Infiniti G35 (V35). Manual — part 776
STC-8
[RAS]
REAR ACTIVE STEER
Disassembly and Assembly
NGS00095
COMPONENTS
DISASSEMBLY
1.
Remove mounting bolts of RAS motor assembly, and then remove RAS motor assembly, ground terminal,
O-ring from RAS actuator.
2.
Remove mounting bolt of rear wheel steering angle sensor, and then remove rear wheel steering angle
sensor, O-ring from RAS actuator.
INSPECTION AFTER DISASSEMBLY
Check RAS actuator bracket (rear wheel steering angle sensor mounting area) for crush, deformation, cracks,
or other damage. Replace the RAS actuator malfunction is detected.
ASSEMBLY
●
Assembly is the reverse order of disassembly. For tightening torque, refer to
.
●
After assembling RAS actuator assembly (after removing and installing rear wheel angle sensor and RAS
motor), perform the neutral position adjustment.
Neutral Position Adjustment
NGS00096
Adjust neutral position after performing the following procedure.
●
Removing and installing or replacing the RAS actuator assembly
●
Disassembling the RAS actuator assembly (when removing rear wheel steering angle sensor and RAS
motor)
CAUTION:
Perform the neutral position adjustment after installing the RAS actuator assembly to the vehicle.
Before that, remove the rear lower link from the RAS actuator.
1.
Disconnect harness connector and remove rear wheel steering angle sensor from the RAS actuator
assembly.
2.
Disconnect RAS motor harness connector.
3.
Turn ignition switch ON.
1.
Ground terminal
2.
RAS motor assembly
3.
O-ring
4.
RAS actuator
5.
Rear wheel steering angle sensor
, for the symbols in the figure.
SGIA1052J
REAR ACTIVE STEER
STC-9
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
4.
Supply 6 V voltage by connecting the four 1.5 V batteries in a
series. Connect them to the RAS motor connector (motor side),
and then operate the motor and adjust the rack in the neutral
position (A).
CAUTION:
Do not supply 12 V voltage (battery, etc) to the RAS motor.
NOTE:
For right stroke, connect positive probe to the RAS motor con-
nector terminal 1. For left stroke, connect it to the terminal 2.
5.
Install rear wheel steering angle sensor with O-ring to the RAS
actuator assembly. Temporarily tighten the mounting bolts in the specified torque that the sensor can be
moved by hand.
6.
Turn and adjust the rear wheel steering angle sensor so as to make each sensor signal of “DATA MONI-
TOR” mode to the following standard with CONSULT-II.
CAUTION:
During DATA MONITOR mode, “MONITORING ERROR” is displayed. But there is not malfunction
in this procedure.
7.
Tighten rear wheel steering angle sensor mounting bolts.
8.
Perform “ERASE” with CONSULT-II, and then erase the error memory of rear wheel steering angle sen-
sor. Refer to
9.
Perform CONSULT-II “SELF-DIAG RESULTS” again, and then make sure that there is no malfunction.
Refer to
Full stroke (B)
: 6.8 - 7.2 mm (0.268 - 0.283 in)
STEERING ANG (
°
)
L - 0, R - 0, N - 0
RR ST ANG-MAI (V)
Approx. 2.4
RR ST ANG-SUB (V)
Approx. 2.4
RR ST ANG-VOL (V)
Approx. 5.0
SGIA1240E
STC-10
[RAS]
SYSTEM DESCRIPTION
SYSTEM DESCRIPTION
PFP:00000
Components
NGS00097
RAS Function
NGS00098
A.
RAS control unit
B.
Model following control
C.
Target vehicle dynamics model
D.
Rear wheel steering angle com-
mand value operation
E.
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 actuator
The 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).
SYSTEM DESCRIPTION
STC-11
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
Fail-Safe Function
NGS00099
In the event there is a malfunction with the electrical system, the RAS control is stopped and the fail-safe
mode is activated. At that time, it indicates the malfunction by turning the RAS warning lamp ON and stops the
rear wheel control.
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