L322 Range Rover System Description and Operation
SECURITY
86-5-6
DESCRIPTION AND OPERATION
CDL Switch
The CDL switch is a non latching push switch installed between the centre face vents on the fascia, below the hazard
warning switch. The CDL switch allows occupants to centrally lock the vehicle without arming the alarm. When the
CDL switch is pressed, a battery voltage signal is connected to the BCU.
Upper Tail Door Internal Release Switch
The internal upper tail door release switch is a non latching push switch installed on the centre console. The switch
allows the tail door to be opened from inside the vehicle. When the switch is pressed a ground is connected to the
BCU. The BCU only responds to the input when the CDL system is unlocked and the vehicle is stationary.
Upper Tail Door External Release Switch
The external upper tail door release switch is a microswitch installed in the license plate lamp housing in the bottom
edge of the upper tail door. The switch is operated by a lever connected to a rubber covered plate set into the outside
surface of the license plate lamp housing. When the switch is activated it connects a ground to the BCU. The BCU
only responds to the input when the CDL system is unlocked and the vehicle is stationary.
Lower Tail Door Release Switch
The lower tail door release switch is a non latching push switch installed under a rubber cover in the top edge of the
lower tail door. When the switch is pressed, a battery voltage signal is connected to the BCU. The BCU only responds
to the input when the upper tail door is unlatched and the vehicle is stationary.
Lower Tail Door Release Relay
The lower tail door release relay is installed on the rear fusebox. When the BCU receives a valid input from the lower
tail door release switch, it momentarily energises the relay to simultaneously activate the lower tail door release
actuators.
Remote Handsets
The remote handset is incorporated into the head of the ignition key. Up to four different remote handsets can be
initialised for use on the same vehicle.
The type of transmitter is market dependent and is either a Radio Frequency (RF) transmitter, operating at 315 or 433
MHz, or an infrared transmitter. RF transmitters communicate with the vehicle through the radio antenna integrated
into the rear window heater and have an operating range of 10 m (32.8 ft) minimum and up 30 m (98.4 ft) under
optimum conditions. Infrared transmitters communicate with the vehicle through an infrared receiver integrated into
the interior rear view mirror and have an operating range of 3 m (9.8 ft) minimum and up to 5 m (16.4 ft) under optimum
conditions.
Each remote handset incorporates a signal processor, transmitter and power supply in a dustproof and waterproof
housing. Buttons on the housing operate the remote functions. An LED on the housing flashes when a button is
pressed to confirm operation to the user. If the LED does not flash when a button is pressed the battery needs
recharging/replacing.
RF remote handsets have three operating buttons:
l
The lock button, for locking and superlocking of the vehicle and convenience closing of the windows and sunroof
l
The unlock button, for unlocking the vehicle and convenience opening of the windows and sunroof
l
The tail door open button, for opening the tail door while the rest of the vehicle remains locked and for panic alarm
activation.
Infrared remote handsets only have two operating buttons, a lock button and an unlock button.