2007 INFINITI M35 power steering system

RSU-8
REAR SUSPENSION ASSEMBLY
Revision: 2007 April2007 M35/M45
Removal and InstallationNES000J9
REMOVAL
1. Remove tires with a power tool.
2. Remove brake caliper with a power tool. Hang it in a place where it will not interfere with work. Refer to
BR-28, "
REAR DISC BRAKE" .
CAUTION:
Do not depressing brake pedal while brake caliper is removed.
3. Put matching marks on both disc rotor and the wheel hub and
bearing assembly, then remove disc rotor.
4. Remove rear under cover.
5. Remove wheel sensor from rear final drive.
6. Remove harness from rear final drive and rear suspension
member.
7. Remove center muffler. Refer to EX-3, "
EXHAUST SYSTEM" .
8. Remove rear propeller shaft. Refer to PR-6, "
REAR PROPEL-
LER SHAFT" .
9. Remove stabilizer bar. Refer to RSU-17, "
STABILIZER BAR" .
10. Remove parking brake cable mounting bolt and separate park-
ing brake cable from vehicle and rear suspension member. Refer to PB-4, "
PARKING BRAKE CONTROL"
.
11. Remove rear lower link and coil spring. Refer to RSU-16, "
REAR LOWER LINK & COIL SPRING" .
12. Remove mounting bolt on lower side of shock absorber. Refer to RSU-10, "
SHOCK ABSORBER" .
13. Set jack under rear final drive.
14. Remove member stay from vehicle.
15. Remove rear pin stay mounting bolts and nuts.
16. Gradually lowering jack, remove rear pin stay and rear suspension assembly.
INSTALLATION

Installation is the reverse order of the removal. For tightening torque, refer to RSU-7, "Components" .
CAUTION:
Do not reuse non-reusable parts.

Assemble disc rotor and wheel hub and bearing assembly by
aligning each matching mark as shown in the figure when install-
ing disc rotor.

Perform the final tightening of each of parts under unladen con-
ditions, which were removed when removing rear suspension
assembly. Check the wheel alignment. Refer to RSU-5, "
Wheel
Alignment Inspection" .

Adjust neutral position of steering angle sensor after checking
the wheel alignment. Refer to BRC-6, "
Adjustment of Steering
Angle Sensor Neutral Position" .

Check for the following after finishing work.
1. Washer 2. Mounting seal 3. Bushing (upper side)
4. Distance tube 5. Mounting bracket 6. Bushing (lower side)
7. Bound bumper cover 8. Bound bumper 9. Shock absorber
10. Axle assembly 11. Upper seat 12. Coil spring
13. Ball seat 14. Rubber seat 15. Cotter pin
16. Suspension arm 17. Connecting rod mounting bracket 18. Connecting rod
19. Mount stopper 20. Rear lower link 21. Front lower link
22. Radius rod 23. Stabilizer Bushing 24. Stabilizer Clamp
25. Stabilizer bar 26. Rear suspension member 27. Member stay
28. Stopper rubber 29. Cap 30. Rear pin stay
Refer to GI-11, "
Components" , for to the symbols in the figure.
SDIA2638E
SDIA2638E

CHARGING SYSTEM
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Revision: 2007 April2007 M35/M45
Removal and Installation NKS005C0
VQ35DE ENGINE MODELS
Removal (2WD Models)
1. Disconnect the battery cable from the negative terminal.
2. Remove engine front undercover, using power tools.
3. Remove alternator and power steering oil pump belt. Refer to EM-16, "
DRIVE BELTS" .
4. Disconnect alternator connector (1).
5. Remove “B” terminal nut (2).
6. Remove the harness bracket bolts (A).
7. Remove oil pressure switch harness clip (A) from alternator stay.
8. Disconnect oil pressure switch connector (1).
9. Remove alternator mounting bolt (B) and alternator stay mount-
ing bolt (C) using power tools, then remove alternator stay (2).
10. Remove alternator mounting bolt (D), using power tools.
11. Remove alternator assembly downward from the vehicle.
1. “B” terminal nut 2. “B” terminal harness 3. Alternator connector
4. Alternator mounting bolt 5. Alternator stay mounting bolt 6. Alternator stay
7. Alternator : N·m (kg-m, ft-lb) : Engine front
PKIB8815E
SKIB2605J
PKIB8817E

SC-32
CHARGING SYSTEM
Revision: 2007 April2007 M35/M45
Removal (AWD Models)
1. Disconnect the battery cable from the negative terminal.
2. Remove power steering oil reservoir tank from the bracket.
3. Remove the clips (A) and the hose clamp (B) from the harness
bracket (1).
4. Remove engine front undercover, using power tools.
5. Remove alternator and power steering oil pump belt. Refer to
EM-16, "
DRIVE BELTS" .
6. Remove alternator mounting bolt (A) and alternator stay mount-
ing bolt (B) using power tools, then remove alternator stay (1).
7. Remove alternator mounting bolt (C), using power tools.
8. Pull and turn alternator, and then remove the harness bracket
bolts (A).
9. Disconnect alternator connector (1).
10. Remove “B” terminal nut (2).
11. Remove alternator assembly downward from the vehicle.
Alternator Pulley Inspection
Perform the following.

Make sure that alternator pulley does not rattle.

Make sure that alternator pulley nut is tight.
Installation
Installation is the reverse order of removal.
CAUTION:
Be sure to tighten “B” terminal nut carefully.

Install alternator, and check tension of belt. Refer to EM-16, "Checking Drive Belts" .

For this model, the power generation voltage variable control system that controls the power generation
voltage of the alternator has been adopted. Therefore, the power generation voltage variable control sys-
tem operation inspection should be performed after replacing the alternator, and then make sure that the
system operates normally. Refer to SC-29, "
Power Generation Voltage Variable Control System Operation
Inspection" .
PKIB8818E
PKIB8819E
SKIB2608J
Alternator pulley nut:
: 118 N·m (12.0 kg-m, 87 ft-lb)

CHARGING SYSTEM
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Revision: 2007 April2007 M35/M45
VK45DE ENGINE MODELS
Removal
1. Disconnect the battery cable from the negative terminal.
2. Remove engine front undercover, using power tools.
3. Remove “B” terminal nut (1).
4. Disconnect alternator connector (2).
5. Remove alternator ground harness mounting bolt (3).
6. Remove the harness bracket bolts (A).
7. Remove air intake duct. Refer to EM-177, "
AIR CLEANER AND AIR DUCT" .
8. Remove alternator, water pump and A/C compressor belt. Refer to EM-174, "
DRIVE BELTS" .
9. Remove power steering oil reservoir tank (1) from the bracket,
engine coolant reservoir tank (2) and vacuum tank (3).
10. Remove the harness clips (A).
11. Remove alternator mounting bolts (B), using power tools.
12. Remove alternator assembly upward.
1. Alternator ground harness 2. “B” terminal nut 3. “B” terminal harness
4. Alternator nut 5. Alternator bracket 6. Alternator
7. Alternator mounting bolt 8. Alternator stay
: N·m (kg-m, in-lb) : N·m (kg-m, ft-lb) : Engine front
PKIB8812E
PKIB8813E
PKIB8814E

SE-12
AUTOMATIC DRIVE POSITIONER
Revision: 2007 April2007 M35/M45
System DescriptionNIS0025R

The system automatically moves the driver seat, steering and door mirror position by the driver seat con-
trol unit and the automatic drive positioner control unit. The driver seat control unit corresponds with the
automatic drive positioner control unit via UART communication. The driver seat control unit can store the
optimum driving positions (driver seat, steering and door mirror position) for 2 people. If the driver
changes, one-touch operation allows changing to the other driving position.

The driver seat, steering and door mirror position are adjusted automatically to the proper positions for the
driver in different ways: MEMORY OPERATION, EXITING OPERATION, ENTRY OPERATION and
INTELLIGENT KEY INTERLOCK OPERATION.
MANUAL OPERATION
The driving position (seat, steering and door mirror position) can be adjusted with the power seat switch, ADP
steering switch and door mirror control switch.
NOTE:
The door mirrors can be manually operated with the ignition switch in either ACC or ON.
MEMORY OPERATION
The driver seat control unit can store the optimum driving positions (seat, steering and door mirror position) for
2 people. If the front seat position is changed, one-touch (pressing desired memory switch for more than 0.5
second) operation allows changing to the other driving position.
Operation procedure
1. Turn ignition switch ON.
2. Press desired memory switch for 0.5 second. (Indicator LED illuminates.)
3. Driver seat, steering and door mirror will move to the memorized position.
(Indicator LED blinks during adjustment, then illuminates for 5 seconds.)
Operation Condition
If the following conditions are not satisfied, memory switch operation is not performed.

Ignition switch is in ON position.

Driver side power seat switch, ADP steering switch and door mirror control switch are not operated.

Seat memory switch and set switch are not operated.

Output malfunction is not detected.

CAN and UART communications are normal.

A/T selector lever position is in P position.

Detention switch malfunction is not detected.
[Detention switch malfunction is sensed when detention switch remains OFF, vehicle speed is higher than
7 km/H. (4 MPH).]

Input voltage from tilt sensor and telescopic sensor are normal.
NOTE:
The memory operation operates following order.
Function Description
Manual operationThe driving position (seat, steering and door mirror position) can be adjusted with
the power seat switch ADP steering switch or door mirror control switch.
Auto-
matic
operationMemory operation The seat, steering and door mirror move to the stored driving position by pushing
seat memory switch (1 or 2).
Entry/
Exiting
functionExiting operation At exit, the seat moves backward and the steering wheel moves upward.
Entry operationAt entry, the seat and steering wheel returns from exiting position to the previous
driving position before the exiting operation.
Intelligent Key interlock operationPerform memory operation, exiting operation and entry operation by pressing Intel-
ligent Key unlock button.

AUTOMATIC DRIVE POSITIONER
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Revision: 2007 April2007 M35/M45
INTELLIGENT KEY INTERLOCK OPERATION
When pressing unlock button on Intelligent Key or request switch, the system performs memory operation,
exiting operation and entry operation.
Operation procedure
1. Press unlock button on Intelligent Key or request switch.
2. The system performs MEMORY OPERATION, and then performs EXITING OPERATION continually.
NOTE:
If the seat position is in memorized position before push unlock button, MEMORY OPEPATION dose not per-
form.
3. Turn ignition switch ON or close driver side door when ignition switch is in “ACC” position.
4. The system performs ENTRY OPERATION. (Seat and steering positions are moved to memorized posi-
tions. The memorize position is related to key ID.)
Operation Condition
If the following conditions are not satisfied, memory switch operation is not performed.

Ignition switch is in OFF position.

Driver side power seat switch and door mirror control switch are not operated.

Seat memory switch and set switch are not operated.

Output malfunction is not detected.

CAN and UART communications are normal.

A/T selector lever position is in P position.

Detention position switch malfunction is not detected.
[Detention position switch malfunction is sensed when detention switch remains OFF and vehicle speed is
higher than 7 km/h (4 MPH).]
Linking Intelligent Key to the Stored Memory Procedure
NOTE:

If ignition switch turns ON in the middle of memory operation, the system does not perform exiting opera-
tion after memory operation.

If ignition switch turns ON in the middle of exiting operation, entry operation starts at that time.

If entry / exiting operation is cancelled, perform memory operation only.
FAIL-SAFE MODE
If any of the parts move more than a period “T” without any switch operation, MEMORY OPERATION, EXIT-
ING OPERATION, ENTRY OPERATION, INTELLIGENT KEY INTERLOCK OPERATION and the malfunction
part of manual operations are not operated (output malfunction).
Canceling Fail-safe Mode
The mode is cancelled by either of the following operations.

When the selector lever is shifted to P position from any other position (detention switch is turned OFF).
Operated portion T
Seat slidingApprox. 0.1 sec.
Seat recliningApprox. 0.1 sec.
Seat lifter (front)Approx. 0.1 sec.
Seat lifter (rear)Approx. 0.1 sec.
Steering tiltApprox. 0.1 sec.

STC-1
STEERING CONTROL SYSTEM
G STEERING
CONTENTS
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SECTION STC
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STC
Revision: 2007 April2007 M35/M45
STEERING CONTROL SYSTEM
EPS
SYSTEM DESCRIPTION ............................................ 3
Components ............................................................. 3
Components (Models with Rear Active Steer) ......... 3
Electronically Controlled Power Steering System
Function ................................................................... 3
Fail-Safe Function .................................................... 4
FAIL-SAFE INPUT/CANCEL CONDITIONS ......... 4
TROUBLE DIAGNOSIS .............................................. 5
How to Perform Trouble Diagnosis .......................... 5
BASIC CONCEPT ................................................. 5
Component Parts Location ....................................... 5
Wiring Diagram — EPS — ....................................... 6
Control Unit Input/Output Signal Standard ............... 8
STANDARD BY CIRCUIT TESTER AND OSCIL-
LOSCOPE ............................................................. 8
For Fast and Accurate Trouble Diagnosis ................ 9
Basic Inspection ....................................................... 9
POWER SUPPLY CIRCUIT TERMINAL LOOSE-
NESS AND BATTERY .......................................... 9
Inspection: Power Steering Control Unit Power Sup-
ply Circuit and Ground ............................................. 9
Symptom: The Steering Force Does Not Change
Smoothly According to the Vehicle Speed ............. 10
RAS
REAR ACTIVE STEER ............................................. 13
Removal and Installation ........................................ 13
COMPONENTS .................................................. 13
REMOVAL ........................................................... 13
INSTALLATION ................................................... 13
Disassembly and Assembly ................................... 14
COMPONENTS .................................................. 14
DISASSEMBLY ................................................... 14
INSPECTION AFTER DISASSEMBLY ............... 14
ASSEMBLY ......................................................... 14
Neutral Position Adjustment ................................... 14
SYSTEM DESCRIPTION .......................................... 16
Components ........................................................... 16RAS (Rear Active Steer) Function .......................... 16
Fail-Safe Function .................................................. 17
TROUBLE DIAGNOSIS ............................................ 18
How to Perform Trouble Diagnosis ......................... 18
BASIC CONCEPT ............................................... 18
Component Parts Location ..................................... 19
Schematic ............................................................... 20
Wiring Diagram — RAS — ..................................... 21
Control Unit Input/Output Signal Standard ............. 26
CIRCUIT TESTER REFERENCE VALUE ........... 26
STANDARD BY CONSULT-II .............................. 27
CONSULT-II Function (RAS/HICAS) ...................... 27
FUNCTION .......................................................... 27
CONSULT-II SETTING PROCEDURE ................ 28
SELF-DIAG RESULT MODE ............................... 28
DATA MONITOR MODE ...................................... 30
ACTIVE TEST MODE ......................................... 30
RAS CONTROL UNIT PART NUMBER .............. 30
Diagnosis Procedure with Self-Diagnosis Function
(Without CONSULT-II) ............................................ 31
DESCRIPTION .................................................... 31
SELF-DIAGNOSIS PROCEDURE ...................... 31
SELF-DIAGNOSIS DISPLAY .............................. 31
SELF-DIAGNOSIS DISPLAY ITEMS .................. 31
HOW TO ERASE SELF-DIAGNOSIS ................. 31
CAN Communication .............................................. 31
For Fast and Accurate Trouble Diagnosis .............. 32
Basic Inspection ..................................................... 32
BASIC INSPECTION 1: POWER SUPPLY CIR-
CUIT TERMINAL LOOSENESS AND BATTERY ... 32
BASIC INSPECTION 2: RAS WARNING LAMP
INSPECTION ...................................................... 32
BASIC INSPECTION 3: RAS CONTROL UNIT
POWER SUPPLY CIRCUIT AND GROUND CIR-
CUIT INSPECTION ............................................. 32
Trouble Diagnosis Chart ......................................... 33
SELF-DIAGNOSIS .............................................. 33
DIAGNOSIS CHART BY SYMPTOM .................. 34
Inspection 1: RAS Control Unit Malfunction ........... 35
Inspection 2: Motor Power Supply System ............. 35

SYSTEM DESCRIPTION
STC-3
[EPS]
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STC
Revision: 2007 April2007 M35/M45
[EPS]SYSTEM DESCRIPTIONPFP:00000
ComponentsNGS000DT
Components (Models with Rear Active Steer)NGS000DU
Electronically Controlled Power Steering System FunctionNGS000DV

Vehicle speed sensing electronically controlled power steering
(that properly controls the steering force by the vehicle speed)
has been adopted. When it is normal, it controls the power
steering solenoid valve according to the vehicle speed as shown
in the figure and makes the steering force proper.

For the models with RAS (Rear Active Steer), RAS control unit
performs the same control as power steering control unit. For
schematic, refer to STC-20, "
Schematic" and trouble diagnosis,
refer to STC-47, "
Diagnosis Chart by Symptom 2" .
SGIA1056E
SGIA1094E
SST696CA