5 Series E60 525d (M57TU) SAL
The control unit for the electrically pivoted trailer coupling receives the input signal "terminal 30g" from the rear
electrical distributor.
The following components are controlled:
-
Drive system for the electrically pivoted trailer coupling
> E60, E61
The drive system pivots the ball head out and in fully automatically as far as each limit position .
[more ...]
-
Trailer coupling release drive
> E90, E91, E92, E93
The drive mechanically releases the trailer coupling ball head. This is done by a DC motor being actuated, which
drives the trailer coupling release unit.
[more ...]
-
Light-emitting diode in the button for the electrically pivoted trailer coupling and for the trailer coupling
release
The indicator lamp shows the system status.
-
Instrument cluster
The instrument cluster is actuated in the event of a Check Control message from the trailer module (AHM).
System functions
The following system functions of the trailer coupling release and electrically pivoted trailer coupling are described:
-
Releasing the trailer coupling (E90, E91, E92, E93)
-
Pivoting the electrically pivoted trailer coupling out and in (E60, E61)
-
Monitoring of terminal 15 and Check Control message
-
Undervoltage and overvoltage
-
Overheating protection for the drive system (E90, E91, E92, E93)
-
Adjusting the trailer coupling (E60, E61)
-
Emergency function (E60, E61)
-
Emergency operation (E90, E91, E92, E93)
Trailer coupling release
> E90, E91, E92, E93
The trailer coupling can be released from terminal 30g ON. The following signal conditions must be satisfied to
allow the coupling to be released:
•
Terminal 30g: high signal
•
Button: low signal
•
Terminal 15: low signal
•
Rear lid contact switch: low signal
•
Microswitch output 1: low signal
•
Microswitch output 2: high signal
The control unit for the trailer coupling release uses the signal conditions to check whether the release
procedure can be started. The DC motor is actuated. During release, the outputs at the microswitch change the
signal conditions. The indicator lamp lights up red.
SBT Electrically operated trailer coupling E60, E61, E90, E91, E92, E93
BMW AG - TIS
12.02.2013 16:00
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 4 -
