Preliminary Work
- If a new control unit has to be installed, the values/coding must be read out using PIWIS Tester II 9818 prior to removing the "old" control unit. → 577355 REPLACING FRONT DOOR CONTROL UNIT .
- Disconnect battery ground strap. →
- Remove front door panel. → 705919 REMOVING AND INSTALLING FRONT DOOR PANEL - section on "Removing"