Programming Control Unit For Four-Wheel Drive

→ 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 additions may appear in PIWIS Tester II 9818  .

1. PIWIS Tester II 9818  must be connected to the vehicle and ignition switched on.
2. Select the vehicle type and start the PIDT.
3. Select PTM  and Maintenance/repairs  with the cursor keys and press [F12].
4. Select Control unit replacement  with the cursor keys and press [F12].
5. Select Read data  (vehicle data) with the cursor keys and press [F12].
6. The message Data was read out  appears on the Tester screen. Press [F12] to continue.
7. Switch off ignition and replace control unit.
8. Switch to the Additional menu  and perform vehicle handover  by pressing [F8].
9. Select Erase all fault memories  in the menu and press [F12] to start.
10. Carry out automatic search of control units.
11. Go to the Control unit replacement  menu, select Write data  and press [F8] to start. The data that was read out is now loaded.
12. The System Tester displays the message Data has been written  . Press [F12] to continue.
13. Change to the Coding  menu, compare the coding with the vehicle equipment and re-code if necessary.
    1. 13.1. Select the vehicle type  . Press [F12] to continue and press [F8] to start coding.
14. Exit the menu, carry out a test drive, and read out the fault memory.