Transmission control module malfunction recognition

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The control module is equipped with a Diagnostic Trouble Code (DTC) memory so that in the event of an electronic/electrical component failure or an open circuit the malfunction can be determined quickly. DTCs are recognized by electrical signals and stored in the DTC memory.

The control module recognizes malfunctions during vehicle operation and stores them in a DTC memory. Refer to DTC table, Diagnostic Trouble Code (DTC) table .

After analyzing the information the control module distinguishes between sporadic malfunctions and malfunctions present at this moment (static) and stores these.

If the malfunction is not present for a predetermined time or when driving over a longer distance, it is no longer recognized and becomes a sporadic malfunction.

A malfunction is also changed to a sporadic malfunction when the DTC memory is not erased after repairs.

Malfunctions which are stored in the memory as sporadically occurring malfunctions, will be displayed as sporadic malfunctions when retrieved by the V.A.G 1551 Scan Tool. "SP" appears on the right of the display in such cases. If the printer is switched on, sporadic malfunctions are printed out after the malfunction is addressed.

If the sporadic malfunction is not present for a predetermined time or when driving over a longer distance, the malfunction is erased in the DTC memory.