Removing and installing rain and light sensor G397, vehicles with front camera for driver assist systems — VW

Removing and installing
rain and light sensor
G397
, vehicles with front camera for driver assist systems
Note
The rain and light sensor has a silicon layer (coupling pad) which forms the contact surface to the windscreen.
The rain and light sensor has been designed so that it can be used again. A prerequisite for re-use is that the coupling pad is not damaged or dirty (check!).
If a
rain and light sensor
G397
is renewed with a
rain and light sensor
G397
having a different part number, the new
rain and light sensor
G397
has to be coded
Anchor
.
The
rain and light sensors
G397
cannot be fitted arbitrarily. Determine the correct
rain and light sensor
G397
using the Electronic Parts Catalogue.
Removing
Switch off ignition and all electrical consumers.
If fitted, disengage ignition key out in position 0 (forward notch).
Remove cover
1
in direction of arrow
A
.
Note
Wait at least 1 minute after releasing the retaining clip. This is necessary to ensure that the silicone coating is relieved of tension and will not be damaged during removal.
Release retaining clip on left and right
arrows
.
Carefully lever out
rain and light sensor
G397
1
from retaining frame on windscreen, starting from the top.
Release and pull off connector
1
and remove
rain and light sensor
G397
2
.
Caution
Until the time comes to reinstall it, store removed
rain and light sensor
G397
in a place where the coupling pad cannot be damaged or soiled from dust, etc.
Installing
Install in the reverse order of removal, observing the following:
Caution
Prior to installation, thoroughly clean the surface of the windscreen within the retaining frame for
rain and light sensor
G397
. Make sure to completely remove any remains of the coupling pad adhering to the windscreen.
The surface (coupling pad) of the
rain and light sensor
G397
must not be soiled on installation. A sensor with a damaged coupling pad must be renewed
Chapter
.
Note
If the surface of the coupling pad on the
rain and light sensor
G397
is soiled, it may be possible to clean it by
“sticking on”
and then
“pulling off”
one or more adhesive strips.
Clean windscreen in the area of the retaining plate thoroughly.
If necessary, remove protective cap
1
from new
rain and light sensor
G397
.
Press grip in direction of arrow
A
.
Remove protective cap
1
in direction of arrow
B
.
Reconnect connector.
Insert
rain and light sensor
G397
1
into retaining frame on windscreen.
Push retaining clip on both sides
arrows
so that it can be heard to engage.
Note
Even when sensor is installed correctly, small air bubbles may first appear between windscreen and coupling pad. After approx. 10 minutes, the contact surface must be free of bubbles.
If the contact surface is not free of bubbles after 10 minutes, the
rain and light sensor
G397
must be removed and installed anew.
Air bubbles between the windscreen and coupling pad can lead to malfunction of the
rain and light sensor
G397
.
Read event memory and delete sporadic faults of the rain sensor
Vehicle diagnostic tester
.
Note
With the rain sensor disconnected, opening the door, for example, can wake up the CAN bus. The sporadic event entries in the onboard supply control unit must be deleted following repair work.
If
rain and light sensor
G397
was replaced, perform coding
Anchor
.
Coding the
rain and light sensor
G397
.
Connect vehicle diagnostic tester
Chapter
.
Coding
rain and light sensor
G397
Vehicle diagnostic tester
.