check INFINITI M35 2006 Factory Service Manual

TROUBLE DIAGNOSIS
BRC-53
[VDC/TCS/ABS]
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Revision: 2006 January2006 M35/M45
2. CHECK PARKING BRAKE SWITCH HARNESS
1. Disconnect ABS actuator and electric unit (control unit) connector E30.
2. Check continuity between parking brake switch connector E110
and ABS actuator and electric unit (control unit) connector E30.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace malfunctioning components.
Inspection 19: Warning Lamp and Indicator Lamp CircuitNFS000R3
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK >> GO TO 2.
NG >> Check items displayed by self-diagnosis. Refer to BRC-24, "
DISPLAY ITEM LIST" .
2. CHECK COMBINATION METER
Check the indication and operation of combination meter are normal. Refer to DI-17, "
Self-Diagnosis Mode of
Combination Meter" .
OK or NG
OK >> INSPECTION END
NG >> Combination meter is malfunctioning. Repair or replace combination meter. Refer to DI-5, "
COM-
BINATION METERS" .
Symptom 1 Excessive ABS Function Operation FrequencyNFS000R4
1. CHECK START
Check front and rear brake force distribution using a brake tester. Refer to BR-35, "
SERVICE DATA AND
SPECIFICATIONS (SDS)" .
OK or NG
OK >> GO TO 2.
NG >> Check brake system.
SFIA3048E
ABS actuator and electric unit (control unit) Parking brake switch Continuity
361Yes
Ground No

BRC-54
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
2. CHECK FRONT AND REAR AXLE
Make sure that there is no excessive play in the front and rear axles. Refer to front: FAX-5, "
WHEEL BEAR-
ING INSPECTION" , Rear: RAX-5, "WHEEL BEARING INSPECTION" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace malfunctioning components.
3. CHECK WHEEL SENSOR AND SENSOR ROTOR
Check the following.
Wheel sensor installation for damage.
Sensor rotor installation for damage.
Wheel sensor connector connection.
Wheel sensor harness inspection.
OK or NG
OK >> GO TO 4.
NG >>
Replace wheel sensor or sensor rotor.
Repair harness.
4. CHECK ABS WARNING LAMP DISPLAY
Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving.
OK or NG
OK >> Normal
NG >> Perform self-diagnosis. Refer to BRC-23, "
Self-Diagnosis" .
Symptom 2 Unexpected Pedal ReactionNFS000R5
1. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke. Refer to BR-6, "
Inspection and Adjustment" .
Is the stroke too big?
YES >>Bleed air from brake tube and hose. Refer to BR-11, "Bleeding Brake System" .
Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake sys-
tem fluid leakage, etc. Refer to brake pedal: BR-7, "
COMPONENTS" , brake booster and mas-
ter cylinder: BR-19, "
COMPONENTS" .
NO >> GO TO 2.
2. CHECK FUNCTION
Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is
normal in this condition.Connect connector after inspection.
OK or NG
OK >> GO TO procedure 3 “CHECK WHEEL SENSOR AND SENSOR ROTOR” of symptom 1. Refer to
BRC-53, "
Symptom 1 Excessive ABS Function Operation Frequency" .
NG >> Check brake system.

TROUBLE DIAGNOSIS
BRC-55
[VDC/TCS/ABS]
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Revision: 2006 January2006 M35/M45
Symptom 3 The Braking Distance Is LongNFS000R6
CAUTION:
The stopping distance on slippery road surfaces might be longer with the ABS operating than when
the ABS is not operating.
1. CHECK FUNCTION
Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector to deactivate
ABS. In this condition, check stopping distance. After inspection, connect connector.
OK or NG
OK >> GO TO procedure 3 “CHECK WHEEL SENSOR AND SENSOR ROTOR” of symptom 1. Refer to
BRC-53, "
Symptom 1 Excessive ABS Function Operation Frequency" .
NG >> Check brake system.
Symptom 4 ABS Function Does Not OperateNFS000R7
CAUTION:
ABS does not operate when speed is 10 km/h (6 MPH) or lower.
1. CHECK ABS WARNING LAMP DISPLAY
Make sure that the ABS warning lamp turns OFF after ignition switch is turned on or when driving.
OK or NG
OK >> GO TO procedure 3 “CHECK WHEEL SENSOR AND SENSOR ROTOR” of symptom 1. Refer to
BRC-53, "
Symptom 1 Excessive ABS Function Operation Frequency" .
NG >> Perform self-diagnosis. Refer to BRC-23, "
Self-Diagnosis" .
Symptom 5 Pedal Vibration or ABS Operation Sound OccursNFS000R8
CAUTION:
Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly
depressed (just place a foot on it).However, this is normal.
When shifting gears
When driving on slippery road
During cornering at high speed
When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more]
When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher]
1. SYMPTOM CHECK 1
Check if there is pedal vibration or operation sound when the engine is started.
Do symptoms occur?
YES >> GO TO 2.
NO >> Perform self -diagnosis. Refer to BRC-23, "
Self-Diagnosis" .
2. SYMPTOM CHECK 2
Check symptoms when electrical component (headlamps, etc.) switches are operated.
Do symptoms occur?
YES >> Check if there is a radio, antenna, antenna lead wire, or wiring close to the control unit. If there is,
move it farther away.
NO >> GO TO procedure 3 “CHECK WHEEL SENSOR AND SENSOR ROTOR” of symptom 1. Refer to
BRC-53, "
Symptom 1 Excessive ABS Function Operation Frequency" .

BRC-56
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Symptom 6 Vehicle Jerks During VDC/TCS/ABS ControlNFS000R9
1. SYMPTOM CHECK
Check if the vehicle jerks during VDC/TCS/ABS control.
OK or NG
OK >> Normal.
NG >> GO TO 2.
2. CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnostic of ABS actuator and electric unit (control unit).
Are self-diagnosis results indicated?
YES >> Check corresponding items, make repairs, and perform ABS actuator and electric unit (control
unit) self-diagnosis.
NO >> GO TO 3.
3. CHECK CONNECTOR
Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector and check
terminal for deformation, disconnection, looseness, etc.
Securely connect connectors and perform ABS actuator and electric unit (control unit) self-diagnosis.
Are self-diagnosis results indicated?
YES >> If poor contact, damage, open or short circuit of connector terminal is found, repair or replace.
NO >> GO TO 4.
4. CHECK ECM AND A/T SELF-DIAGNOSIS RESULTS
Perform ECM and A/T self-diagnosis.
Are self-diagnosis results indicated?
YES >> Check the corresponding items.
ECM: Refer to EC-100, "TROUBLE DIAGNOSIS" (VQ35DE), EC-811, "TROUBLE DIAGNO-
SIS" (VK45DE).
A/T: Refer to AT-44, "TROUBLE DIAGNOSIS" .
NO >> Replace ABS actuator and electric unit (control unit).

CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION CO
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CO
Revision: 2006 January2006 M35/M45
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 Chart ......................................................... 10
ENGINE COOLANT ...................................................11
Inspection ................................................................ 11
LEVEL CHECK .................................................... 11
LEAK CHECK ...................................................... 11
Changing Engine Coolant ....................................... 11
DRAINING ENGINE COOLANT .......................... 11
REFILLING ENGINE COOLANT ........................ 12
FLUSHING COOLING SYSTEM ......................... 13
RADIATOR ................................................................ 14
Components ........................................................... 14
Removal and Installation ........................................ 14
REMOVAL ........................................................
... 14
INSTALLATION ................................................... 16
INSPECTION AFTER INSTALLATION ............... 16
Checking Radiator Cap .......................................... 16
Checking Radiator .................................................. 16
RADIATOR (ALUMINUM TYPE) .............................. 18
Components ........................................................... 18
Disassembly and Assembly ................................... 18
PREPARATION ................................................... 18
DISASSEMBLY ................................................... 18
ASSEMBLY ......................................................... 19
INSPECTION ...................................................... 21COOLING FAN .......................................................... 22
Components ........................................................... 22
Removal and Installation ........................................ 22
REMOVAL ........................................................
... 22
INSTALLATION ................................................... 22
INSPECTION AFTER INSTALLATION ................ 22
Disassembly and Assembly .................................... 23
DISASSEMBLY ................................................... 23
INSPECTION AFTER DISASSEMBLY ................ 23
ASSEMBLY ......................................................... 23
WATER PUMP .......................................................... 24
Components ........................................................... 24
Removal and Installation ........................................ 24
REMOVAL ........................................................
... 24
INSPECTION AFTER REMOVAL ....................... 26
INSTALLATION ................................................... 26
INSPECTION AFTER INSTALLATION ................ 28
WATER INLET AND THERMOSTAT ASSEMBLY .... 29
Components ........................................................... 29
Removal and Installation ........................................ 29
REMOVAL ........................................................
... 29
INSPECTION AFTER REMOVAL ....................... 30
INSTALLATION ................................................... 30
INSPECTION AFTER INSTALLATION ................ 30
WATER OUTLET AND WATER PIPING ................... 31
Components ........................................................... 31
Removal and Installation ........................................ 31
REMOVAL ........................................................
... 31
INSTALLATION ................................................... 32
INSPECTION AFTER INSTALLATION ................ 32
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 33
Standard and Limit .................................................. 33
ENGINE COOLANT CAPACITY (APPROXI-
MATE) .................................................................. 33
RADIATOR .......................................................
... 33
THERMOSTAT .................................................... 33

CO-2Revision: 2006 January2006 M35/M45
VK45DE
PRECAUTIONS ......................................................... 34
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................. 34
PREPARATION ......................................................... 35
Special Service Tools ............................................. 35
Commercial Service Tools ...................................... 35
OVERHEATING CAUSE ANALYSIS ........................ 36
Troubleshooting Chart ............................................ 36
COOLING SYSTEM .................................................. 38
Cooling Circuit ........................................................ 38
System Chart .......................................................... 39
ENGINE COOLANT .................................................. 40
Inspection ............................................................... 40
LEVEL CHECK .................................................... 40
LEAK CHECK ...................................................... 40
Changing Engine Coolant ....................................... 40
DRAINING ENGINE COOLANT .......................... 40
REFILLING ENGINE COOLANT ......................... 41
FLUSHING COOLING SYSTEM ......................... 42
RADIATOR ................................................................ 43
Components ........................................................... 43
Removal and Installation ........................................ 43
REMOVAL ........................................................
... 43
INSTALLATION .................................................... 45
INSPECTION AFTER INSTALLATION ................ 45
Checking Radiator Cap .......................................... 45
Checking Radiator .................................................. 45
RADIATOR (ALUMINUM TYPE) ............................... 47
Components ........................................................... 47
Disassembly and Assembly .................................... 47
PREPARATION ................................................... 47
DISASSEMBLY ................................................... 47
ASSEMBLY ......................................................... 48
INSPECTION ....................................................... 50COOLING FAN .......................................................... 51
Components ............................................................ 51
Removal and Installation ......................................... 51
REMOVAL ............................................................ 51
INSTALLATION .................................................... 51
INSPECTION AFTER INSTALLATION ................ 51
Disassembly and Assembly .................................... 52
DISASSEMBLY .................................................... 52
INSPECTION AFTER DISASSEMBLY ................ 52
ASSEMBLY .......................................................... 52
WATER PUMP ........................................................... 53
Components ............................................................ 53
Removal and Installation ......................................... 53
REMOVAL ............................................................ 53
INSPECTION AFTER REMOVAL ........................ 54
INSTALLATION .................................................... 54
INSPECTION AFTER INSTALLATION ................ 54
THERMOSTAT AND WATER CONTROL VALVE ..... 55
Components ............................................................ 55
Removal and Installation ......................................... 55
REMOVAL ............................................................ 55
INSPECTION AFTER REMOVAL ........................ 56
INSTALLATION .................................................... 56
INSPECTION AFTER INSTALLATION ................ 57
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 58
Standard and Limit .................................................. 58
ENGINE COOLANT CAPACITY (APPROXI-
MATE) .................................................................. 58
RADIATOR ........................................................... 58
THERMOSTAT ..................................................... 58
WATER CONTROL VALVE .................................. 58

CO-6
[VQ35DE]
PREPARATION
Revision: 2006 January2006 M35/M45
Commercial Service ToolsNBS004QM
Tool nameDescription
Power toolLoosening nuts and bolts
Radiator cap tester Checking radiator and radiator cap
PBIC0190E
PBIC1982E

OVERHEATING CAUSE ANALYSIS
CO-7
[VQ35DE]
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Revision: 2006 January2006 M35/M45
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartNBS004QN
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: 2006 January2006 M35/M45
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
InspectionNBS004QQ
LEVEL CHECK
Check if the reservoir tank engine coolant level is within the
“MIN” to “MAX” when the engine is cool.
Adjust the engine coolant level as necessary.
LEAK CHECK
To check for leaks, apply pressure to the cooling system with the
radiator cap tester (commercial service tool) and radiator cap
tester adapter (SST).
WAR NING :
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 CoolantNBS004QR
WAR NING :
To avoid being scalded, do not change engine coolant when the engine is hot.
Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn radiator cap a
quarter of a turn to release built-up pressure. Then turn radiator cap all the way.
DRAINING ENGINE COOLANT
1. Remove engine room cover (RH and LH). Refer to EM-14, "ENGINE ROOM COVER" .
2. Remove air duct (inlet). Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
3. Open radiator drain plug at the bottom of radiator, and then remove radiator cap.
When draining all of engine coolant in the system, open water drain plugs on cylinder block. Refer
to EM-124, "
DISASSEMBLY" .
SMA412B
Testing pressure
: 157 kPa (1.6 kg/cm
2 , 23 psi)
SLC756A
1 : Radiator drain plug hole
2 : Front engine under cover
: Engine front
PBIC3395E