Reading And Writing Values

→ 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 Driver/Passenger seat memory  control unit in the overview  and press [F12] to continue.
4. Select Maintenance/repairs  .
5. Select Control unit replacement  and press [F12].
6. Read data  and press [F12].
7. Press [F8] to start reading out data.
8. Check the chassis number and press [F12].
9. Switch off ignition and replace control unit. → Removing Control Unit For Memory Seat Adjustment 
10. Switch on ignition. Select the Write data  menu (procedure described above), press [F12] and then press [F8] to start installing the data that was read out.
11. The Tester displays the message Data has been written  . Press [F12] to continue.
12. Select Standardize seat motors  . Press [F12] and start by pressing [F8].
13. Follow Tester instructions.
14. The seat automatically moves to various seat positions. If the seat remains stationary for a few minutes, press [F12] to continue.
15. Read out fault memory and, if necessary, erase it.
16. Perform a function test.