Adjusting Fuel Level Sender

Information 

• For the Panamera 971, the calibration values from the fuel level sender are backed up in the backend. For calibrating the fuel level sender  , > 9900 - PIWIS Tester 3  must have an online connection.
• Calibration of the fuel level sender is required after replacing the fuel tank or the fuel level sender. After replacing the instrument cluster, the Restore tank sensor calibration values procedure can be carried out. The tank sensor calibration values are retrieved from the backend and stored in the instrument cluster control unit during this procedure. If no fuel sensor calibration values are stored in the backend for the vehicle, the fuel level sender must be calibrated after replacing the instrument cluster. 
• The fuel level sender does not have to be calibrated if the battery is disconnected or if a plug connection on the instrument cluster or fuel level sender is disconnected. The values remain stored in the instrument cluster control unit. 
• A range on remaining fuel of less than 15 km is not displayed in the instrument cluster. 

1. Calibrate the fuel level sender.
   1. 1.1 Empty the fuel tank.

      > 2010EN DRAINING AND FILLING THE FUEL TANK 

   2. 1.2 Check whether an empty fuel level is displayed in the instrument cluster.

      Information 

      After draining or filling the fuel tank, the fuel level sender needs about one minute to react to this. If the new fuel level is not displayed after this time, the calculation of the fuel level can be triggered by releasing, disconnecting, connecting and locking the electric plug connection on the fuel level sender.

   3. 1.3 If necessary, release, disconnect and connect the electric plug connection on the fuel level sender until the lock engages securely in order to trigger the calculation of the new fuel level in the fuel tank.
      1. 1.3.1 Remove right rear seat.

         > WM, 724819 REMOVING AND INSTALLING REAR SEAT - Coupe or WM, 724819 REMOVING AND INSTALLING REAR SEAT - Wagon

      2. 1.3.2 Remove cover -1-  in the floorpan close to the removed right rear seat.

         Courtesy of PORSCHE CARS NORTH AMERICA, INC.

         Cover in floorpan

      3. 1.3.3 Release, disconnect and connect electric plug connections (V8 Diesel: -1-  ; V6 BT, V8 BT: -1-  ) until the locks engage securely.

         Courtesy of PORSCHE CARS NORTH AMERICA, INC.

         Fuel tank connections in opening in floorpan (V8 Diesel)

         Courtesy of PORSCHE CARS NORTH AMERICA, INC.

         Fuel tank connections in opening in floorpan (V6 BT, V8 BT)

      4. 1.3.4 Check whether an empty fuel level is displayed in the instrument cluster.
   4. 1.4 > 9900 - PIWIS Tester 3  must be connected to the vehicle before starting it.
   5. 1.5 Switch on the ignition.
   6. 1.6 Select the required vehicle type.
   7. 1.7 Select Instrument cluster  control unit and press F12 to continue.
   8. 1.8 Press Yes or No to select whether or not you want to create a vehicle analysis log (VAL).
   9. 1.9 Select the Maintenance/repairs  menu.
   10. 1.10 Select Fuel tank calibration  menu and press F12 to continue.
   11. 1.11 Confirm preconditions by pressing F12.
   12. 1.12 In the Select fuel-level sensor  menu, select whether you only want to calibrate fuel-level sensor 1 or both fuel-level sensors and press F12 to continue.
   13. 1.13 Select Fuel tank calibration  menu and press F8 to start.
   14. 1.14 The > 9900 - PIWIS Tester 3  screen displays the message Fuel tank calibration completed successfully.
   15. 1.15 Press F12 to exit.
   16. 1.16 Fill the fuel tank.

       > 2010EN DRAINING AND FILLING THE FUEL TANK 

   17. 1.17 Check whether a full fuel level is displayed in the instrument cluster.

       Information 

       After draining or filling the fuel tank, the fuel level sender needs about one minute to react to this. If the new fuel level is not displayed after this time, the calculation of the fuel level can be triggered by releasing, disconnecting, connecting and locking the electric plug connection on the fuel level sender.

   18. 1.18 If necessary, release, disconnect and connect the electric plug connection on the fuel level sender until the lock engages securely in order to trigger the calculation of the new fuel level in the fuel tank.
       1. 1.18.1 Remove right rear seat.

          > WM, 724819 REMOVING AND INSTALLING REAR SEAT - Coupe or WM, 724819 REMOVING AND INSTALLING REAR SEAT - Wagon

       2. 1.18.2 Remove cover -1-  in the floorpan close to the removed right rear seat.

          Courtesy of PORSCHE CARS NORTH AMERICA, INC.

          Cover in floorpan

       3. 1.18.3 Release, disconnect and connect electric plug connections (V8 Diesel: -1-  ; V6 BT, V8 BT: -1-  ) until the locks engage securely.

          Courtesy of PORSCHE CARS NORTH AMERICA, INC.

          Fuel tank connections in opening in floorpan (V8 Diesel)

          Courtesy of PORSCHE CARS NORTH AMERICA, INC.

          Fuel tank connections in opening in floorpan (V6 BT, V8 BT)

       4. 1.18.4 Check whether a full fuel level is displayed in the instrument cluster.
   19. 1.19 Change terminals.
       1. 1.19.1 Switch off the ignition.
       2. 1.19.2 Wait 30 seconds.
       3. 1.19.3 Switch on the ignition.
   20. 1.20 Check again whether a full fuel level is displayed in the instrument cluster.
   21. 1.21 Install cover -1-  in the floorpan if necessary.
       1. 1.21.1 Position cover -1-  for fitting in the floorpan according to the marking -2-  over groove -3-  .

          Courtesy of PORSCHE CARS NORTH AMERICA, INC.

          Marking on cover and groove in floorpan

       2. 1.21.2 Install cover -1-  in floorpan.

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.

       Cover in floorpan

   22. 1.22 Install right rear seat if necessary.

       > WM, 724819 REMOVING AND INSTALLING REAR SEAT - Coupe or WM, 724819 REMOVING AND INSTALLING REAR SEAT - Wagon