Infiniti Q45 (FY33). Manual - part 431

System Components

SFA001C

SFA993B

Component Description

CONTROL UNIT

The control unit calculates the direction and the speed of the
vehicle based on input signals from each sensor, and controls
actuators (step motors) for optimum damping force of shock
absorbers. In case of the trouble in the electric system, the control
unit controls actuators (step motors) for constant damping force
according to signals stored in control unit.

SFA994B

STEERING ANGLE SENSOR

Three optical, non-contact type sensors are used to send signals
of the steering direction, neutral position, and lock angle to the
control unit.
Steering angle sensors consist of LEDs, phototransistors which
transform light to electric signals, and slit sheets which rotate with
the steering wheel. The sensors receive light through slit sheets
which rotate and shade light, turning ON/OFF the phototransistors.

IDX

ACTIVE DAMPER SUSPENSION

FA-23

SFA995B

SFA002C

VERTICAL G SENSOR

The vertical G sensor detects the up/down accelerations of the
vehicle, and sends signals to the control unit.
The vertical G sensor consists of semiconductor piezo elements for
the detecting element. The sensor detects accelerations as distor-
tion amount and transforms the amount to a voltage signal through
the amplification circuit.

CAUTION:

Because the sensor is susceptible to mechanical impact, be
sure to handle it with care.

SFA997B

SHOCK ABSORBER ACTUATOR

Shock absorber actuators are installed on the upper part of shock
absorbers to control the damping force of shock absorbers by out-
put signals from the control unit.
The motor operating angle is about 70°. The shock absorber actua-
tor instantly controls 140 patterns of damping force.

ACTIVE DAMPER SUSPENSION

Component Description (Cont’d)

FA-24

Active Damper Suspension Configuration

SFA003C

IDX

ACTIVE DAMPER SUSPENSION

FA-25

Active Damper

SFA972B

ACTIVE DAMPER SUSPENSION

FA-26

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