A4 Quattro Wagon L4-2.0L Turbo (BPG) (2005)
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Check the DTC memory after connecting each control unit.
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Replace the control unit following installation of which the malfunction is displayed again.
If the malfunction in the CAN-Bus comfort system is still displayed, there is a problem with the Instrument Cluster Control Module J285 or the Steering
Column Electronic Systems Control Module J527.
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Disconnect the Steering Column Electronic Systems Control Module J527 and connect a different control module (e.g. operating and display
module, Climatronic Control Module J255).
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Check DTC memory of Instrument Cluster Control Module J285 again.
NOTE: The defective control module can be established by disconnecting the Steering Column Electronic Systems Control Module J527 and
connecting a different control module.
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Replace the defective control unit.