Removing and installing rear air recirculation flap control motor V421 — AUDI

Removing and installing
rear air recirculation flap control motor
V421
The
V421
is only fitted on vehicles with a
“Mix”
or
“High”
air conditioner.
Note
The air conditioning for the Audi Q7 is available in different versions, depending on the vehicle equipment. Check the correct version and compatibility of the different components
Chapter
and
Electronic parts catalogue
.
This control motor is only fitted on vehicles with a rear heater and air conditioning unit (not fitted on vehicles with a rear air distribution housing).
Currently all the control motors on this vehicle are identical. While you are performing the basic setting, the control motors are assigned and adapted in accordance with the series connection of the wiring. If the sequence is not as specified, the control motors will not be adapted properly and the flaps will not be controlled correctly
Chapter
“
Overview of control motors of air conditioner
”
.
After installing the control motor, perform air conditioner basic setting
Vehicle diagnostic tester
in
“Guided Fault Finding”
mode.
If necessary, activation of the electrical components of the air conditioner can be checked by way of the
“Final control diagnosis”
and
“Basic setting”
functions (e.g. to check for interchange)
Vehicle diagnostic tester
in
“Guided Fault Finding”
mode.
After installing a new control motor, check activation by the
rear Climatronic operating and display unit
E265
and operation of the control motor
Vehicle diagnostic tester
in
“Guided Fault Finding”
mode.
Removal of this control motor involves taking out the entire centre console including the base plate
A
of the centre console and the insulating mat
B
fitted between the base plate and the rear heater and air conditioning unit
C
General body repairs, interior
Rep. gr.
68
Centre console; Exploded view - centre console
.
Special tools and workshop equipment required
Strong carpet knife (blade firmly and securely seated in handle)
Removing
Switch off ignition.
Remove the base plate
A
of the centre console and the insulating mat
B
General body repairs, interior
Rep. gr.
68
Centre console; Removing and installing centre console bracket
.
Use a sharp knife (e.g. a strong carpet knife with the blade firmly and securely attached in the handle) to separate the cover grille
A
from the air ducts
C
at the marked joints
B
.
Caution
The air conditioner will not function properly if control motors and/or the corresponding connectors are interchanged
Chapter
“
Overview of control motors of air conditioner
”
.
The control motors and connectors are identical. If these are incorrectly installed or connected, the corresponding flaps can no longer be properly matched and/or activated.
Mark control motors and connectors clearly before detaching or removing to prevent incorrect installation.
Mark the connector
A
and the control motor
C
(to prevent interchange if several connectors are simultaneously unplugged).
Unplug connector
A
.
Remove bolts
B
.
Detach the control motor
C
from the actuating arm
D
.
Installing
Installation is carried out in the reverse order; note the following:
Caution
Turning the mount
E
of the control motor
C
by hand with the connector
A
unplugged may damage the electronics in the control motor.
Always turn the mount
E
of the control motor
C
carefully and slowly with the connector
A
plugged in and only to the extent required for installation.
Note
The actuator socket
E
in the control motor
C
can only be fitted onto the actuating arm
D
in one position. If the mount of the control motor
E
is positioned such that it cannot be fitted to the actuating arm
D
, it may be necessary to use a suitable screwdriver for example to carefully turn the mount in the control motor
C
until the two components can be joined without applying force.
If the mount
E
of the control motor
C
is not in the position shown (the only position in which the connection piece can be attached), plug in the connector
A
at the control motor and carefully turn the mount of the control motor
C
into the position in which the two components can be joined without tensioning.
The mount
E
of the control motor
C
has no stop. It rotates permanently if the control motor is activated. A control motor should therefore not be activated after it has been detached.
Check the actuating arm
D
and the mount
E
of the control motor
C
. They must be properly aligned for assembly.
Check that the actuating arm
D
and connecting elements
G
have been installed in the correct position.
Attach the mount
E
of the control motor
C
to the actuating arm
D
.
Check the connection between the control motor
C
and the actuating arm
D
. There must not be any play.
Tighten bolts
B
.
Plug in connector
A
.
Lay the wiring harness
F
such that it cannot come into contact with moving components.
Engage
arrow
the cover grille
A
at the mounts
D
of the air ducts
C
and secure with the bolts
B
Electronic parts catalogue
.
Check the routing of the wiring harness
E
to the connector
F
. It must not come into contact with moving components.
Perform basic setting and final control diagnosis for the air conditioner
Vehicle diagnostic tester
in
“Guided Fault Finding”
mode.
Note
The control motors on this vehicle are equipped with electronics. A new control motor only learns its position at the heater and air conditioning unit in the course of basic setting and can then be activated by the
rear Climatronic operating and display unit
E265
(all control motors are identical at present)
Vehicle diagnostic tester
in
“Guided Fault Finding”
mode.
While you are performing the basic setting, the control motors are assigned and adapted in accordance with the series connection of the wiring. If the sequence is not as specified, the control motors will not be adapted properly and the flaps will not be controlled correctly
Chapter
“
Overview of control motors of air conditioner
”
.
Interrogate the event memory of
E265
and
E87
and erase any faults displayed
Vehicle diagnostic tester
in
“Guided Fault Finding”
mode.