Adjusting Fuel Level Sender

NOTIFICATION 

Coding/programming will be aborted in the event of undervoltage. 

• Increased power consumption during diagnosis can cause a drop in voltage, which can result in one or more fault entries and abortion of the coding process. 
  1. → Before commencing work, connect a suitable battery charger with a charging current of at least 90 A to the jump-start terminals in the engine compartment.

NOTIFICATION 

Programming/coding will be aborted if the WiFi connection is unstable. 

• An unstable WLAN connection can interrupt communication between PIWIS Tester 3 and the vehicle communication module (VCI). As a result, coding/programming may be aborted. 
  1. → During control unit programming/coding, always connect PIWIS Tester 3 to the vehicle communication module (VCI) via the USB cable.

Information 

The fuel level sender must be adjusted after carrying out the following work:

• Replacing fuel tank 
• Replacing fuel level sender 
• Replacing instrument cluster (only if the Read out values function could not be performed) 

1. Connect the PIWIS Tester  to the vehicle.
2. Select Instrument cluster  in the control unit overview and press >> or F12 to confirm your selection.
3. Select the Maintenance/repairs  menu.
4. Select the Fuel tank calibration  function and press >> or F12 to confirm your selection.
5. Select the Fuel-level sensor calibration  function and press F8 to start.
6. The message Fuel tank calibration completed successfully  appears on the Tester screen.
7. Press F12 to exit.
8. Disconnect the PIWIS Tester  from the vehicle.