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Locking Button on Vehicle Doors
All four doors can be locked mechanically, by using the separate locking buttons.
If the button on the door is depressed, then the inner door handle of the door to be
unlocked must be pulled twice to unlock the vehicle door.
In this situation the Junction Box Electronics Control Module does not activate the cen-
tral locking.
Opening the Trunk Lid
The trunk lid can be unlocked via the remote control, the identification transmitter, the
outer or inner trunk lid release button.
Opening with Remote Control/Identification Transmitter
The trunk lid is opened with the remote control/identification transmitter by pressing on
the trunk lid symbol. The trunk lid opens irrespective of whether the vehicle is locked or
not.
The motor in the lock of the trunk lid is activated via a power output stage in the JBE in
order to open the trunk lid.
Opening with the Outer Trunk Lid Button
As soon as the vehicle is unlocked, the trunk lid can be opened by pressing the outer
trunk lid button.
The microswitch switches to ground when the outer trunk lid button is pressed.
The JBE monitors the microswitch. The trunk lid is unlocked and opened when the sig-
nal from the microswitch goes to low.
Opening with the Inner Trunk Lid Button
As soon as the vehicle is unlocked, the trunk lid can be opened by pressing the inner
trunk lid button.
The inner trunk lid button is installed on the A-pillar on the driver's side. It switches to
ground. The microswitch is routed directly to the CAS2. As soon as the signal of the
microswitch goes to low, the CAS2 sends this status to the JBE. In turn, the JBE acti-
vates the motor in the lock of the trunk lid.
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E90 General Vehicle Electrical
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