Infiniti M35/M45 Y50. Manual - part 1123

 

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Infiniti M35/M45 Y50. Manual - part 1123

 

 

TROUBLE DIAGNOSIS

STC-49

[RAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

Check RAS Static/Dynamic Characteristics

NGS000F3

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

Component Inspection

NGS000F4

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 

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 

If it is normal, it turns.

SGIA1287E

Terminal 2 – 3

: Approx. 1 k

Terminal 4 – 3

Terminal 1 – 3

: Approx. 1.25 k

SGIA1288E

TF-1

TRANSFER

D  DRIVELINE/AXLE

CONTENTS

C

E

F

G

H

I

J

K

L

M

SECTION 

TF

A

B

TF

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 .................................................................... 20

AWD 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-2

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 .................................................... 40

REAR 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

 

 

 

 

 

 

 

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