Infiniti G37 Coupe. Manual — part 1245
INSPECTION AND ADJUSTMENT
STC-31
< BASIC INSPECTION >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
CAUTION:
Stop the vehicle.
2.
Steer 90
°
leftward slowly. Then steer 90
°
rightward.
3.
Steer 90
°
leftward slowly again. Then steer 90
°
rightward. Return the steering wheel to the straight-ahead
position.
4.
Stop the vehicle in the straight-ahead position after driving for a period of time. (Engine running)
>> GO TO 5.
5.
CHECK 4WAS FRONT ACTUATOR
With CONSULT-III
1.
Check “4WAS STR ANG” item on “DATA MONITOR” of 4WAS front control unit.
CAUTION:
Never touch the steering wheel during the service.
2.
Turn the ignition switch OFF.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 1.
6.
PERFORM ACTIVE TEST (SLOW MODE)
With CONSULT-III
1.
Start the engine.
CAUTION:
Stop the vehicle.
2.
Select “SLOW MODE” item on “ACTIVE TEST” of 4WAS front control unit.
3.
Perform “MODE START” of “ACTIVE TEST”.
4.
Steer the steering wheel leftward slowly until the turning stops.
5.
Steer the steering wheel rightward slowly until the turning stops.
Is “OK” indicated on both right and left on “SLOW MODE”?
YES
>> GO TO 7.
NO
>> GO TO 1.
7.
PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)
With CONSULT-III
Perform 4WAS front control unit self-diagnosis.
Is any error system detected?
YES
>> Check the error system.
NO
>> GO TO 8.
8.
ERASE ERROR HISTORY
With CONSULT-III
Erase the memory of 4WAS front control unit and 4WAS main control unit self-diagnosis result.
>> END
4WAS STR ANG
:
−
3.5 – 3.5 deg
STC-32
< FUNCTION DIAGNOSIS >
[WITH 4WAS]
4WAS SYSTEM
FUNCTION DIAGNOSIS
4WAS SYSTEM
System Diagram
INFOID:0000000001666296
CONTROL DIAGRAM
CROSS-SECTIONAL VIEW
4WAS Front Actuator
JSGIA0010GB
JSGIA0059JP
1.
Front wheel steering angle sensor
2.
4WAS front lock solenoid valve (lock
structure)
3.
4WAS front motor
4.
Gear shaft
4WAS SYSTEM
STC-33
< FUNCTION DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
4WAS Rear Actuator
System Description
INFOID:0000000001666297
DESCRIPTION
• 4WAS system consists of two control units (4WAS front control unit and 4WAS main control unit) and 4WAS
rear actuator components.
• 4WAS main control unit calculates front wheel and rear wheel angles via CAN communication based on the
information of the steering angle sensor signal and vehicle speed signal.
• 4WAS main control unit controls 4WAS rear actuator according to the value calculated in 4WAS main control
unit.
• It transmits the value that is calculated by 4WAS main control unit to 4WAS front control unit via 4WAS com-
munication line (exclusive line of 4WAS system). 4WAS front control unit controls 4WAS front actuator
based on the received demand.
• Self-diagnosis can be performed with CONSULT-III at each control unit to another (4WAS front control unit
and 4WAS main control unit).
• It transmits/receives each signal from the following control unit via CAN communication line.
*: Communication line between 4WAS front control unit and 4WAS main control unit
Operation Description
• The following performance is gained by controlling the best front wheel steering angle and the rear wheel
steering angle.
- The desirable vehicle movement is gained toward the driver's steering angle operation (steering angle).
SGIA1577E
1.
Rod
2.
Offset shaft
3.
Gear housing assembly
4.
4WAS rear motor
5.
Motor shaft
6.
Rear wheel steering angle sensor
7.
HRH gear
Component parts
Function
Steering angle sensor
It mainly transmits the following signals to 4WAS main control unit with CAN communication.
• Steering angle sensor signal
ABS actuator and electronic unit (con-
trol unit)
It mainly transmits the following signals to 4WAS main control unit with CAN communication.
• Vehicle speed signal
ECM
It mainly transmits the following signals to 4WAS main control unit with CAN communication.
• Engine speed signal
Combination meter
It mainly transmits the following signals from 4WAS main control unit with CAN communica-
tion.
• 4WAS warning lamp signal
STC-34
< FUNCTION DIAGNOSIS >
[WITH 4WAS]
4WAS SYSTEM
- The steering gear ratio changes according to the vehicle speed.
The steering wheel operation (steering angle) load decreases.
When Driving at Low Speed
• Increased front wheel angle gains the optimum front wheel angle
by minimum steering wheel operation (steering angle).
When Driving at Middle Speed
• Increase the front steering angle while controlling to turn the rear
wheel steering angle to the same steering angle side of steering
wheel operation (steering angle). these operations make response
better for vehicle yaw rate/lateral acceleration and also decrease
the angle of sideslip.
When Driving at High Speed
• Decrease the front wheel steering angle while controlling to turn
the rear wheel steering angle to the same steering angle side of
steering wheel operation (steering angle). these operations make
car response better and vehicle stability higher.
Operation Feature
4WAS FRONT ACTUATOR
• It is driven by 4WAS front motor.
• The front steering gear ratio (4WAS front actuator) changes with 4WAS front motor and the gear shaft when
releasing the lock structure (4WAS front lock solenoid valve).
NOTE:
The lock structure is released when turning 4WAS lock solenoid valve ON.
JSGIA0080GB
JSGIA0050GB
JSGIA0082GB
JSGIA0084GB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст