General Repair Information; General Information - Audi Q7 2007 Repair Manual

Audi Q7 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 04.2013
2

General Repair Information

⇒ "2.1 General Information", page 6
⇒ "2.2 Information for Vehicles with and without Parking/Auxiliary
Heater (if Heat Output is Poor)", page 6
⇒ "2.3 OBD and A/C System, Checking", page 9
⇒ "2.4 Information for Vehicles with Start/Stop System ",
page 10
2.1

General Information

DANGER!
Before working on electrical system (wiring), remove relevant
fuse(s).
Note
Before performing electric welding on the vehicle, disconnect the
battery. ⇒ Electrical Equipment; Rep. Gr. 27 ; Battery; Battery,
Disconnecting and Connecting
Refrigerant circuit of A/C system must not be discharged and
opened (refer to ⇒ "1.4 Refrigerant Circuit, Draining", page 3
unless this is necessary because of safety precautions (refer to
⇒ "1 A/C and Refrigerant Safety Precautions", page 2
components of the refrigerant circuit of the A/C system have to
be to replaced.
The air conditioner refrigerant circuit is not to be opened when
performing all other standard vehicle repair operations.
Servicing operations that can be performed on the heating and
air conditioning system without opening the refrigerant circuit are
described in this repair manual. Refer to
⇒ "3 Refrigerant Circuit", page 12
Note
The connections for the sensors/switches mentioned in this repair
manual are not always equipped with a valve. Valve closes au‐
tomatically when unscrewing the switch, therefore only switches
on which the connection is equipped with a valve maybe replaced
when the refrigerant circuit is charged.
This repair manual also describes service procedures that require
the refrigerant circuit to be emptied, even though they cannot be
performed in every workshop (refer to
⇒ "15 Refrigerant Circuit, Servicing", page 241
frigerant circuit, bring the vehicle to a workshop that has the
necessary tools and qualified personnel. Refer to ⇒ Refrigerant
R134a Servicing; Rep. Gr. 87 ; A/C System General Informa‐
tion .).
2.2 Information for Vehicles with and with‐
out Parking/Auxiliary Heater (if Heat
Output is Poor)
♦ If a customer complains that the their gasoline vehicle without
an auxiliary heater has poor heating, check the heating per‐
6
Rep. Gr.87 - Air Conditioning
) or unless
.
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) (to drain the re‐
)