2007 INFINITI M35 component

STC-16
[RAS]
SYSTEM DESCRIPTION
Revision: 2007 April2007 M35/M45
SYSTEM DESCRIPTIONPFP:00000
ComponentsNGS000E8
RAS (Rear Active Steer) FunctionNGS000E9
A. RAS control unit B. Model following control C. Target vehicle dynamics model
D. Rear wheel steering angle com-
mand value operationE. Rear wheel steering angle servo F. Vehicle speed signal (CAN)
G. Steering angle signal (CAN) H. Vehicle speed sensor I. Steering angle sensor
J. RAS actuator assembly
SGIA1241E
Part name Function
RAS control unit

Calculate the vehicle speed signal from CAN communication and the signals from steering
angle sensor and rear wheel steering angle sensor by a computer, and then control the rear
wheel steering angle.

Fail-safe function is activated when the electrical system is malfunctioning. The output signal
to the actuator is turned OFF during this mode. At that time, the RAS warning lamp illumi-
nates and indicates the system is malfunctioning.

It performs the communication control function with other control units via CAN communica-
tion.

This enables system diagnosis with CONSULT-II.
RAS actuatorThe efficiency of the rear wheel steer improves by locating the electric motor actuator into the
lower link of rear suspension.
Steering angle sensor

Measure the steering angle and send it to RAS control unit via CAN communication.

It is shared with the steering angle sensor for VDC.
Rear wheel steering angle sensor

It sends the rear wheel steering angle status to RAS control unit. The accuracy of rear wheel
steer improves by comparing the vehicle speed signal from CAN communication with the
rear wheel steering angle target value calculated from the wheel angle sensor signal, and it
controls them.

There are 2 types of rear wheel steering angle sensors (main/sub). If one of them is malfunc-
tioning, the other operates the fail-safe mode and stops the control.
RAS warning lamp

It turns on when the fail-safe function is operated and indicates that a RAS control malfunc-
tion has occurred.

It turns on when ignition switch turns on and turns off after the engine is started.

It indicates the suspect system by blinking when performing the self-diagnosis (without CON-
SULT-II).

TROUBLE DIAGNOSIS
STC-19
[RAS]
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STC
Revision: 2007 April2007 M35/M45
Component Parts LocationNGS000EC
A. RAS warning lamp B. Steering angle sensor C. RAS control unit
D. RAS motor relay E. RAS motor F. Rear wheel steering angle sensor
G. Noise suppressor
SGIA1053J

STC-28
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
CONSULT-II SETTING PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
SELF-DIAG RESULT MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. Touch “PRINT” to print out the self-diagnostic results if necessary. Check RAS warning lamp if “NO FAIL-
URE” is displayed.
3. Perform the appropriate inspection from the display item list, and repair or replace the malfunctioning
component. Refer to STC-28, "
Display Item List" .
Display Item List
CAUTION:
When malfunctions are detected in several systems, including the “CAN COMM [U1000]” and “CON-
TROL UNIT (CAN) [U1010]”, inspect the CAN communication system.
DTC Diagnostic item Diagnostic item is detected when... Check items
C1923 STEERING ANGLE SEN [NO CHANGE]While driving at 60 km/h (37 MPH)
or more, steering angle does not
change for a while.STC-39
C1924 STEERING ANGLE SEN [NO NEUT STATE]When driving some distance, no
neutral signal (ON signal) is input.STC-39
C1915 RR ST ANGLE SENSOR [MAIN SIGNAL]The main sensor input signal is
malfunctioning for some time
against the sensor power supply
value.STC-40
C1916 RR ST ANGLE SENSOR [SUB SIGNAL]When the main sensor input signal
is 2.4 - 2.6 V, the sub sensor input
signal is malfunctioning for some
time compared to the sensor power
supply value.STC-40
C1917 RR ST ANGLE SENSOR [OFFSET SIG1] An excessive difference has
occurred in the input values of main
sensor and sub sensor.STC-40
C1918 RR ST ANGLE SENSOR [OFFSET SIG2]
C1914 RR ST ANGLE SENSOR [ABNORMAL VOL]Higher or lower value compared to
the standard voltage.STC-40
C1921 MOTOR OUTPUTNo engine speed is input for a cer-
tain time.STC-44
C1911 MOTOR VOLTAGE [LOW VOLTAGE]The motor power supply voltage is
lower than ignition power supply
voltage with RAS motor relay ON.STC-35
C1912 MOTOR VOLTAGE [BAD OBSTRCT]The motor power supply voltage is
inputting for some time with motor
power supply OFF by RAS control
unit.STC-35
C1913 MOTOR OUTPUT [ABNORMAL SIG]When the motor current value is 10
A or more, actual output is exces-
sively low and the condition contin-
ues for some time.STC-37
C1902 MOTOR OUTPUT [REV CURRENT]The current flows in the opposite
direction when the motor current is
output. STC-37
C1903 MOTOR OUTPUT [NO CURRENT]The current flows when the motor
current is not output. STC-37
C1904 MOTOR OUTPUT [OVERCURRENT]The excessive high current flows
when the motor current is output.STC-37

TROUBLE DIAGNOSIS
STC-49
[RAS]
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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

STC-50
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Component InspectionNGS000F4
RAS MOTOR RELAY
1. Check the resistance between RAS motor relay connector
B480.
2. When applying or not supplying approximately 12 V between
RAS motor relay connector, check continuity RAS motor relay
connector B480.
RAS MOTOR
1. Check the resistance RAS motor connector B463.
2. Remove RAS motor from RAS actuator, and then turn the motor
by 6 V battery.
CAUTION:
Do not apply 12 V (battery voltage) to the RAS motor termi-
nal because RAS motor might be damaged.
REAR WHEEL STEERING ANGLE SENSOR
1. Disconnect rear wheel steering angle sensor harness connector B465.
2. Check resistance of rear wheel steering angle sensor connec-
tors B465.Terminal 1 – 2 : Approx. 74 Ω
SGIA1266E
Terminal 3 – 5 : When applying 12 V voltage: Continu-
ity exist.
: When not applying 12 V voltage: Con-
tinuity not exist.
SGIA1286E
Terminal 1 – 2 : Approx. 0.6 Ω
If it is normal, it turns.
SGIA1287E
Te r m i n a l 2 – 3
: Approx. 1 kΩ
Te r m i n a l 4 – 3
Terminal 1 – 3 : Approx. 1.25 kΩ
SGIA1288E

TF-1
TRANSFER
D DRIVELINE/AXLE
CONTENTS
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SECTION TF
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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

TRANSFER FLUID
TF-9
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TF
Revision: 2007 April2007 M35/M45
TRANSFER FLUIDPFP:31001
ReplacementNDS000D9
DRAINING
1. Run the vehicle to warm up the transfer unit sufficiently.
2. Stop the engine, and remove the drain plug to drain the transfer
fluid.
CAUTION:
When draining fluid, protect exhaust tube flange with cover.
3. Apply sealant to drain plug. Install drain plug on transfer and
tighten to the specified torque. Refer to TF-45, "
COMPO-
NENTS" .

Use Genuine Silicone RTV or equivalent. Refer to GI-47,
"Recommended Chemical Products and Sealants" .
CAUTION:
Remove old sealant adhering to mounting surfaces. Also
remove any moisture, oil, or foreign material adhering to application and mounting surfaces.
FILLING
1. Remove filler plug and add transfer fluid until fluid level reaches
the specified limit near filler plug mounting hole.
CAUTION:
Carefully fill the fluid. (Fill up for approx. 3 minutes.)
2. Leave the vehicle for 3 minutes, and check the fluid level again.
3. Set a new gasket onto filler plug and install it on transfer and
tighten to the specified torque. Refer to TF-45, "
COMPO-
NENTS" .
CAUTION:
Do not reuse gasket.
InspectionNDS000DA
FLUID LEAKAGE AND FLUID LEVEL
1. Check if fluid is leaking from transfer or around it.
2. Check fluid level from filler plug mounting hole as shown in the
figure.
CAUTION:
Never start engine while checking fluid level.
3. Before installing filler plug, set a new gasket. Install filler plug on
transfer and tighten to the specified torque. Refer to TF-45,
"COMPONENTS" .
CAUTION:
Do not reuse gasket.
SDIA2087E
Fluid capacity
: Approx. 1.25 (2-5/8 US pt, 2-1/4 lmp pt)
SDIA2028E
SDIA2028E