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A4 Cabriolet Mk2

Wiring to fresh air blower control unitJ126
   
Wiring to fresh air blower control unit -J126-
Vehicle diagnostic, testing and information system -VAS 5051A-, measurement mode: Multimeter, resistance measurement (20 kΩ / 200 kΩ)
l  Adapter cable -V.A.G 1598/11- and 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
3.25
+
connector to fresh air blower control unit -J126- contact “2”		Open circuit in wiring between operating and display unit, Climatronic control unit -J255- and fresh air blower control unit -J126- 
t  Less than 5 Ω
–  Locate and eliminate open circuit in wiring between fresh air blower control unit -J126- and operating and display unit, Climatronic control unit -J255-
3.36
+
connector to fresh air blower control unit -J126- contact “1”		    

   
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
3.45
+
13		Open circuit in wiring between operating and display unit, Climatronic control unit -J255- and fresh air blower control unit -J126-
l  Ignition on
l  Connector of fresh air blower control unit -J126- unplugged
t  Less than 1 V
–  Use current flow diagram to locate and eliminate short to positive
3.56
+
13		    
3.65
+
12		  
t  Less than 1 V
–  Use current flow diagram to locate and eliminate short to earth
3.76
+
12		    

   

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