Heated Seats And Seat Ventilation, Checking - Audi Q7 2007 Repair Manual

♦ Perform the function test for the rear window defogger. Use
the Vehicle Diagnostic Tester via the "Guided Fault Finding"
function.
♦ The heated rear window stays switched on at outside temper‐
atures up to 0° C (32° F) until ignition is switched off (heated
rear window can be switched manually at anytime). If temper‐
ature becomes greater than 0° C (32° F) during a driving
period, switch-off of Heated Rear Window occurs after oper‐
ating time stored in the Climatronic Control Module - J255-
front A/C control head has elapsed (approximately 10
minutes).
♦ Once the operated time (approximately 10 minutes) stored in
the Climatronic Control Module - J255- front A/C control head
has elapsed, the heated rear window can be switched off au‐
tomatically by the Climatronic Control Module - J255- front A/
C control head when the exterior temperature is greater than
0º C (activation time depends on the code and the Climatronic
Control Module - J255- front A/C control head version). Use
the Vehicle Diagnostic Tester via the "Guided Fault Finding"
function.
♦ From MY 2011, this vehicle has a Start/Stop System for spe‐
cific engines as optional equipment. On vehicles with Start/
Stop, the rear window defogging can be switched off whenever
the Stop function is active (to protect the Battery - A- ). The
setting for the Rear Window Defogger - Z1- remains stored in
the climatronic control module -J255- . After the engine is star‐
ted again by the Start function, rear window defogging is
switched on again. Use the Vehicle Diagnostic Tester via the
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
"Guided Fault Finding" function.
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
8.3 Heated Seats and Seat Ventilation,
Checking
⇒ "8.3.1 Heated Seats without Seat Ventilation, Checking", page
81
⇒ "8.3.2 Heated Seats with Seat Ventilation, Checking",
page 83
8.3.1 Heated Seats without Seat Ventilation,
Checking
Note
From MY 2011, this vehicle has a Start/Stop System for specific
engines as optional equipment. If the vehicle has the Start/Stop
System, the seat heating and ventilation can be switched off
whenever the Stop function is active (to protect the Battery - A- ).
The setting for the heated seat control (and seat ventilation) re‐
mains stored in the Climatronic Control Module - J255- front A/C
control head. After the engine is started again by the Start func‐
tion, seat heating and ventilation is switched on again. Use the
Vehicle Diagnostic Tester via the "Guided Fault Finding" function.
♦ If there is a condition that prevents the driver or passenger
seat heating from switching on such as a short circuit in the
connection to the seat heating element or an open circuit in
the voltage supply to the Climatronic Control Module - J255-
A/C control head, this will be stored as a fault in the climatronic
control module -J255- front A/C control head. Use the Vehicle
Diagnostic Tester via the "Guided Fault Finding" function.
♦ Perform the function test for the heated seat activation. Use
the Vehicle Diagnostic Tester via the "Guided Fault Finding"
function.
Heating, Ventilation and Air Conditioning - Edition 04.2013
8. Components Actuated by A/C System, Electrical Test
Audi Q7 2007 ➤
81