Doors - BMW F11 Service Training

F11￿Body.
2.￿Body.
The￿force￿acting￿on￿the￿fiber￿optic￿cable￿causes￿it￿to￿deform￿between￿the￿interference￿structures.
This￿attenuates￿the￿light￿conducted￿by￿the￿fiber￿optic￿cable.￿The￿effective￿force￿is￿proportional￿to￿the
attenuation￿of￿the￿light.￿The￿different￿attenuation￿of￿the￿light￿depending￿on￿the￿mass￿and￿rigidity￿of￿the
colliding￿object￿generates￿a￿characteristic￿signal.
This￿signal￿is￿measured￿by￿the￿sensor￿and￿transferred￿to￿the￿ACMS￿crash￿safety￿module￿over￿a￿data
line.￿The￿ACMS￿crash￿safety￿module￿determines￿from￿this￿data,￿whether￿the￿threshold￿for￿recognition
of￿a￿collision￿with￿a￿pedestrian￿has￿been￿reached￿or￿exceeded￿thereby￿allowing￿a￿decision￿to￿be￿made
to￿activate￿the￿actuators￿on￿the￿engine￿hood.
The￿actuators￿are￿activated￿by￿pyrotechnic￿devices￿raising￿the￿engine￿hood￿using￿the￿spring￿force￿of
the￿integrated,￿pretensioned￿springs.
The￿active￿engine￿hood￿is￿activated￿only￿at￿speeds￿of￿approx.￿20￿-￿50￿km/h.￿For￿safety￿reasons￿the
system￿may,￿in￿rare￿cases,￿activate￿even￿when￿a￿collision￿with￿a￿pedestrian￿cannot￿be￿clearly￿excluded,
e.g.:
• Impact￿with￿a￿barrel￿or￿marking￿post
• Collision￿with￿animals
• Stone￿impact
• Driving￿into￿a￿snow￿drift.
After￿actuation￿of￿the￿active￿engine￿hood￿a￿red￿warning￿triangle￿illuminates￿in￿the￿instrument￿cluster
and￿a￿check￿control￿message￿appears￿in￿the￿central￿information￿display.￿The￿engine￿hood￿can￿then￿be
moved￿back￿to￿its￿initial￿position,￿however￿the￿active￿pedestrian￿protection￿is￿again￿available￿only￿after
component￿replacement.
Returning￿engine￿hood￿to￿initial￿position
• Pull￿engine￿hood￿lever
• Press￿release￿lever￿and￿open￿engine￿hood
• Open￿engine￿hood￿all￿the￿way￿to￿the￿end￿position.
The￿actuators￿on￿the￿engine￿hood￿hinges￿should￿close￿and￿lock￿completely.
• Move￿engine￿hood￿back￿and￿drop￿from￿height￿of￿approx.￿40 cm;￿press￿to￿lock￿completely.
The￿engine￿hood￿should￿catch￿audibly￿on￿both￿sides.
2.3.￿Doors
As￿on￿the￿F01,￿the￿doors￿installed￿on￿the￿F11￿consist￿of￿an￿aluminum￿shell￿construction.
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