L322 Range Rover System Description and Operation
DOORS
76-1-10 DESCRIPTION AND OPERATION
Operation
General
The operating logic for controlling the tailgate locking system is a function of the BCU.
NOTES:
l
It is possible to open the tail door with the remote control irrespective of the vehicle central locking status
l
At vehicle speeds > 5 mph (8 km/h) it is not possible to operate the tail door . This facility prevents inadvertent
operation while driving.
Upper Tail Door
The tail door is released by a special central locking unit with return spring shuttle.
To unlock/release the tail door, the CDL unit is powered directly for 0.7 seconds via a load switching relay in the BCU.
The table below shows the functions of the upper tail door for which the central locking unit is activated.
Power is applied to the actuator in the CDL unit and the tail door opens.
The return spring in the CDL unit re-establishes the initial position of the CDL unit.
Lower Tail Door
The lower tail door is opened by a special CDL unit with return spring (shuttle).
The CDL unit is activated by the BCU via a load switching relay and power is applied for 0.7 seconds.
The actuator releases the tail door lock so that the lower tail door can be opened. After power has been applied, the
return spring resets the CDL unit to its initial position.
The table below shows the functions of the lower tail door for which the CDL unit is activated.
Repeat Lockout
A repeat lockout facility similar to the repeat lockout function of the CDL is used in order to protect the motors from
thermal overload in the event of the tail door being locked/unlocked too often in succession.
Inside upper tailgate
push-button
Outside upper
tailgate push-
button
Remote control for
upper tailgate
Terminal R + v>0
−
−
−
Unlock +
+
Lock +
+
Central secure
−
+
Selective unlock
+
+
"+" = CDL unit is activated; "-" = CDL unit is not activated
Inside lower tailgate push-button
When upper tail door open
When upper tail door closed
Terminal R + v>0
−
−
Unlock +
−
Lock +
−
Central secure
+
−
Selective unlock
+
−
"+" = CDL unit is activated; "-" = CDL unit is not activated
