A4 Sedan V6-3.2L (BKH) (2007)
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Start the engine.
‹› All connections on the Climatronic control module ( J255) A/C control head must be attached.
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Measure the voltage between contact "8" in connector - C - (to the heated windshield control module (J505 )) and contact "16" in connector - D -
(ground connection).
‹› Target value: Approx. battery voltage
‹› If a voltage is measured as less than 5 V, the heated windshield control module (J505) is currently not ready to activate heating of the windshield
or there is a short circuit to ground in the connection to the heated windshield control module (J505). Refer to => [ Heated Windshield Function ]
See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General Diagnostics/Heated Windshield.
‹› If a voltage between 5 V and 8 V is measured, the Climatronic control module (J255) A/C control head activates the heated windshield control
module (J505) which activates heating of the windshield.