control INFINITI M35 2007 Factory Service Manual

STC-44
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Inspection 8: Engine Speed Signal MalfunctionNGS000EX
1. CHECK SPEEDOMETER
Start the engine, and then check the combination meter (tachometer) operation.
Does it operate normally?
YES >> GO TO 2.
NO >> Combination meter. Refer to DI-5, "
COMBINATION METERS" .
2. CHECK RAS CONTROL UNIT CONNECTOR
1. Turn ignition switch OFF, disconnect RAS control unit harness connector, and check terminal for deforma-
tion, disconnection, looseness, etc.
2. Reconnect harness connector securely, and perform self-diagnosis.
With CONSULT-II
Without CONSULT-II
Is above displayed on self-diagnosis display?
YES >> RAS control unit malfunction. Replace RAS control unit.
NO >> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
Inspection 9: CAN Communication System MalfunctionNGS000EY
1. CHECK RAS CONTROL UNIT CONNECTOR
1. Turn ignition switch OFF, disconnect RAS control unit harness connector and rear wheel steering angle
sensor harness connector, and check terminal for deformation, disconnection, looseness, etc.
2. Reconnect harness connector securely, and perform CONSULT-II self-diagnosis.
Is above displayed on self-diagnosis display?
YES >>
If “CAN COMM [U1000]” is displayed, print out self–diagnosis. And then, GO TO LAN-50, "CAN
System Specification Chart" .

Replace RAS control unit if “CONTROL UNIT [CAN] [U1010]” is displayed.
NO >> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
Self-diagnostic results
MOTOR OUTPUT [C1921]
DTC (warning lamp blinks)
33
Self-diagnostic results
CAN COMM CIRCUIT [U1000]
CONTROL UNIT (CAN) [U1010]

TROUBLE DIAGNOSIS
STC-45
[RAS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: 2007 April2007 M35/M45
Inspection 10: Stop Lamp Switch HarnessNGS000EZ
1. CHECK STOP LAMP SWITCH SIGNAL
With CONSULT-II
Select “STOP LAMP SW” on DATA MONITOR, and then check the stop lamp switch.
Without CONSULT-II
1. Turn ignition switch OFF, disconnect RAS control unit harness connector B476.
2. Operate brake pedal, and then check voltage between RAS con-
trol unit harness connector B476 and ground.
OK or NG
OK >> Stop lamp switch harness is normal.
NG >> Stop lamp switch harness malfunction. Repair circuit.
Measuring condition Data monitor
Brake pedal depressed ON
Brake pedal released OFF
SGIA1277E
RAS C/U Ground Measuring condition Voltage
Terminal 22 —Brake pedal depressed Battery voltage (approx. 12 V)
Brake pedal released Approx. 0 V

STC-46
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Inspection 11: RAS Warning Lamp HarnessNGS000F0
1. CHECK RAS WARNING LAMP SIGNAL
Turn ignition switch ON, and then check voltage between RAS con-
trol unit harness connector B476 and ground.
OK or NG
OK >> Perform self-diagnosis. Refer to STC-28, "SELF-DIAG
RESULT MODE" .
NG >> GO TO 2.
2. CHECK RAS WARNING LAMP HARNESS
1. Turn ignition switch OFF, disconnect RAS control unit harness connector B476 and combination meter
harness connector M52.
2. Check continuity between RAS control unit harness connector
B476 and combination meter harness connector M52.
3. Check continuity between RAS control unit harness connector
B476 and ground.
OK or NG
OK >> GO TO combination meter power supply circuit.
NG >> Harness between RAS control unit and combination
meter open or shorted. Repair or replace harness.
RAS control unit Ground Voltage
Terminal 26 —Warning lamp OFF : Approx. 2.8 V or more
Warning lamp ON : Approx. 1.4 V or less
SGIA1278E
Terminal 26 − 19 : Continuity should exist.
SGIA1279E
Terminal 26 − Ground : Continuity should not exist.
SGIA1280E

TROUBLE DIAGNOSIS
STC-47
[RAS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: 2007 April2007 M35/M45
Diagnosis Chart by Symptom 1NGS000F1
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform RAS self-diagnosis.

With CONSULT-II: STC-28, "SELF-DIAG RESULT MODE"

Without CONSULT-II: STC-31, "Diagnosis Procedure with Self-Diagnosis Function (Without CONSULT-
II)"
Are malfunctioning items displayed in self-diagnosis results?
YES >> Repair or replace any malfunctioning items.
NO >> GO TO 2.
2. CHECK RAS STATIC/DYNAMIC CHARACTERISTICS
Check RAS static/dynamic characteristics. Refer to STC-49, "
Check RAS Static/Dynamic Characteristics" .
Is the malfunction corrected?
YES >> INSPECTION END
NO >> Perform the following check, and then check the symptom again.

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

Steering angle sensor mounting condition. Refer to BRC-60, "Removal and Installation" .
Diagnosis Chart by Symptom 2NGS000F2
The steering force does not change smoothly according to the vehicle speed (Heavy steering force with the
vehicle stopped/Light handle operation during high-speed driving)
1. CHECK (1): POWER STEERING SOLENOID VALVE SIGNAL
1. Start engine.
2. Change the vehicle speed from 0 to 100 km/h (0 to 62 MPH)
slowly, and then check voltage RAS control unit harness con-
nector B476.
OK or NG
OK >> GO TO 2.
NG >> GO TO 7.
2. CHECK (2): POWER STEERING SOLENOID VALVE SIGNAL
1. Activate fail-safe function by running engine speed at 1,500 rpm or higher for 10 seconds with the vehicle
stopped.
2. Change the engine speed to the idling speed, approx. 1,600
rpm, and approximately 3,000 rpm slowly, and then check volt-
age RAS control unit harness connector B476.
OK or NG
OK >> GO TO 3.
NG >> GO TO 7.Terminal 36 – 34 : The voltage has changed from
approximately 4.4 - 6.6 V to approxi-
mately 2.4 - 3.6 V.
SGIA1281E
Terminal 36 – 34 : The voltage is changed from
approximately 5.5 V to approximately
2.1 V step-by-step.
SGIA1281E

STC-48
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
3. CHECK POWER STEERING SOLENOID VALVE CONNECTOR
Turn ignition switch OFF, disconnect power steering solenoid valve harness connector, and check terminal for
deformation, disconnection, looseness, etc.
OK or NG
OK >> GO TO 4.
NG >> Harness or connector open or shorted. Repair or replace any inoperative parts.
4. CHECK POWER STEERING SOLENOID VALVE POWER SUPPLY CIRCUIT
Check continuity between RAS control unit harness connector B476
(A) and power steering solenoid valve harness connector F25
(VQ35DE), E211 (VK45DE) (B).
OK or NG
OK >> GO TO 5.
NG >> Open or short in harness. Repair or replace any inoper-
ative parts.
5. CHECK POWER STEERING SOLENOID VALVE GROUND CIRCUIT
Check continuity between power steering solenoid valve harness
connector F25 (VQ35DE), E211 (VK45DE) and ground.
OK or NG
OK >> GO TO 6.
NG >> Open or short in harness. Repair or replace any inoper-
ative parts.
6. CHECK POWER STEERING SOLENOID VALVE
Apply voltage power steering solenoid valve connector F25
(VQ35DE), E211 (VK45DE) and then make sure that the operating
sound (clicking sound) is heard.
OK or NG
OK >> Perform steering wheel turning force inspection. Refer
to PS-10, "
CHECKING STEERING WHEEL TURNING
FORCE" .
NG >> Power steering solenoid valve is inoperating. Replace it.
7. CHECK SELF-DIAGNOSIS RESULTS
Perform RAS self-diagnosis.

With CONSULT-II: STC-28, "SELF-DIAG RESULT MODE"

Without CONSULT-II: STC-31, "Diagnosis Procedure with Self-Diagnosis Function (Without CONSULT-
II)"
Are malfunctioning items displayed in self-diagnosis results?
YES >> Repair or replace any malfunctioning items.
NO >> RAS control unit malfunction. Replace it.
RAS C/U Power steering solenoid valve Continuity
Terminal 36 Terminal 1 Yes
SGIA1652E
Terminal 2 – Ground : Continuity should exist.
SGIA1283E
Terminal 1 (+) - 2 (-) : Operating sound is heard.
SGIA1284E

TROUBLE DIAGNOSIS
STC-49
[RAS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: 2007 April2007 M35/M45
Check RAS Static/Dynamic CharacteristicsNGS000F3
1. CHECK (1): RAS ACTUATOR STROKE
Perform CONSULT-II “ACTIVE TEST”, and then check the actuator
stroke when turning the steering wheel clockwise or counterclock-
wise by 180° or more.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK (2): RAS ACTUATOR STROKE
Perform CONSULT-II “ACTIVE TEST“. When turning the steering
wheel in neutral position (A), the rear wheel turns clockwise/counter-
clockwise periodically. At that time, check actuator stroke (B).
OK or NG
OK >> RAS static/dynamic characteristics inspection is com-
pleted.
NG >> GO TO 3.
3. CHECK RAS MOTOR
Check RAS motor itself separated from other parts. Refer to STC-50, "
RAS MOTOR" .
OK or NG
OK >> GO TO 4.
NG >> RAS motor malfunction. Check the stroke again after replacing.
4. CHECK REAR WHEEL STEERING ANGLE SENSOR
Check rear wheel steering angle sensor separated from other parts. Refer to STC-50, "
REAR WHEEL
STEERING ANGLE SENSOR" .
OK or NG
OK >> GO TO 5.
NG >> Rear wheel steering angle sensor malfunction. Check the stroke again after replacing.
5. CHECK RAS CONTROL UNIT
Replace RAS control unit. Check the symptom of malfunction again.
Is the malfunction corrected?
YES >> RAS control unit malfunction
NO >> GO TO 6.
6. REPLACE RAS ACTUATOR ASSEMBLY
Replace RAS actuator assembly. Check the symptom of malfunction again.
Is the malfunction corrected?
YES >> RAS actuator malfunction
NO >> Check rear suspension components. Refer to RSU-7, "
Components" . Neutral position (A)
Actuator stroke (B) : 2.8 - 3.0 mm (0.110 - 0.118 in)
SGIA1240E
Actuator stroke (B) : 2.3 - 2.5 mm (0.091 - 0.098 in)
SGIA1240E

TF-1
TRANSFER
D DRIVELINE/AXLE
CONTENTS
C
E
F
G
H
I
J
K
L
M
SECTION TF
A
B
TF
Revision: 2007 April2007 M35/M45
TRANSFER
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions .............................................................. 3
Service Notice or Precautions .................................. 4
PREPARATION ........................................................... 5
Special Service Tools ............................................... 5
Commercial Service Tools ........................................ 7
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 8
NVH Troubleshooting Chart ..................................... 8
TRANSFER FLUID ..................................................... 9
Replacement ............................................................ 9
DRAINING ............................................................. 9
FILLING ................................................................. 9
Inspection ................................................................. 9
FLUID LEAKAGE AND FLUID LEVEL .................. 9
AWD SYSTEM .......................................................... 10
Power Transfer Diagram ........................................ 10
System Description ................................................ 10
DESCRIPTION .................................................... 10
ELECTRIC CONTROLLED COUPLING .............. 11
AWD CONTROL UNIT ......................................... 11
AWD WARNING LAMP ....................................... 12
System Diagram ..................................................... 12
COMPONENTS FUNCTION DESCRIPTION ..... 13
CAN Communication .............................................. 13
SYSTEM DESCRIPTION .................................... 13
TROUBLE DIAGNOSIS ............................................ 14
Fail-Safe Function .................................................. 14
How to Perform Trouble Diagnosis ........................ 14
BASIC CONCEPT ............................................... 14
Location of Electrical Parts ..................................... 15
Circuit Diagram ...................................................... 16
Wiring Diagram — AWD — .................................... 17
Trouble Diagnosis Chart for Symptoms ................. 20
AWD Control Unit Input/Output Signal Reference
Values .................................................................... 20AWD CONTROL UNIT INSPECTION TABLE ..... 20
CONSULT-II Function (ALL MODE AWD/4WD) ..... 21
FUNCTION .......................................................... 21
CONSULT-II SETTING PROCEDURE ................ 22
SELF-DIAG RESULT MODE ............................... 22
DATA MONITOR MODE ...................................... 24
ACTIVE TEST MODE ......................................... 25
AWD CONTROL UNIT PART NUMBER ............. 25
TROUBLE DIAGNOSIS FOR SYSTEM .................... 26
Power Supply Circuit for AWD Control Unit ............ 26
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 26
DIAGNOSTIC PROCEDURE .............................. 26
AWD Control Unit ................................................... 27
DIAGNOSTIC PROCEDURE .............................. 27
ABS System ........................................................... 27
DIAGNOSTIC PROCEDURE .............................. 27
AWD Solenoid ........................................................ 28
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 28
DIAGNOSTIC PROCEDURE .............................. 28
COMPONENT INSPECTION .............................. 30
AWD Actuator Relay ............................................... 31
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 31
DIAGNOSTIC PROCEDURE .............................. 31
Engine Control Signal ............................................. 32
DIAGNOSTIC PROCEDURE .............................. 32
CAN Communication Line ...................................... 32
DIAGNOSTIC PROCEDURE .............................. 32
TROUBLE DIAGNOSIS FOR SYMPTOMS .............. 33
AWD Warning Lamp Does Not Turn ON When The
Ignition Switch Is Turned to ON .............................. 33
DIAGNOSTIC PROCEDURE .............................. 33
AWD Warning Lamp Does Not Turn OFF Several
Seconds after Engine Started ................................. 33
DIAGNOSTIC PROCEDURE .............................. 33
Heavy Tight-Corner Braking Symptom Occurs
When The Vehicle Is Driven and The Steering Wheel
Is Turned Fully to Either Side after The Engine Is

TF-2Revision: 2007 April2007 M35/M45 Started .................................................................... 35
DIAGNOSTIC PROCEDURE .............................. 35
Vehicle Does Not Enter AWD Mode Even Though
AWD Warning Lamp Turned to OFF ....................... 36
DIAGNOSTIC PROCEDURE .............................. 36
While Driving, AWD Warning Lamp Flashes Rapidly
(When Flashing in Approx. 1 Minute and Then Turn-
ing OFF) ................................................................. 37
While Driving, AWD Warning Lamp Flashes Slowly
(When Continuing to Flash until Turning Ignition
Switch OFF) ............................................................ 37
DIAGNOSTIC PROCEDURE .............................. 37
AWD CONTROL UNIT .............................................. 39
Removal and Installation ........................................ 39
REMOVAL ........................................................... 39
INSTALLATION .................................................... 39
FRONT OIL SEAL ..................................................... 40
Removal and Installation ........................................ 40
REMOVAL ........................................................... 40
INSTALLATION .................................................... 40REAR OIL SEAL ....................................................... 41
Removal and Installation ......................................... 41
REMOVAL ............................................................ 41
INSTALLATION .................................................... 42
AIR BREATHER HOSE ............................................. 43
Removal and Installation ......................................... 43
TRANSFER ASSEMBLY ........................................... 44
Removal and Installation ......................................... 44
REMOVAL ............................................................ 44
INSTALLATION .................................................... 44
Disassembly and Assembly .................................... 45
COMPONENTS ................................................... 45
DISASSEMBLY .................................................... 46
INSPECTION ....................................................... 51
ASSEMBLY .......................................................... 52
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 59
General Specifications ............................................ 59

PRECAUTIONS
TF-3
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: 2007 April2007 M35/M45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NDS000D3
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
PrecautionsNDS000D4

Before connecting or disconnecting the AWD control unit
harness connector, turn ignition switch “OFF” and discon-
nect battery ground cable. Because battery voltage is
applied to AWD control unit even if ignition switch is turned
“OFF”.

When connecting or disconnecting pin connectors into or
from AWD control unit, take care not to damage pin termi-
nals (bend or break).
When connecting pin connectors, make sure that there are
no bends or breaks on AWD control unit pin terminal.

Before replacing AWD control unit, perform AWD control
unit input/output signal inspection and make sure whether
AWD control unit functions properly or not. Refer to TF-20,
"AWD Control Unit Input/Output Signal Reference Values" .
SEF289H
SEF291H
SDIA1848E

TF-10
AWD SYSTEM
Revision: 2007 April2007 M35/M45
AWD SYSTEMPFP:41650
Power Transfer DiagramNDS000DB
System DescriptionNDS000DC
DESCRIPTION

Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.

Makes possible stable driving, with no wheel spin, on snowy roads or other slippery surfaces.

On roads which do not require AWD, it contributes to improved fuel economy by driving in conditions close
to rear-wheel drive.

Sensor inputs determine the vehicle's turning condition, and in response tight cornering/braking are con-
trolled by distributing optimum torque to front wheels.
NOTE:

When driving, if there is a large difference between front and rear wheel speed which continues for a long
time, fluid temperature of drive system parts becomes too high and AWD warning lamp flashes rapidly.
(When AWD warning lamp flashes, vehicle changes to rear-wheel drive conditions.) Also, optional distri-
bution of torque sometimes becomes rigid before lamp flashes rapidly, but it is not malfunction.

If AWD warning lamp is flashing rapidly, stop vehicle and allow it to idle for some time. Flashing will stop
and AWD system will be restored.

When driving, AWD warning lamp may flash slowly if there is a significant difference in diameter of the
tires. At this time, vehicle performance is not fully available and cautious driving is required. (Continues
until engine is turned OFF.)

If the warning lamp flashes slowly during driving but remains OFF after engine is restarted, the system is
normal. If it again flashes slowly after driving for some time, vehicle must be inspected.

When the difference of revolution speed between the front and rear wheel the shift occasionally changes
to direct 4-wheel driving conditions automatically. This is not malfunction.
SDIA1611E