Sca Subsystem; Tailgate And Rear Window Locks - BMW 5251 Service Manual

SCA subsystem
1. Battery power (term. 30)
2.
Battery power (term. 30)
3.
SCA actuator
4. Ground (term. 31)
5. Feedback OPEN
6. Ground (term. 31)
7. General Module (GM)
8. Trunk contact switch
9. Trunk opening switch
502515990
SCA
operation
Three microswitches are used to operate trunk latching sys-
tem.
Microswitch mounted on lock cylinder. Pushing lock cylin-
der in will signal GM to activate actuator and open trunk.
Q
Microswitch in actuator signals GM when trunlc has re-
leased. Actuator shuts off.
When closing trunk, third microswitch (on trunk latch) sig-
nals GM to activate actuator. Cam turns to pull lid closed.
Foroverload protection, ON duration of actuator is limited to a
max. 5 seconds.
Emergency opening of trunk is provided by a mechanical link
from the lockcylinder. If the trunlc has been opened by the
emergency release, it can be reclosed as a conventional lid
with normal pressure.
Tailgate and rear window locks
The Sport Wagon tailgate can be opened from:
0
Remote lkey (FZV)
Interior tailgate release button at driver's lkick panel
Unlock microswitch above rear license plate