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Gearbox management system
Gear selector movement sensors
1 to 4, G487 to G490
The gear selector movement sensors are located
in the mechatronic unit.
On combination with the solenoids on the selector
forks, they generate a signal, from which the control
unit recognises the precise position of the gear
selectors.
G490
gears 6 and R
G489
gears 5 and 7
S390_051
G488
gears 1 and 3
G487
gears 2 and 4
Signal use
Effects of signal failure
The control unit requires the precise position of the
gear selectors to control the gear selectors for
changing gears.
If a movement sensor fails, the control unit cannot
detect the position of the corresponding gear selector.
As a result, the control unit is unable to recognise
whether or not a gear is changed via the gear
selector and the selector fork.
To prevent damage to the gearbox, the gearbox path
of the movement sensor which has failed is shut off in
this case.
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