A/T - Tiptronic(R) Function Inoperative/DTC P1753

37 Tiptronic function inoperative (DTC P1753 in TCM)

37 10 07

2018638/4

June 15, 2010

Supersedes Technical Service Bulletin Group 37 number 09-06 dated August 5, 2009 for reasons listed below.





Affected Vehicles





Condition

^ Sporadically, the gear lever electronics become inoperative after switching on the headlight in the gearbox position S (Sport) or Manual (Tiptronic gate). Symptoms are:

^ All segments of the gear display in the combination instrument are illuminated.

^ The manual Tiptronic function is inoperative.

^ DTC P1753 (Tiptronic Switch -F189- implausible signal) is stored in the transmission control module (TCM).

^ After switching the ignition off and on, all functions are operative.

^ The gear level electronics remain operative when the car is in Drive.

Technical Background

Switching on the headlights causes a low voltage, which leads to the failure of the diagnosis signal of the gear lever circuit board. The TCM recognizes a fault in the gear lever electronics and stores DTC P1753.

Production Solution

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Service

Install a new gear lever circuit board (4B0 713 243 E) according to the workshop manual.





Warranty





Required Parts and Tools

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.