check engine INFINITI FX35 2004 Service Manual

BRC-44
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
5. PERFORM DATA MONITOR
1. Connect steering angle sensor and ABS actuator and electric unit (control unit) connectors.
2. Perform “DATA MONITOR” of the “STEERING ANGLE SIGNAL” to check if the status is normal.
OK or NG
OK >> Re-perform ABS actuator and electric unit (control unit) self-diagnosis.
NG >> Replace steering angle sensor and adjust neutral position of steering angle sensor. Refer to BRC-
6, "Adjustment of Steering Angle Sensor Neutral Position" .
Inspection 6: Yaw Rate/Side G-Sensor (2WD model), Yaw Rate/Side/Decel G-
sensor (AWD models) System
AFS001SY
DTC C1145, C1146, C1113
CAUTION:
Sudden turns (such as spin turns, acceleration turns), drifting, etc. May cause the G-sensor system
indicate a malfunction. However, this is not a malfunction, if normal operation can be resumed after
restarting engine.
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
CAUTION:
When on a turntable, such as at a parking structure entrance, or when on a moving object with engine
running, VDC OFF indicator lamp might turn on and self-diagnosis using CONSULT-II the yaw rate sen-
sor system might be displayed, but in this case there is no malfunction in yaw rate sensor system. As
soon as vehicle leaves turntable or moving object, restart engine to return the system to normal.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect G-sensor connector and ABS actuator and electric unit (control unit) connector and check ter-
minals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace
terminal.
2. Reconnect connectors and re-perform a ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
Steering condition Data monitor
Straight-ahead -3.5 deg - +3.5 deg
Turn wheel to the right by 90°. Approx. -90 deg
Turn wheel to the left by 90°. Approx. +90 deg
Self-diagnostic results
YAW RATE SENSOR
SIDE G-SEN CIRCUIT
G-SENSOR (AWD model)

TROUBLE DIAGNOSIS
BRC-49
[VDC/TCS/ABS]
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3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY (1)
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Turn ignition switch OFF. Check voltage between ABS actuator
and electric unit (control unit) harness connector E56 and
ground.
3. Turn ignition switch ON (but do not start engine). Check voltage
between ABS actuator and electric unit (control unit) harness
connector E56 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND SYSTEM
Check ABS actuator and electric unit (control unit) ground system.
OK or NG
OK >> Perform ABS actuator and electric unit (control unit) self-
diagnosis again.
NG >> Repair or replace harness or connectors.
5. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY (2)
1. Check fuse 10A (terminal 4) and 30A (terminal 32).
2. Turn ignition switch OFF and check continuity between battery
positive terminal and ABS actuator and electric unit (control unit)
harness connector E56.
OK or NG
OK >> Check for non-standard conditions in battery (terminal
looseness, low voltage, etc.) and alternator.
NG >>

Replace fuse 10A or 30A.

Open or short in harness. ABS actuator and electric
unit (control unit)
(Harness connector E56)GroundVoltage (V)
(Approx.)
32 (R) — 12 V
ABS actuator and electric
unit (control unit)
(Harness connector E56)GroundVoltage (V)
(Approx.)
4 (G) — 12 V
SFIA1200E
ABS actuator and electric
unit (control unit)
(Harness connector E56)Ground Continuity
16 (B) — Yes
SFIA1434E
ABS actuator and elec-
tric unit (control unit)
(Harness connector E56)Battery positive
terminalContinuity
4 (G), 32 (R) — Yes
SFIA1435E

TROUBLE DIAGNOSIS
BRC-55
[VDC/TCS/ABS]
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Revision: 2004 November 2004 FX35/FX45
Symptom 5: Pedal Vibration or ABS Operation Sound OccursAFS001TB
CAUTION:
Under the following conditions, when brake pedal is lightly depressed (just place a foot on it), ABS is
activated and vibration is felt. However, this is normal.

When shifting gears

When driving on slippery road

During cornering at high speed

When passing over bumps or grooves

When pulling away just after starting engine [at approximately 10 km/h (6MPH) or higher]
1. SYMPTOM CHECK 1
Check if pedal vibration or operation sound occurs when engine is started.
OK or NG
OK >> Perform self-diagnosis. Refer to BRC-27, "SELF-DIAGNOSIS" .
NG >> GO TO 2.
2. SYMPTOM CHECK 2
Check symptom when electrical component (headlamps, etc.) switches are operated.
Does the symptom occur when the electrical component (head lamp, etc.) switches are operated?
YES >> Check if there is a radio, antenna, antenna lead wire, or wiring close to ABS actuator and electric
unit (control unit) (or its wiring), and if there is, move it farther away.
NO >> GO TO symptom 1 “Step 2”. Refer to BRC-53, "
Symptom 1: Excessive ABS Function Operation
Frequency" .
Symptom 6: Vehicle Jerks During VDC/TCS/ABS ControlAFS001TC
1. CHECK ENGINE SPEED SIGNAL
Perform CONSULT-II “DATA MONITOR” to check engine speed.
Is engine speed at idle 400 rpm or higher?
YES >> GO TO 3.
NO >> GO TO 2.
2. ABS WARNING LAMP DISPLAY CHECK
Make sure warning lamp turns off approximately 2 sec. After turn ignition switch ON or when driving.
OK or NG
OK >> System is normal.
NG >> GO TO 3.
3. CHECK ECM SELF-DIAGNOSTIC RESULTS
Perform ECM self-diagnosis.
Are self-diagnosis items displayed?
YES >> Check the corresponding items. Refer to EC-77, "TROUBLE DIAGNOSIS" (VQ35DE), EC-726,
"TROUBLE DIAGNOSIS" (VK45DE) in “Engine Control (EC section)”.
NO >> GO TO 4.
4. CHECK A/T SELF-DIAGNOSTIC RESULTS
Perform A/T self-diagnosis.
OK or NG
OK >> GO TO 5.
NG >> Check the corresponding items. Refer toAT- 4 2 , "
TROUBLE DIAGNOSIS" in “A/T”.

CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION CO
A
CO
Revision: 2004 November 2004 FX35/FX45
ENGINE COOLING SYSTEM
VQ35DE
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for Liquid Gasket .................................. 3
REMOVAL OF LIQUID GASKET SEALING .......... 3
LIQUID GASKET APPLICATION PROCEDURE ..... 3
PREPARATION ........................................................... 5
Special Service Tools ............................................... 5
Commercial Service Tools ........................................ 6
OVERHEATING CAUSE ANALYSIS .......................... 7
Troubleshooting Chart .............................................. 7
COOLING SYSTEM .................................................... 9
Cooling Circuit .......................................................... 9
System Drawing ..................................................... 10
ENGINE COOLANT ...................................................11
Inspection ................................................................ 11
LEVEL CHECK .................................................... 11
CHECKING COOLING SYSTEM FOR LEAKS .... 11
Changing Engine Coolant ....................................... 11
DRAINING ENGINE COOLANT .......................... 11
REFILLING ENGINE COOLANT ........................ 12
FLUSHING COOLING SYSTEM ......................... 13
RADIATOR ................................................................ 14
Removal and Installation ........................................ 14
REMOVAL ........................................................... 14
INSTALLATION ................................................... 15
INSPECTION AFTER INSTALLATION ............... 15
Checking Radiator Cap .......................................... 15
Checking Radiator .................................................. 16
RADIATOR (ALUMINUM TYPE) .............................. 17
Disassembly and Assembly ................................... 17
PREPARATION ................................................... 17
DISASSEMBLY ................................................... 17
ASSEMBLY ......................................................... 18
INSPECTION ...................................................... 20
COOLING FAN ......................................................... 21
Removal and Installation ........................................ 21
REMOVAL ........................................................... 21INSTALLATION ................................................... 21
Disassembly and Assembly .................................... 21
DISASSEMBLY ................................................... 21
ASSEMBLY ......................................................... 21
WATER PUMP .......................................................... 22
Removal and Installation ........................................ 22
REMOVAL ........................................................... 22
INSPECTION AFTER REMOVAL ....................... 24
INSTALLATION ................................................... 24
INSPECTION AFTER INSTALLATION ................ 25
WATER INLET AND THERMOSTAT ASSEMBLY .... 26
Removal and Installation ........................................ 26
REMOVAL ........................................................... 26
INSPECTION AFTER REMOVAL ....................... 27
INSTALLATION ................................................... 27
INSPECTION AFTER INSTALLATION ................ 27
WATER OUTLET AND WATER PIPING ................... 28
Removal and Installation ........................................ 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 28
INSPECTION AFTER INSTALLATION ................ 28
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 29
Standard and Limit .................................................. 29
ENGINE COOLANT CAPACITY (APPROXI-
MATE) .................................................................. 29
THERMOSTAT .................................................... 29
RADIATOR .......................................................... 29
VK45DE
PRECAUTIONS ........................................................ 30
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................. 30
PREPARATION ......................................................... 31
Special Service Tools ............................................. 31
Commercial Service Tools ...................................... 31
OVERHEATING CAUSE ANALYSIS ........................ 32
Troubleshooting Chart ............................................ 32

CO-2Revision: 2004 November 2004 FX35/FX45 COOLING SYSTEM .................................................. 34
Cooling Circuit ........................................................ 34
System Drawing ..................................................... 35
ENGINE COOLANT .................................................. 36
Inspection ............................................................... 36
LEVEL CHECK .................................................... 36
LEAK CHECK ...................................................... 36
Changing Engine Coolant ....................................... 36
DRAINING ENGINE COOLANT .......................... 36
REFILLING ENGINE COOLANT ......................... 37
FLUSHING COOLING SYSTEM ......................... 38
RADIATOR ................................................................ 39
Removal and Installation ........................................ 39
REMOVAL ........................................................... 39
INSTALLATION .................................................... 41
INSPECTION AFTER INSTALLATION ................ 41
Checking Radiator Cap .......................................... 41
Checking Radiator .................................................. 41
RADIATOR (ALUMINUM TYPE) ............................... 43
Disassembly and Assembly .................................... 43
PREPARATION ................................................... 43
DISASSEMBLY ................................................... 43
ASSEMBLY ......................................................... 44
INSPECTION ....................................................... 46
COOLING FAN .......................................................... 47
Removal and Installation (Crankshaft Driven Type) ... 47
REMOVAL ........................................................... 47
INSPECTION AFTER REMOVAL ........................ 47INSTALLATION .................................................... 47
Removal and Installation (Motor Driven Type) ........ 48
REMOVAL ............................................................ 48
INSTALLATION .................................................... 48
Disassembly and Assembly (Motor Driven Type) ... 48
DISASSEMBLY .................................................... 48
INSPECTION AFTER DISASSEMBLY ................ 48
ASSEMBLY .......................................................... 48
WATER PUMP ........................................................... 49
Removal and Installation ......................................... 49
REMOVAL ............................................................ 49
INSPECTION AFTER REMOVAL ........................ 49
INSTALLATION .................................................... 50
INSPECTION AFTER INSTALLATION ................ 50
THERMOSTAT AND WATER CONTROL VALVE ..... 51
Removal and Installation ......................................... 51
REMOVAL ............................................................ 51
INSPECTION AFTER REMOVAL ........................ 52
INSTALLATION .................................................... 52
INSPECTION AFTER INSTALLATION ................ 53
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 54
Standard and Limit .................................................. 54
ENGINE COOLANT CAPACITY (APPROXI-
MATE) .................................................................. 54
RADIATOR ........................................................... 54
THERMOSTAT ..................................................... 54
WATER CONTROL VALVE .................................. 54

OVERHEATING CAUSE ANALYSIS
CO-7
[VQ35DE]
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OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartABS004UZ
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat stuck closed —
Damaged finsDust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ate
Fan assembly — High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper engine coolant
mixture ratio—— —
Poor engine coolant quality — Engine coolant density —
Insufficient engine coolantEngine coolant leaksCooling hoseLoose clamp
Cracked hose
Water pump Poor sealing
Radiator capLoose
Poor sealing
RadiatorO-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tankExhaust gas leaks into
cooling systemCylinder head deterioration
Cylinder head gasket dete-
rioration

CO-8
[VQ35DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2004 November 2004 FX35/FX45
Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

ENGINE COOLANT
CO-11
[VQ35DE]
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ENGINE COOLANTPFP:KQ100
InspectionABS004T8
LEVEL CHECK

Check if the reservoir tank engine coolant level is within the
“MIN” to “MAX” when engine is cool.

Adjust the engine coolant level as necessary.
CHECKING COOLING SYSTEM FOR LEAKS

To check for leaks, apply pressure to the cooling system with
radiator cap tester (commercial service tool) and radiator cap
tester adapter (SST).
WARNING:
Do not remove radiator cap when engine is hot. Serious
burns could occur from high-pressure engine coolant
escaping from radiator.
CAUTION:
Higher test pressure than specified may cause radiator
damage.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.

If anything is found, repair or replace damaged parts.
Changing Engine CoolantABS004T9
WARNING:

To avoid being scalded, never change engine coolant when engine is hot.

Wrap a thick cloth around cap and carefully remove cap. First, turn cap a quarter of a turn to
release built-up pressure. Then turn cap all the way.
DRAINING ENGINE COOLANT
1. Remove front engine undercover with power tool.
2. Open radiator drain plug at the bottom of radiator, and remove
radiator cap.
CAUTION:
Be careful not to allow engine coolant to contact drive belts.
When drain all of engine coolant in the system, open water drain plugs on cylinder block. Refer to
EM-121, "
DISASSEMBLY" .
3. Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
SMA412B
Testing pressure
: 157 kPa (1.6 kg/cm
2 , 23 psi)
SLC756A
SBIA0444E

ENGINE COOLANT
CO-13
[VQ35DE]
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8. Repeat steps 3 through 6 two or more times with radiator cap installed until engine coolant level no longer
drops.
9. Check cooling system for leaks with engine running.
10. 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.
11. Repeat step 10 three times.
12. If sound is heard, bleed air from cooling system by repeating step 3 through 6 until engine coolant level no
longer drops.

Clean excess engine coolant from engine.
FLUSHING COOLING SYSTEM
1. Fill radiator with water until water spills from the air relief hole, then close air relief plug. Fill radiator and
reservoir tank with water and reinstall radiator cap.
2. Run engine and warm it up to normal operating temperature.
3. Rev engine two or three times under no-load.
4. Stop engine and wait until it cools down.
5. Drain water from the system. Refer to CO-11, "
DRAINING ENGINE COOLANT" .
6. Repeat steps 1 through 5 until clear water begins to drain from radiator.

RADIATOR
CO-15
[VQ35DE]
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8. Rotate two radiator upper mount brackets 90 degrees in the
direction shown in the figure, and remove them.
9. Lift up and remove radiator.
CAUTION:
Do not damage or scratch air conditioner condenser and
radiator core when removing.
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-11, "
CHECKING COOLING SYSTEM FOR
LEAKS" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant and A/T fluid.
Checking Radiator CapABS008FW
1. Pull radiator cap negative-pressure valve to open it, and make
sure it close completely when released.

Make sure there is no dirt or damage on valve seat of radiator
cap negative-pressure valve.

Make sure there are no unusualness in the opening and clos-
ing conditions of radiator cap negative-pressure valve.
2. Check radiator cap relief pressure.

When connecting radiator cap to radiator cap tester adapter
(SST) and radiator cap tester (commercial service tool), apply
engine coolant to the cap seal part.

Replace radiator cap if there is an unusualness in radiator cap
negative-pressure valve, or if the open-valve pressure is out-
side of the standard values.
SBIA0447E
SBIA0448E
SMA967B
Standard
: 78 - 98 kPa (0.8 - 1.0 kg/cm
2 , 11 - 14 psi)
Limit
: 59 kPa (0.6 kg/cm
2 , 9 psi)
SLC755A