Removing and installing refrigerant pressure and temperature sender G395 — AUDI

Removing and installing
refrigerant pressure and temperature sender
G395
Note
Only installed on certain vehicles with a high-voltage system
Chapter
“
System overview - refrigerant circuit, vehicles with high-voltage system
”
WARNING
Danger from escaping pressurised refrigerant.
Frostbite on skin and other parts of the body.
Extract the refrigerant and then immediately open up the refrigerant circuit.
Extract the refrigerant again if more than 10 minutes have passed since the initial extraction and the refrigerant circuit has not been opened up. Renewed evaporation leads to the build-up of pressure in the refrigerant circuit.
Note
Specific tools are required for discharging the refrigerant circuit; such work may only be be performed by appropriately qualified personnel
Air conditioner with refrigerant R134a
Rep. gr.
87
Refrigerant circuit
(Air conditioner with refrigerant R134a; Refrigerant circuit; Working with the air conditioner service station).
Removing
Discharge refrigerant circuit
Air conditioner with refrigerant R134a
Rep. gr.
87
Refrigerant circuit
(Air conditioner with refrigerant R134a; Refrigerant circuit; Working with the air conditioner service station).
Remove bumper cover (front)
General body repairs, exterior
Rep. gr.
63
Bumper (front)
; Exploded view - bumper (front).
Unplug electrical connector
2
.
Check refrigerant line and connection
4
for dirt; clean if necessary.
Note
Should it not be possible to unplug the electrical connector
2
or unfasten the sender
1
due to the confined installation space, detach the refrigerant line from the condenser
Chapter
.
Caution
Danger from escaping pressurised refrigerant if
G395
is removed with refrigerant circuit not completely empty
Frostbite on skin and other parts of the body.
Always discharge refrigerant circuit before removing sender
G395
1
; connection
4
has no valve
Air conditioner with refrigerant R134a
Rep. gr.
87
General notes on air conditioning systems
.
Loosen and remove sender
1
.
Seal off open connection
4
with a clean plug from
engine bung set
VAS 6122
.
Installing
Installation is carried out in the reverse order; note the following:
Check connection
4
for dirt or damage; clean or renew if necessary.
Tightening torque
Chapter
“
Exploded view - condenser, air conditioner compressor, refrigerant lines and expansion valve
”
(Electrically driven air conditioner compressor, refrigerant lines, high-voltage battery heat exchanger)
Note
Renew O-ring
3
Chapter
. For correct version refer to
Electronic parts catalogue
.
Evacuate and charge refrigerant circuit
Air conditioner with refrigerant R134a
Rep. gr.
87
Refrigerant circuit
(Air conditioner with refrigerant R134a; Refrigerant circuit; Working with the air conditioner service station).
Start up air conditioner after charging refrigerant circuit
Chapter
.
As a final step, interrogate event memory and erase any entries displayed
Vehicle diagnostic tester
(
“Guided Fault Finding”
).