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Test step 2
Temperature sensor/sender
Select measuring range on hand-held multimeter V.A.G 1526:
Resistance measurement (20 kω)
- Adapter cable V.A.G 1598/11 connected
Test step V.A.G 1598
socket
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if speci‐
fied value not at‐
tained
2.1 32
and
25
Footwell vent tem‐
perature sender -
G192
- Measure tempera‐
ture at sender fitting
location.
- Governed by the
temperature at the
sensor/pickup fitting
location
- Use current flow di‐
agram to locate and
eliminate short cir‐
cuit, open circuit or
contact resistance.
2.2 31
and
25
Centre vent tem‐
perature sender -
G191
▪ Vehicles with
map-controlled
cooling
Measure tempera‐
ture at sender fitting
location.
=> Table,
Page 64 .
- Replace tempera‐
ture sensor/sender.
Contact in connec‐
tor B contact 11 for
short circuit
▪ Vehicles without
map-controlled
cooling
- ∞ω - Find short to con‐
nector B contact 11
according to current
flow diagram and
eliminate.
Note:
Centre vent temperature sender -G191 is only installed in vehicles with map-controlled cooling.
Select measuring range on hand-held multimeter V.A.G 1526:
Resistance measurement (20 kω)
- Adapter cable V.A.G 1598/11 connected
Test step V.A.G 1598
socket
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if speci‐
fied value not at‐
tained
2.3 33
and
25
Temperature sen‐
sor for fresh air in‐
take duct -G89
- Measure tempera‐
ture at the sensor fit‐
ting location.
- Dependent on the
temperature at the
sensor fitting loca‐
tion => Table, Page
64 .
- Use current flow di‐
agram to locate and
eliminate short cir‐
cuit, open circuit or
contact resistance.
Replace tempera‐
ture sensor.
Select measuring range on hand-held multimeter V.A.G 1526:
Resistance measurement (20 kω)
- Adapter cable V.A.G 1598/12 connected
Test step V.A.G 1598
socket
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if speci‐
fied value not at‐
tained
2.4 8
and
2
Ambient tempera‐
ture sensor -G17
- Measure tempera‐
ture at the sensor fit‐
ting location.
- Dependent on the
temperature at the
sensor fitting loca‐
tion => Table, Page
64 .
- Use current flow di‐
agram to locate and
eliminate short cir‐
cuit, open circuit or
contact resistance.
Replace tempera‐
ture sensor.
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
10.4 - Checking in vehicles with an operating and display unit with one display 63
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