamp.
4WD LOCK SW [ON/OFF] X Indicates [ON/OFF] condition of snow mode switch.
4WD LOCK IND [ON/OFF] X Indicates [ON/OFF] condition of SNOW indicator lamp.
4WD W/L [ON/OFF] X Indicates [ON/OFF] condition of AWD warning lamp. Display item [Unit]
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