Parking Assist - Parktronic Sys. Gives Warning With No Obstacle

Parktronic system gives warning with no obstacle

Topic number LI54.65-P-054628

Version 1

Design group 54.65 Parking assist

Date 09-14-2012

Validity Model series 176
from WDD176.xxx1J000474 to WDD176.xxx1J00315

Model series 246
from WDD246.xxx1J070563 to WDD246.xxx1J093326
from WDD246.xxx1N006283 to WDD246.xxx1N016218

X204 facelift (code 803)
from WDC204.9xx1F856898 to WDC204.9xx1F978409 R231
from WDD231.xxx1F005273 to WDD231.xxx1F008708

Reason for change

Complaint:
The Parktronic system gives a collision warning with signal tone although no obstacle is present.

Note:
There is no fault code in the PTS control unit.

Cause:
The installed decoupling ring can cause sound coupling effects between the ultrasonic sensor and the bumper.

Remedy:
Install new decoupling ring on all ultrasonic sensors of the affected bumper.

Note:
When assembling the ultrasonic sensors with the new decoupling rings, make sure that they are correctly seated and centered in the bumper! For this, please refer to the attachment.





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