Tiptronic warning lamp comes on transmission is in emergency mode

Detectable faults: Open circuit/short to ground, short to positive

1) Pull connector off Tiptronic control unit a) Measure resistance between pin 42 and pin 19. Nominal value 6 Ohms ± 2 Ohms b) Check that pins 6 and 19 are free from shorts to ground.

- Check o.k.: Tiptronic control unit faulty

2) Also pull off connector at transmission.

- Check wiring (Tiptronic control unit connector pin 6 to transmission connector pin B and Tiptronic control unit connector pin 19 to transmission connector pin M).

- Wiring o.k.: Pressure regulator faulty. Figs. 1, 8

Fault, fault code Possible causes, elimination, remarks

Test point 12 Tiptronic warning lamp comes on, transmission is in emergency mode.

Selector lever switch/ Detectable faults: Open circuit, short to ground, short to positive transmission ^ Check opera1ion with Tester 9288

Fault code 35

Adjustment of Tester 9288:

Menu: "Input signals" = Selector lever/manual program

Shift through selector lever positions P, R, N, D, 3, 2, 1 one after another.

Compare: Selector lever position

Position indicator in speedometer Position indicator on Tester 9288


Due to its design, the display on Tester 9288 appears with a certain delay - shift through positions sufficiently slowly.

No match: Check wiring according to wiring diagram, check position switch with/without wiring

2) Disconnect Tiptronic control unit connector, with the ignition turned off.

- Check Tiptronic control unit connector pin 26 for ground, using an ohmmeter.

- If no ground is present, refer to wiring diagram distributing point 1 and GP IX.

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