Audi Q7 2007 Repair Manual page 58

Audi Q7 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 04.2013
The coolant shut-off valve -N82-
♦
is activated by the Climatronic
Control Module - J255- front A/C
control head (via the Engine
Coolant Shut-Off Valve Relay -
J541- ), when no heat is desired
in the passenger compartment.
Refer to Wiring diagrams, Trou‐
bleshooting and Component lo‐
cations. Use the Vehicle Diag‐
nostic Tester via the "Guided
Fault Finding" function.
The Heater Coolant Shut-Off
♦
Valve - N82- is activated by the
Auxiliary Heater Control Module
- N279- when requested by the
climatronic control module -
J255- on vehicles with the op‐
tional "parking heater" and a
motor on which a coolant shut-off
valve -J255- would be activated
(observe the parking heater
adaptation). Use the Vehicle Di‐
agnostic Tester via the "Guided
Fault Finding" function.
17 - Water Pump - V36-
❑ Only installed on vehicles with 6-cylinder gasoline engine
❑ Check the functionality. Refer to
❑ Removing and installing. Refer to ⇒ Engine Mechanical; Rep. Gr. 19 ; Coolant Pump and Thermostat;
Coolant Pump, Removing and Installing .
Note
On vehicles with the "parking
♦
heater" optional equipment, the
Coolant Recirculation Pump -
V50- is also installed on vehicles
with 6-cylinder gasoline engine.
Refer to ⇒ Parking/Auxiliary
Heater; Rep. Gr. 82 .
The Water Pump - V36- is cur‐
♦
rently installed at rear on the en‐
gine (between cylinder head and
plenum chamber front wall). Re‐
fer to ⇒ Engine Mechanical;
Rep. Gr. 19 ; Coolant Pump and
Thermostat; Coolant Pump, Re‐
moving and Installing .
18 - End of Refrigerant Lines to Evaporator in Rear Heating and A/C Unit
❑ Only present in vehicles with a rear A/C unit (optional equipment)
WARNING
♦ Bolts of the connection
points must only be loos‐
ened when refrigerant
circuit has been dis‐
charged.
❑ For loosening connection points of refrigerant lines, refer to
⇒ "15.8 Connection Points of Refrigerant Lines, Loosening and Assembling ", page 262
52
Rep. Gr.87 - Air Conditioning
⇒ "14 Heating Performance of A/C System, Checking", page 231
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with respect to the correctness of information in this document. Copyright by AUDI AG.
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