Technical Service Bulletins

Trans Needs a Brain Tweak

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Trans Needs a Brain Tweak

This bulletin applies to 2011 Audi A8 vehicles, where the technician finds DTCs P1703 (emergency operation gearbox, reset control unit in diagnosis 02 – gearbox) or U111 (restricted function because of missing message in diagnosis address 81 – gear lever) after reading TCM fault memory.

If the memory is read with Guided Fault Finding or if immobilizer test plans are performed, these DTC entries may be stored. This is due to a communication error between VAS tester and the transmission control unit (this happens particularly with tester VAS 5051B).

New software in the transmission control module (J217) addresses this condition.

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