Porsche Cayenne Turbo Driver Manual page 251

Limits of ultrasonic measurement
– ParkAssist cannot detect sound-absorbing
obstacles (such as powder snow),
– sound-reflecting obstacles (such as glass
surfaces and flat painted surfaces),
– and very thin obstacles.
Other ultrasound sources (such as the pneumatic
brakes of other vehicles and jackhammers) can
interfere with the detection of obstacles.
Fault indication without warning tone
All red LED segments of the active warning indica-
tors light up when there is a temporary fault in
ParkAssist as a result of other ultrasound sources.
Note
Correct operation is no longer guaranteed if there
is a temporary fault (e.g. caused by ice formation
or heavy soiling on the sensors).
The system detects the temporary fault. All LED
segments light up until a speed of 14 km/h
(9 mph) is reached.
ParkAssist is ready for operation again when the
interference is no longer present.
Fault indication with warning tone
In the event of a permanent fault in ParkAssist,
the red LED segments of the active warning indica-
tors light up and a continuous tone sounds for
three seconds after a transmission range has
been selected.
Possible causes
– Defect or system fault.
f Switch ParkAssist off.
When ParkAssist is switched off, the indicator
light in the button lights up.
Please observe the chapter "SWITCHING
PARKASSIST ON AND OFF" on Page 248.
f Have the fault remedied. Consult a qualified
specialist workshop. We recommend that you
use a Porsche partner for this work since
these are staffed with trained personnel and
have the necessary parts and tools.
Driving with a trailer
The ParkAssist rear monitoring area is switched
off when the trailer's power supply is plugged in.
251
Parking