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Home >> Porsche >> 2000 >> Boxster Base, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission Controls, Case - Diagnosis >> Tiptronic diagnosis >> Fault overview >> Test point 15 >> Possible causes, elimination, notes

Possible causes, elimination, notes

NOTE: The ratio of transmission input speed/engine speed is monitored.
  1. Test sender for the transmission input speed on Tiptronic control module connector pin 16 and pin 44 with an ohmmeter.

    Nominal value: 230 ... 300 ohm

  2. Check wiring from control module pin 16 (or 44) to the 16-pole transmission connector pin 5 (or 6) for open circuit, short to ground and short to B+.
  3. Check shield on control module connector pin 23.
  4. Check sender on transmission socket pin 5 and pin 6 with an ohmmeter.

    Nominal value: 230 ... 300 ohm

    NOTE: The hydraulic control unit must be removed before the sender can be replaced.
  5. If items 1 ... 4 are OK and no other faults are stored, there is a mechanical/hydraulic fault in the transmission (e.g. ATF level not OK, defective converter, slipping clutches or brakes.)
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