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Removing and installing display and operator control unit (PCM): Notes

NOTE:
  • In the instrument cluster of the 911 Turbo, the tolerance of the speed display has been restricted. This was achieved by changing the software ("K-number") on the instrument cluster and PCM control module. The "K-number" varies depending on vehicle type and country equipment.
  • The reason is as follows: different displays of the total mileage and the fuel consumption/average consumption in the instrument cluster and the PCM control module.
  • Therefore, in the case of repairs, the K-number in the PCM control module must be corrected with the Porsche System Tester 2 (PST2) after the installation of a new PCM control module or a new instrument cluster in vehicles as of model year '01. > If this correction is not carried out, conflicting values for the total mileage and fuel consumption/average consumption will be displayed on the instrument cluster and the PCM control module when in driving mode.

PROCEDURE for changing the "K-number" on PCM control module (as of PST2 Software 13.0): 

  1. Connect the PST2 to the diagnostic socket; switch on the PST2 and the ignition.
  2. When the PST2 is ready, select vehicle type and start the automatic control module search with the key ">>".
  3. In the menu "Control units", select Instrument cluster 
  4. In the function selection, select Synchronise K-number  .
  5. Start the function using the key ">>".
  6. After the function has been successfully performed in the instrument cluster, the message K-number synchronised  or the message K-number updated  appears in the Tester display. Subsequently, it is automatically connected to the PCM. The message Connecting to PCM  appears.
  7. After the function has been successfully performed in the PCM, the message K-number synchronised  or the message K-number updated  appears in the Tester display. Subsequently, it is automatically reconnected to the instrument cluster. The message Connecting to instrument cluster  appears.
  8. Then the message Function successfully completed  appears.
  9. Return to the Start menu with the button "ESC", switch off the PST2 and disconnect from the diagnostic socket.
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