User Manual - Page 156

For 2019 ALFA ROMEO 4C SPIDER.

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Acoustic Signal
When REVERSE gear is engaged, and there is an
obstacle behind the vehicle, an acoustic signal is emitted
which varies according to the distance of the bumper
from the obstacle.
The frequency of the acoustic signal:
Increases as the distance between vehicle and ob-
stacle decreases, culminating in a continuous acous-
tic signal when the distance is less than approxi-
mately 12 inches (30 cm).
Decreases if the distance from the obstacle increases,
until the signal ceases entirely.
Remains constant if the distance between vehicle and
obstacle remains unchanged; if this situation con-
cerns the side sensors, the signal will stop after
approximately 3 seconds, for example, in the event of
parking along a wall.
If several obstacles are detected by the sensors, only the
nearest one is considered.
Indications On Display If Equipped
When the sensors are activated, the parking sensor
display screen appears in the instrument cluster.
Obstacle presence and distance information is therefore
provided both by the acoustic signal and the instrument
cluster display.
The system indicates a detected obstacle by displaying
an arc in one or more positions according to the distance
of the obstacle and its position in relation to the vehicle.
Parking Sensor Display Screen
154 STARTING AND OPERATING
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