Infiniti Q45. Manual - part 897

REAR ACTIVE STEER

STC-91

[WITH REAR ACTIVE STEER]

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REAR ACTIVE STEER

PFP:55705

Removal and Installation

NGS0004K

COMPONENTS

REMOVAL

1.

Remove center muffler with power tool. Refer to 

EX-3, "Removal and Installation"

 .

2.

Remove coil spring. Refer to 

RSU-16, "Removal and Installation"

 .

NOTE:
Put the adjustment position marks of wheel alignment on the adjusting bolts and decenter cam.

3.

Disconnect each harness connectors from RAS actuator assembly and rear suspension member.

4.

Remove fixing bolts and nuts of RAS actuator assembly (1), and
then remove RAS actuator assembly (1) from rear suspension
member.

INSTALLATION

Note the following, and installation is the reverse order of removal.

●

Refer to 

STC-91, "COMPONENTS"

  about each tightening torque.

●

When installing RAS actuator assembly to rear suspension member, check the mounting surfaces of RAS
actuator assembly and rear suspension member for oil, dirt, sand, or other foreign materials.

●

Adjust rear wheel alignment. Refer to 

RSU-5, "Wheel Alignment Inspection"

 .

1.

Adjust bolt

2.

RAS actuator assembly

3.

Rear lower link

4.

Decenter cam

Refer to 

GI-9, "Components"

 , for the symbols in the figure.

SGIA1505E

SGIA1506E

STC-92

[WITH REAR ACTIVE STEER]

REAR ACTIVE STEER

Disassembly and Assembly

NGS0004L

COMPONENTS

DISASSEMBLY

1.

Remove RAS actuator assembly from RAS actuator covers.

2.

Remove mounting bolts of RAS motor assembly, and then remove RAS motor, ground terminal, O-ring
from RAS actuator assembly.

3.

Remove mounting bolts of rear wheel steering angle sensor, and then remove rear wheel steering angle
sensor, O-ring from RAS actuator assembly.

INSPECTION AFTER DISASSEMBLY

Check RAS actuator cover (rear wheel steering angle sensor mounting area) for crush, deformation, cracks,
or other damage. Replace the RAS actuator if the malfunction is detected.

ASSEMBLY

Note the following, and assembly is the reverse order of disassembly.

●

Refer to 

STC-92, "COMPONENTS"

  about each tightening torque.

●

After assembling RAS actuator assembly (after removing and installing rear wheel angle sensor and RAS
motor), perform the neutral position adjustment. Refer to 

STC-92, "Neutral Position"

 .

ADJUSTMENT AFTER ASSEMBLING

1.

Adjust neutral position. Refer to 

STC-92, "Neutral Position"

 .

2.

Adjust rear wheel alignment. Refer to 

RSU-5, "Wheel Alignment Inspection"

 .

Neutral Position

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 assembly.

●

Disassembling the RAS actuator assembly (when removing the rear wheel steering angle sensor
and RAS motor)

1.

Remove the rear lower link if RAS actuator assembly is assembled to the vehicle. Refer to 

STC-91,

"COMPONENTS"

 .

2.

Disconnect ground harness connector and rear wheel steering angle sensor harness connector.

1.

RAS actuator assembly

2.

O-ring

3.

Rear wheel steering angle sensor

4.

RAS motor

5.

Terminal earth

6.

Cover

7.

Cover

A:

Shaft

Refer to 

GI-9, "Components"

 , for the symbols in the figure.

SGIA1507E

REAR ACTIVE STEER

STC-93

[WITH REAR ACTIVE STEER]

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STC

3.

Remove rear wheel steering angle sensor from the RAS actuator assembly.

4.

Disconnect RAS motor harness connector.

5.

Install the spacer (A) as per the following procedure.

a.

Remove the boot band of the RAS actuator assembly.

b.

Turn over the boot of the RAS actuator assembly.

c.

Insert the spacer [2.9 mm (0.114 in) thick] between the rod (1)
and gear housing assembly (2).

CAUTION:

Never damage the boot and boot band.

d.

Supply 6 V voltage by connecting the four 1.5 V batteries in a
series. Connect them to the RAS motor connector (A), and then
operate the motor and adjust the neutral position by installing
the spacer.

CAUTION:

Never 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.

6.

Install rear wheel steering angle sensor with O-ring to the RAS
actuator assembly.

CAUTION:

●

Never reuse the O-ring.

●

Apply grease to the O-ring.

7.

Temporarily tighten the mounting bolts in the specified torque that the rear wheel steering angle sensor
can be moved by hand.

8.

Connect ground harness connector and rear wheel steering angle sensor harness connector.

9.

Turn ignition switch “ON”. (Do not start engine.)

10. 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.

11. Tighten rear wheel steering angle sensor mounting bolts. Refer to 

STC-92, "COMPONENTS"

 .

12. Perform the self-diagnosis and then erase self-diagnostic results. Refer to 

STC-53, "SELF-DIAGNOSTIC

PROCEDURE (WITHOUT CONSULT-II)"

  and 

STC-54, "ERASE SELF-DIAGNOSIS"

 .

13. Perform CONSULT-II “SELF-DIAG RESULTS” again, and then make sure that there is no malfunction.

Refer to 

STC-49, "SELF-DIAG RESULT MODE"

 .

SGIA1578E

Monitored item

Condition

Display value

STEERING ANG

Straight-ahead

0

°

RR ST ANG-MAI

Straight-ahead

Approx. 2.4 V

RR ST ANG-SUB

Straight-ahead

Approx. 2.4 V

SGIA1508E

STC-94

[WITH REAR ACTIVE STEER]

REAR ACTIVE STEER