Specifications

35
Sensors
Road speed is monitored by a Hall sensor on the left
tailgate drive. The right tailgate drive also has a Hall
sensor which detects when "manual" mode is
required. An additional three small Hall sensors on
the left-hand side monitor the direction of
movement of the tailgate and the current tailgate
position. The Hall sensors are also used for anti-
pinch protection.
This is implemented by a speed/distance detection
system. If an obstruction detected, the drive will
stop. If an obstruction is detected during a closing
cycle, the tailgate is reopened approx. 4 degrees.
When transport mode is activated, the tailgate
control unit is activated, too. In this condition, the
tailgate must be operated manually. The electric
motors are deactivated and only manual operation
is possible. The same applies to standby current
management from power-off stage 2.
Transport mode and standby current management
344_053
The following system faults will cause the electric
tailgate drive to be deactivated:·
–No CAN communication with driver door control
unit J386
–No CAN communication with convenience
system central control unit J393
–No CAN communication with entry and start
authorisation control unit J518
–Components protection in convenience system
central control unit J393 active
–The tailgate power latching system does not
start up when the tailgate is open or the started-
up power latching system provides no feedback
to the convenience system central control unit
J393
Deactivating the electrical tailgate drive
Hall sensor PCB for the detecting the direction of movement of
the tailgate and the tailgate position