October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Inertia Switch

In the event of an impact registering at greater than 14G the Inertia Switch goes open. This open removes the voltage from X254 pin 21 at the BC1(J3 54-pin Natural connector). The trigger of the inertia switch causes the BC1 to unlock doors.

Fig 1: Identifying Central Lock Circuit Diagram

Courtesy of BMW OF NORTH AMERICA, INC.