2007 INFINITI M35 engine cover

EI-18
COWL TOP
Revision: 2007 April2007 M35/M45
COWL TOPPFP:66100
Removal and InstallationNIS0024I
REMOVAL
1. Remove front wiper arm (LH/RH) from vehicle. Refer to WW-43, "Removal and Installation of Front Wiper
Arms, Adjustment of Wiper Arms Stop Location" .
2. Remove engine room cover (LH/RH), battery cover and brake master cylinder cover. Refer to EM-15,
"ENGINE ROOM COVER" (VQ35 engine model), EM-173, "ENGINE ROOM COVER" (VK45 engine
model).
3. Remove cowl top seal rubber.
4. Remove cowl top cover mounting clips (LH/RH).
5. Plastic pawl A is pull up and cowl top cover RH (2) is removed
ahead of vehicles.
6. Plastic pawl B is push down and cowl top cover LH (1) is
removed ahead of vehicles.
INSTALLATION
Note the following, and install in the reverse order of removal.

Install cowl top cover LH (1) with C (pin from front windshield
glass) aligned with concave part.
1. Cowl top cover (LH) 2. Cowl top cover (RH) 3. Cowl top seal rubber
PIIB5075E
PIIB5077E
PIIB5078E

FLOOR SIDE FAIRING
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Revision: 2007 April2007 M35/M45
FLOOR SIDE FAIRINGPFP:74586
Removal and Installation of Under Cover (for V6 Engine Models)NIS0024M
Removal and Installation of Under Cover (for V8 Engine Models)NIS0024N
FRONT UNDER COVER
Removal
1. Remove front under cover mounting bolts and clip.
2. Remove front under cover.
Installation
Install in the reverse order of removal.
1. Front under cover 2. Front under cover (rear) 3. Floor under cover (RH)
4. Floor under cover (LH) 5. Rear under cover (RH) 6. Rear under cover (LH)
7. Rear diffuser
PIIB6282E
1. Front under cover 2. Front under cover (rear) 3. Floor under cover (RH)
4. Floor under cover (LH) 5. Rear under cover (RH) 6. Rear under cover (LH)
7. Rear diffuser
PIIB6283E

FUEL SYSTEM
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Revision: 2007 April2007 M35/M45
FUEL SYSTEMPFP:17503
Checking Fuel LinesNBS005R8
Inspect fuel lines, fuel filler cap and fuel tank for improper attach-
ment, leaks, cracks, damage, loose connections, chafing or deterio-
ration.
If necessary, repair or replace damaged parts.
General PrecautionsNBS005R9
WARNING:
When replacing fuel line parts, be sure to observe the following.

Put a “CAUTION: FLAMMABLE” sign in the workshop.

Be sure to work in a well ventilated area and furnish workshop with a CO2 fire extinguisher.

Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
CAUTION:

Use gasoline required by the regulations for octane number. Refer to GI-6, "Precautions for Fuel
(Unleaded Premium Gasoline Required) (VK45DE Engine Models)" .

Before removing fuel line parts, perform out the following procedures:
–Put drained fuel in an explosion-proof container and put the lid on securely. Keep the container in
safe area.
–Release fuel pressure from the fuel lines. Refer to EC-88, "FUEL PRESSURE RELEASE" (VQ35DE)
or EC-790, "
FUEL PRESSURE RELEASE" (VK45DE).
–Disconnect the battery cable from the negative terminal.

Always replace O-ring and clamps with new ones.

Do not kink or twist tubes when they are being installed.

Do not tighten hose clamps excessively to avoid damaging hoses.

After connecting fuel tube quick connectors, make sure
quick connectors are secure.
Ensure that connector and resin tube do not contact any
adjacent parts.

After installing tubes, make sure there is no fuel leakage at
connections in the following steps.
–Apply fuel pressure to fuel lines with turning ignition switch
“ON” (with engine stopped). Then check for fuel leaks at
connections.
–Start engine and rev it up and check for fuel leaks at con-
nections.

Use only a genuine NISSAN fuel filler cap as a replacement.
If an incorrect fuel filler cap is used, the “MIL” may come
on.

For servicing “Evaporative Emission System” parts, refer to
EC-39, "
EVAPORATIVE EMISSION SYSTEM" (VQ35DE) or
EC-741, "
EVAPORATIVE EMISSION SYSTEM" (VK45DE).

For servicing“On Board Refueling Vapor Recovery (ORVR)”
parts, refer to EC-46, "
ON BOARD REFUELING VAPOR
RECOVERY (ORVR)" (VQ35DE) or EC-748, "ON BOARD
REFUELING VAPOR RECOVERY (ORVR)" (VK45DE).
SMA803A
SBIA0504E

FRONT SUSPENSION ASSEMBLY
FSU-9
[2WD]
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Revision: 2007 April2007 M35/M45
.
Removal and Installation NES000ID
REMOVAL
1. For VK45DE engine models, disconnect related electric wires and hoses from engine assembly to remove
front suspension member with engine assembly. Refer to EM-247, "
ENGINE ASSEMBLY" .
2. Remove cowl top panel and hood. Refer to EI-18, "
COWL TOP" , EI-17, "HOOD" .
3. For VQ35DE engine models, install engine slinger, and then hoist engine. Refer to EM-114, "
Removal and
Installation (2WD Models)" .
4. Remove tires from vehicle with a power tool.
5. Remove wheel sensor from steering knuckle. Refer to BRC-54, "
WHEEL SENSOR" .
CAUTION:
Do not pull on wheel sensor harness.
6. Remove brake hose bracket. Refer to BR-11, "
BRAKE TUBE AND HOSE" .
7. Remove undercover with a power tool.
8. Remove cotter pin (1), and then loosen the nut.
9. Remove steering outer socket (2) from steering knuckle (3) so
as not to damage ball joint boot (4) using the ball joint remover
(suitable tool).
CAUTION:
Temporarily tighten the nut to prevent damage to threads
and to prevent the ball joint remover (suitable tool) from
suddenly coming off.
10. Remove the mounting nut on the upper side of stabilizer con-
necting rod with a power tool, and then remove stabilizer con-
necting rod from transverse link.
11. Separate steering gear assembly and lower joint. Refer to PS-13, "
STEERING COLUMN" .
12. Remove rack stay. Refer to FSU-8, "
Components" .
13. Remove steering hydraulic piping bracket from front suspension member. Refer to PS-39, "
HYDRAULIC
LINE" .
14. Remove the mounting nut and bolt on the lower side of shock absorber with a power tool, and then
remove shock absorber from transverse link.
15. Remove cotter pin of transverse link and steering knuckle, and then loosen nut.
16. Set jack under front suspension member.
17. Remove transverse link from steering knuckle so as not to damage ball joint boot using the ball joint
remover (suitable tool)
CAUTION:
Temporarily tighten the nut to prevent damage to threads and to prevent ball joint remover (suit-
able tool) from suddenly coming off.
18. Remove the mounting nuts of engine mounting insulator. Refer to EM-114, "
ENGINE ASSEMBLY" .
19. Remove the mounting bolts of member bracket, and then remove member bracket from front suspension
member with a power tool. Refer to FSU-8, "
Components" .
20. Remove the mounting nut and bolts of member stay, and then remove member stay from front suspension
member and vehicle with a power tool.
21. Remove the mounting nut of front suspension member with a power tool. Refer to FSU-8, "
Components" .
1. Shock absorber mounting bracket 2. Bound bumper 3. Rubber seat
4. Coil spring 5. Shock absorber 6. Upper link
7. Steering knuckle 8. Transverse link 9. Washer
10. Steering stopper bracket 11. Stabilizer connecting rod 12. Stabilizer bar
13. Stabilizer bushing 14. Stabilizer clamp 15. Front suspension member
16. Rack stay 17. Member stay 18. Member bracket
19. Clamp 20. Cotter pin 21. Stopper rubber
Refer to GI-11, "
Components" , for the symbols in the figure.
SGIA1183E

FRONT SUSPENSION ASSEMBLY
FSU-27
[AWD]
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Revision: 2007 April2007 M35/M45
Removal and Installation NES000IT
REMOVAL
1. Remove cowl top panel and hood. Refer to EI-18, "COWL TOP" , EI-17, "HOOD" .
2. Install engine slinger, and then hoist engine. Refer to EM-119, "
Removal and Installation (AWD Models)" .
3. Remove tires from vehicle with a power tool.
4. Remove wheel sensor from steering knuckle. Refer to BRC-54, "
WHEEL SENSOR" .
CAUTION:
Do not pull on wheel sensor harness.
5. Remove brake hose bracket. Refer to BR-11, "
BRAKE TUBE AND HOSE" .
6. Remove undercover with a power tool.
7. Remove cotter pin (1), and then loosen the nut.
8. Remove steering outer socket (2) from steering knuckle (3) so
as not to damage ball joint boot (4) using the ball joint remover
(suitable tool).
CAUTION:
Temporarily tighten the nut to prevent damage to threads
and to prevent the ball joint remover (suitable tool) from
suddenly coming off.
9. Remove the mounting nut on the upper side of stabilizer con-
necting rod with a power tool, and then remove stabilizer con-
necting rod from transverse link.
10. Separate steering gear assembly and lower joint. Refer to PS-13, "
STEERING COLUMN" .
11. Remove front cross bar. Refer to FSU-26, "
Components" .
12. Remove steering hydraulic piping bracket from front suspension member. Refer to PS-39, "
HYDRAULIC
LINE" .
13. Remove the mounting nut and bolt on the lower side of shock absorber arm with a power tool, and then
remove shock absorber arm from transverse link.
14. Remove cotter pin of transverse link and steering knuckle, and then loosen nut.
15. Remove transverse link from steering knuckle so as not to damage ball joint boot using the ball joint
remover (suitable tool).
CAUTION:
Temporarily tighten the nut to prevent damage to threads and to prevent ball joint remover (suit-
able tool) from suddenly coming off.
16. Set jack under front suspension member.
17. Remove the mounting nuts of engine mounting insulator. Refer to EM-114, "
ENGINE ASSEMBLY" .
18. Remove the mounting bolts of member bracket, and then remove member bracket from front suspension
member with a power tool. Refer to FSU-26, "
Components" .
19. Remove the mounting nuts of front suspension member with a power tool. Refer to FSU-26, "
Compo-
nents" .
20. Gradually lower a jack to remove front suspension assembly from vehicle.
1. Shock absorber mounting bracket 2. Bound bumper 3. Rubber seat
4. Coil spring 5. Shock absorber 6. Shock absorber arm
7. Upper link 8. Steering knuckle 9. Transverse link
10. Steering stopper bracket 11. Washer 12. Stabilizer connecting rod
13. Stabilizer bar 14. Stabilizer bushing 15. Stabilizer clamp
16. Front suspension member 17. Front cross bar 18. Member bracket
19. Clamp 20. Cotter pin 21. Stopper rubber
Refer to GI-11, "
Components" , for the symbols in the figure.
SGIA1183E

GI-1
GENERAL INFORMATION
A GENERAL INFORMATION
CONTENTS
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SECTION GI
Revision: 2007 April2007 M35/M45
Revision: 2007 AprilGENERAL INFORMATION
PRECAUTIONS .......................................................... 3
Description ............................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions Necessary for Steering Wheel Rotation
after Battery Disconnect ........................................... 3
OPERATION PROCEDURE ................................. 3
Precautions for Procedures without Cowl Top Cover ..... 4
General Precautions ................................................ 4
Precautions for Three Way Catalyst ......................... 5
Precautions for Fuel (Unleaded Premium Gasoline
Recommended) (VQ35DE Engine Models) ............. 6
Precautions for Fuel (Unleaded Premium Gasoline
Required) (VK45DE Engine Models) ....................... 6
Precautions for Multiport Fuel Injection System or
Engine Control System ............................................ 6
Precautions for Hoses .............................................. 7
HOSE REMOVAL AND INSTALLATION ............... 7
HOSE CLAMPING ................................................ 7
Precautions for Engine Oils ...................................... 7
HEALTH PROTECTION PRECAUTIONS ............. 7
Precautions for the Environment .............................. 8
Precautions for Air Conditioning ............................... 8
HOW TO USE THIS MANUAL ................................... 9
Description ............................................................... 9
Terms ....................................................................... 9
Units ......................................................................... 9
Contents ................................................................... 9
Relation between Illustrations and Descriptions .... 10
Components ............................................................ 11
SYMBOLS ............................................................ 11
How to Follow Trouble Diagnoses .......................... 12
DESCRIPTION .................................................... 12
HOW TO FOLLOW TEST GROUPS IN TROU-
BLE DIAGNOSES ............................................... 12
HARNESS WIRE COLOR AND CONNECTOR
NUMBER INDICATION ....................................... 13
KEY TO SYMBOLS SIGNIFYING MEASURE-
MENTS OR PROCEDURES ............................... 14How to Read Wiring Diagrams ............................... 16
CONNECTOR SYMBOLS ................................... 16
SAMPLE/WIRING DIAGRAM - EXAMPL - .......... 17
DESCRIPTION .................................................... 18
Abbreviations .......................................................... 24
SERVICE INFORMATION FOR ELECTRICAL INCI-
DENT ......................................................................... 25
How to Check Terminal ........................................... 25
CONNECTOR AND TERMINAL PIN KIT ............ 25
HOW TO PROBE CONNECTORS ...................... 25
How to Perform Efficient Diagnosis for an Electrical
Incident ................................................................... 28
WORK FLOW ...................................................... 28
INCIDENT SIMULATION TESTS ........................ 28
CIRCUIT INSPECTION ....................................... 31
Control Units and Electrical Parts ........................... 36
PRECAUTIONS .................................................. 36
CONSULT-II CHECKING SYSTEM .......................... 37
Description .............................................................. 37
Function and System Application ........................... 37
Nickel Metal Hydride Battery Replacement ............ 38
Checking Equipment .............................................. 38
CONSULT-II Start Procedure .................................. 38
CONSULT-II Data Link Connector (DLC) Circuit .... 39
INSPECTION PROCEDURE .............................. 39
CIRCUIT DIAGRAM ............................................ 40
LIFTING POINT ......................................................... 41
Commercial Service Tools ...................................... 41
Garage Jack and Safety Stand and 2-Pole Lift ....... 41
Board-On Lift .......................................................... 42
TOW TRUCK TOWING ............................................. 43
Tow Truck Towing ................................................... 43
2WD MODELS .................................................... 43
AWD MODELS .................................................... 44
Vehicle Recovery (Freeing a Stuck Vehicle) ........... 44
FRONT ................................................................ 44
REAR .................................................................. 44
AUTOMATIC TRANSMISSION ........................... 45
TIGHTENING TORQUE OF STANDARD BOLTS .... 46
Tightening Torque Table ......................................... 46

GI-4
PRECAUTIONS
Revision: 2007 April2007 M35/M45
Precautions for Procedures without Cowl Top CoverNAS0009E
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
General PrecautionsNAS0009F

Do not operate the engine for an extended period of time without
proper exhaust ventilation.
Keep the work area well ventilated and free of any flammable
materials. Special care should be taken when handling any flam-
mable or poisonous materials, such as gasoline, refrigerant gas,
etc. When working in a pit or other enclosed area, be sure to
properly ventilate the area before working with hazardous mate-
rials.
Do not smoke while working on the vehicle.

Before jacking up the vehicle, apply wheel chocks or other tire
blocks to the wheels to prevent the vehicle from moving. After
jacking up the vehicle, support the vehicle weight with safety
stands at the points designated for proper lifting before working
on the vehicle.
These operations should be done on a level surface.

When removing a heavy component such as the engine or tran-
saxle/transmission, be careful not to lose your balance and drop
them. Also, do not allow them to strike adjacent parts, especially
the brake tubes and master cylinder.

Before starting repairs which do not require battery power:
Turn off ignition switch.
Disconnect the negative battery terminal.

If the battery terminals are disconnected, recorded memory of
radio and each control unit is erased.

Battery posts, terminals and related accessories contain lead
and lead compounds. Wash hands after handling.
PIIB3706J
SGI285
SGI231
SEF289H

GI-6
PRECAUTIONS
Revision: 2007 April2007 M35/M45

Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to
the catalyst.
Do not place the vehicle on flammable material. Keep flammable material off the exhaust pipe and the three
way catalyst.
Precautions for Fuel (Unleaded Premium Gasoline Recommended) (VQ35DE
Engine Models)
NAS0009H
INFINITY recommends the use of unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-
Knock Index) number (Research octane number 96).
If unleaded premium gasoline is not available, you may use unleaded regular gasoline with an octane rating of
at least 87 AKI number (Research octane number 91), but you may notice a decrease in performance.
CAUTION:
Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Do not use E-85
fuel (85%fuel ethanol, 15% unleaded gasoline) unless the vehicle is specifically designed for E-85 fuel
(i.e. Flexible Fuel Vehicle - FFV models). Using a fuel other than that specified could adversely affect
the emission control devices and systems, and could also affect the warranty coverage validity.
Precautions for Fuel (Unleaded Premium Gasoline Required) (VK45DE Engine
Models)
NAS0009I
Use unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-Knock Index) number (Research
octane number 96).
If unleaded premium gasoline is not available, unleaded regular gasoline with an octane rating of at least 87
AKI number (Research octane number 91) can be used, but only under the following precautions:

Have the fuel tank filled only partially with unleaded regular gasoline, and fill up with unleaded premium
gasoline as soon as possible.

Avoid full throttle driving and abrupt acceleration.
However, for maximum vehicle performance, the use of unleaded premium gasoline is recommended.
CAUTION:
Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Do not use E-85
fuel (85%fuel ethanol, 15% unleaded gasoline) unless the vehicle is specifically designed for E-85 fuel
(i.e. Flexible Fuel Vehicle - FFV models). Using a fuel other than that specified could adversely affect
the emission control devices and systems, and could also affect the warranty coverage validity.
Precautions for Multiport Fuel Injection System or Engine Control SystemNAS0009J

Before connecting or disconnecting any harness connector for
the multiport fuel injection system or ECM:
Turn ignition switch to “OFF” position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.

Before disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.

Be careful not to jar components such as ECM and mass air
flow sensor.
SGI787