Also decisive for a smooth repair is the additional function of the fault reader, which Audi calls the final control element. This means that electrical functions, such as actuating the fuel pump relay, the carbon filter solenoid valve or the idle speed control valve, are also activated by the fault reader.
Thus, it is possible in principle to find out if there is a defect in the wires and whether the device itself is corrected (most often the operation is heard in the absence of engine noise).
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