Removing and installing rain and light sensor G397, vehicles without front camera for driver assist systems — VW

Removing and installing
rain and light sensor
G397
, vehicles without 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!).
The
rain and light sensor
G397
can be repaired if necessary
Chapter
.
If a rain sensor is renewed and has to be replaced by a rain sensor with another part number, the rain sensor must be coded
Anchor
.
The rain sensors cannot be installed optionally. Determine which rain sensor is the right one by referring to Electronic Parts Catalogue.
Removing
Switch off ignition and all electrical consumers.
Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.
Remove interior mirror
General body repairs, interior
Rep. gr.
68
Interior mirror; Removing and installing interior mirror
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 and disconnect connector
1
.
Release retaining clip on left and right
arrows
.
Starting from bottom, carefully lever
rain and light sensor
G397
1
off retaining frame on windscreen.
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
Installation is carried out in the reverse order. When installing observe the following:
Caution
Prior to installation, thoroughly clean the surface of the windscreen inside the retaining frame for
rain and light sensor
G397
. Make sure to completely remove any remains of 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 damaged coupling pad must be renewed.
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 within 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
.
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.
Connect connector and engage it.
Note
Even when
rain and light sensor
G397
is installed correctly, small air bubbles may initially 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 the coupling pad will cause the
rain and light sensor
G397
to malfunction.
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 the
rain and light sensor
G397
was renewed, perform coding
Anchor
.
Coding the
rain and light sensor
G397
.
Connecting
vehicle diagnostic tester
Chapter
Coding
rain and light sensor
G397
Vehicle diagnostic tester
.