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Test step "8” > < Checking activation signal for air conditioning system compressor regulating valve N280

A4 Cabriolet Mk2

Test step “7”
Test step “7”
Sunlight penetration photosensor -G107-
  Note
t  There are different versions of the operating and display unit, Climatronic control unit -J255- and the sunlight penetration photosensor -G107-. Attention must therefore be paid to the exact assignment when replacing an operating and display unit → Parts List.
t  As of chassis number “400000” in Model Year 2005 (Saloon and Avant) and “012913” in Model Year 2005 (Cabrio) → Part catalogue, vehicles have been fitted with a modified sunlight penetration photosensor -G107- and a modified operating and display unit, Climatronic control unit -J255-. Operating and display units, Climatronic control unit -J255- with part no. index up to “AH” are only to be fitted with the sunlight penetration photosensor -G107- with part no. 8E0 907 539. Operating and display units, Climatronic control unit -J255- with part no. index “AJ” onwards are only to be fitted with the sunlight penetration photosensor -G107- with part no. 8P0 907 539 → Parts List.
t  In the event of incorrect assignment between the sunlight penetration photosensor -G107- and the operating and display unit, Climatronic control unit -J255-, the operating and display unit, Climatronic control unit -J255- cannot evaluate the signal from the sunlight penetration photosensor -G107- and there will be problems with air conditioner control.
   
Vehicle diagnostic, testing and information system -VAS 5051A-, measurement mode: Multimeter, voltage measurement (20 VDC)
l  Adapter cable -V.A.G 1598/11- connected
Test stepTest box -V.A.G 1598A- socketChecking of
l  Test conditions
–  Additional operations
SpecificationMeasures to be taken if reading does not match specification
7.14
+
earth → Note		Wiring to sunlight penetration photosensor -G107-
l  Ignition on
t  Less than 2 V
–  Use current flow diagram to locate and eliminate short to positive
7.23
+
earth → Note		Wiring to sunlight penetration photosensor -G107-
l  Ignition on
t  Less than 2 V
–  Use current flow diagram to locate and eliminate short to positive

1)  Earth is applied to connector “D”, contact “13”.
   
Vehicle diagnostic, testing and information system -VAS 5051A-, measurement mode: Multimeter, resistance measurement (20 kΩ)
l  Adapter cable -V.A.G 1598/11- connected
Test stepTest box -V.A.G 1598A- socketChecking of
l  Test conditions
–  Additional operations
SpecificationMeasures to be taken if reading does not match specification
7.33
+
earth → Note		Wiring to sunlight penetration photosensor -G107-
l  Ignition on
t  ∞ Ω
–  Use current flow diagram to locate and eliminate short to earth
7.44
+
earth → Note		Wiring to sunlight penetration photosensor -G107-
l  Ignition on
t  ∞ Ω
–  Use current flow diagram to locate and eliminate short to earth

2)  Earth is applied to connector “D”, contact “13”.
   
Vehicle diagnostic, testing and information system -VAS 5051A-, measurement mode: Multimeter, voltage measurement (20 VDC)
l  Adapter cable -V.A.G 1598/12- connected
Test stepTest box -V.A.G 1598A- socketChecking of
l  Test conditions
–  Additional operations
SpecificationMeasures to be taken if reading does not match specification
7.51
+
13		Wiring to sunlight penetration photosensor -G107-
l  Ignition on
t  Less than 2 V
–  Use current flow diagram to locate and eliminate short to positive
7.616
+
13		Wiring to sunlight penetration photosensor -G107-
l  Ignition on
t  Less than 2 V
–  Use current flow diagram to locate and eliminate short to positive

   
Vehicle diagnostic, testing and information system -VAS 5051A-, measurement mode: Multimeter, resistance measurement (20 kΩ)
l  Adapter cable -V.A.G 1598/12- connected
Test stepTest box -V.A.G 1598A- socketChecking of
l  Test conditions
–  Additional operations
SpecificationMeasures to be taken if reading does not match specification
7.71
+
13		Wiring to sunlight penetration photosensor -G107-
l  Ignition on
t  ∞ Ω
–  Use current flow diagram to locate and eliminate short to earth
7.816
+
13		Wiring to sunlight penetration photosensor -G107-
l  Ignition on
t  ∞ Ω
–  Use current flow diagram to locate and eliminate short to earth

   

Test step "8” > < Checking activation signal for air conditioning system compressor regulating valve N280