This device allows maximum ease of manoeuvring during parking;
with reverse gear engaged, it indicates if the driver is approaching
an obstacle that could be outside his field of vision, as illustrated
in the diagram below.The system operates in accordance with the
ultrasound 'sonar' principle: four ultrasound transducers are located
in the rear bumper. They send signals to a control unit, which processes
this information and determines the distance of possible obstacles.A loudspeaker controlled by the control
unit emits an intermittent tone, proportional to the distance of
the obstacle detected.The control unit is activated when reverse
gear is engaged: under these conditions it energizes the transducers
and sends them a signal request, and receives response signals from them.The control unit emits a signal with intermittent
tone: the frequency of this sound increases as the bumper comes
close to an obstacle: when the calculated distance falls below 25
cm, the sound becomes acute and constant.If the distance measured from the obstacle
increases, or if the driver disengages reverse gear, the sound stops.
If the distance measured from the obstacle remains constant, the sound
ceases after about 3 seconds.
For more details and information on the
operation of the system,
Characteristic of working principle 5580H parking obstacle detection
device
The signal that the reversing light has
been switched on
See E2022 REVERSING LIGHTS
is
managed by the Body Computer which forwards this information to
the parking sensor control unit via the CAN network.
The system is supplied via a circuit protected
by a specific fuse in the underfacia control unit.