A6 Quattro Sedan V6-2.7L Turbo (APB) (2000)
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Leave ignition switched on for 10 seconds. Then check DTC memory of the control module that has just been connected, using the scan tool.
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If the malfunction "Data Bus Powertrain Malfunction" is now indicated, replace the control module which has just been connected.
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If malfunction "Data Bus Powertrain Malfunction" is not indicated, connect next control module, and repeat above procedure.