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Home >> Porsche >> 2012 >> Panamera Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> 90 - Instruments -- PANAMERA (970) >> WM 902555 Replacing Instrument Cluster (Except PANAMERA S Executive, PANAMERA 4 S Executive, PANAMERA Turbo Executive, PANAMERA GTS) >> Reading And Writing Values

Reading And Writing Values

NOTE: Voltage drop
  • Risk of irreparable damage to control unit
  • Risk of damage to control unit
  • Fault entries in the control unit
  • Coding in the control unit is aborted
  • Malfunctions in control unit, even during programming

→ Prior to disconnecting the control unit, switch off ignition and remove ignition key.

→ Ensure that the power supply is not interrupted during programming.

→ Connect a battery charger with a current rating of at least → Nominal value: 40 A  to the vehicle battery.

Information 

The PIWIS Tester II 9818  instructions take precedence since the description may be different with later Tester releases.

The procedure described here has been structured in general terms. Different text or additional information may appear in PIWIS Tester II 9818  .

  1. Connect the PIWIS Tester to the vehicle and start the Tester. Switch on ignition.
  2. Select the vehicle type and start the diagnostic application.
  3. Select the required control unit Instrument cluster  in the overview  .
  4. Select Maintenance/repairs  .
  5. Select the function Save fuel level sensor comparison values to rear-end electronics control unit  and press [F12].
  6. Follow instructions on the Tester. Press [F8] to start saving the values.
  7. The fuel level sensor values are saved. Press [F12].
  8. Select Control unit replacement  and press [F12].
  9. Select Read data  and press [F12].
  10. Press [F8] to start reading out data.
  11. Check the chassis number and press [F12].
  12. Document the total distance and fuel level.
  13. Switch off ignition and replace control unit. → 902519 REMOVING AND INSTALLING INSTRUMENT CLUSTER .
  14. Switch on ignition and select Instrument cluster  control unit.
  15. Select the Extended identification  menu.
  16. Select Vehicle identification number  and enter the VIN, then press "Enter" to confirm your entry.
  17. Select Maintenance/repairs  menu, Control unit replacement  and Write data  , then press [F12] and press [F8] to start. The data that was read out is installed.
  18. The System Tester displays the message Data has been written  . Press [F12] to continue.
  19. [F11] must be pressed before selecting Maintenance/repairs  and the function Restore fuel level sensor comparison values from the rear-end electronics control unit  . Then press [F12].
  20. Read the warnings on the Tester and press [F8] to start the process.
  21. The fuel level sensor values are restored. Press [F12].
  22. Select the Set total mileage  function and press [F12].
  23. Read the warning on the Tester and press [F12].
  24. Select the total distance and enter the value that was read out in Step  12. Then press "Enter" to confirm your entry and press [F8] to write data.
  25. Select Coding  , Automatic coding  to perform coding in accordance with the instructions on the Tester.
  26. Read out the fault memory  and erase it if necessary.
  27. Return to the overview  of control units.
  28. Check the function of the instrument cluster and fuel level gauge during the test drive.
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