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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 9 >> Possible causes, elimination, notes

Possible causes, elimination, notes

NOTE: The function of the coolant shutoff valve can be tested with the Porsche System Tester 2 (Drive links/Coolant shutoff valve).
  1. Test valve with the Tester.
  2. Check internal resistance of the valve. To do this, pull off plug connection on the valve and connect ohmmeter to pin 1 and pin 2.

    Nominal value: 25-35 ohm

  3. Check wire from the Tiptronic control module connector pin 51 to the coolant shutoff valve connector pin 1 for open circuit, short to ground and short to B+.
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