1 Series E87 118d (M47T2) 5-door
The detection of objects can test the physical limits of ultrasonic measurements if the ultrasonic waves are
reflected either poorly or not at all (e.g. due to trailer tow bars or narrow objects).
Objects close to the ground can suddenly "disappear", before a continuous tone sounds (e.g. a high
kerbstone).
Loud noises outside and inside the vehicle can drown out the PDC signal tone.
It therefore remains the driver's responsibility to watch for obstacles, even in vehicles with PDC.
During operation, the following system functions, which require explanation, can occur due to the limits of the
functional range (for the driver):
•
Under the following conditions, it could happen that the PDC gives a warning, even though there is no
obstacle within the effective range:
-
Ultrasonic sensor incorrectly located in its bracket
-
Heavy rainfall
-
Ultrasonic sensors covered in snow
-
Exhaust gases
-
Echo pulses caused by ground, e.g. extremely coarse road surface or high grass
-
Very smooth walls in large, enclosed, rectangular spaces, e.g. in underground car parks (interference
from previously reflected echo pulses)
-
Protective cap for trailer coupling ball head incorrectly seated or objects being transported protruding
into the effective range of the ultrasonic sensors.
•
Under the following conditions, the PDC may not recognise an obstacle that is present:
-
Objects close to the ground (no reflection)
-
Objects with corners and sharp edges (no reflection)
-
If you drive alongside a wall for more than 3 seconds, the acoustic warning will be deactivated. Here,
the distance must be greater than the effective range for the continuous tone (approx.
25 centimetres). As soon as the distance drops below 25 centimetres, the continuous tone will
sound again.
-
If the vehicle approaches an object too fast
-
Starting up and moving away too quickly while PDC is starting
Conditions for switching on and off
PDC is switched on under the following conditions:
-
PDC button pressed (PDC switched on manually), option 508 only
-
Reverse gear engaged (PDC switched on automatically)
PDC is switched off under the following conditions:
-
Reverse gear disengaged, option 507 only
-
PDC button pressed (PDC switched off manually), option 508 only
-
Ignition switched off (PDC switched off automatically
-
After driving approx. 50 metres
-
After exceeding a speed of 30 km/h
When towing a trailer or driving with a rear carrier rack, the acoustic and visual warnings for the rear bumper are
deactivated by the trailer module (AHM).
The trailer or rear carrier rack must be electrically connected.
Operation
SBT Park Distance Control E70, E87, E90, E91, E92, E93, R56
BMW AG - TIS
18.01.2013 18:50
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 7 -
