BMW F12 2011, Technical Training Manual, Page: 36 / 68

F12�Chassis�Dynamics
4.�Brakes
32
Brake�test�stand�detection
The�EMF�control�unit�determines�via�a�plausibility�check�(comparison�of�wheel�speeds)�that�the�vehi-
cle�is�on�a�brake�test�stand�and�switches�to�brake�test�stand�mode.�This�process�takes�roughly�six�sec-
onds.
Pull�the�parking�brake�button�several�times�in�a�row�to�approach�the�following�target�positions:
• Brake�pads�in�contact
• Force�level�1�for�brake�test�stand
• Force�level�2�for�brake�test�stand
• Target�force.
Alternatively,�the�parking�brake�button�can�be�continuously�held�in�the�pulled-out�position�while�brake
test�stand�mode�is�active.�The�target�positions�are�then�approached�one-by-one�at�three�second�inter-
vals.
When�brake�test�stand�mode�is�active�and�the�EMF�actuators�are�released,�the�parking�brake�indicator
light�flashes�slowly.
When�brake�test�stand�mode�is�active�and�the�EMF�actuators�are�partially�applied,�the�parking�brake�in-
dicator�light�starts�to�flash�more�quickly.
When�brake�test�stand�mode�is�active�and�the�EMF�actuators�are�fully�applied,�the�parking�brake�indi-
cator�light�remains�permanently�lit.
When�the�vehicle�is�on�a�brake�test�stand,�the�parking�brake�can�be�released�without�having�to�press
the�brake�or�clutch�pedal.�Brake�test�stand�mode�is�automatically�cancelled�when�the�vehicle�is�driv-
en�off�the�brake�test�stand.�It�is�also�deactivated�if�the�parking�brake�button�is�pressed�in�or�if�a�fault�is
present.