Door Contacts

As mentioned in the Central Locking Section, the existing door contacts opened/closed are also an input for the interior lighting function. The E53 uses the Hall effect sensors for the purpose of monitoring door open/closed status (located directly behind the rotary latch plate encased in the actuator). The sensor is activated by the rotary latch plate's position.

• Door closed, the rotary latch plate is in the latched position. Current flow through the hall sensor is < 5 mA.
• Door open, the rotary latch plate is in the open position. Current flow through the hall sensor is > 12 mA.

A change in current flow informs the General module when a door is opened or closed.