S6 V8-4.2L (BBD) (2004)
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Switch ignition off and then on.
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Leave ignition on for 10 seconds. Then, read the DTC memory of the control module you just connected.
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If the DTC "powertrain data-BUS malfunctioning" is displayed, replace the control module you just connected.
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If the DTC "powertrain data-BUS malfunctioning" is not displayed, connect the next control module and repeat the procedure.
