Range Rover P38
ELECTRICAL
13
DESCRIPTION AND OPERATION
If the remote handset code moves outside the BeCM
capture range, resynchronisation can be achieved by
locking or unlocking the driver’s door using the vehicle
key within 30 seconds of locking, superlocking or
unlocking using the remote handset. The BeCM
monitors the condition of the driver’s door CDL switch
to initiate the resynchronisation.
If the vehicle has EKA and the alarm system is not
active the above procedure can be used to
resynchronise the remote handset. The EKA code
procedure must be used to resynchronise the remote
handset if the alarm system is active.
On vehicles from 97MY onwards, the passive
immobilisation feature will reprogramme the code
using the passive coil and the remote handset when
the key is inserted into the ignition switch.
Decoding of the remote handset signal is performed
by the BeCM not the RF receiver. The BeCM uses a
code taken from a 14 digit lockset bar code,
programmed into the BeCM at the factory. The BeCM
compares this code with that transmitted by the
remote handset to ensure that the correct code for the
vehicle is being transmitted. Once programmed the
code cannot be changed. If a new lockset is required,
then the BeCM must be replaced to match the lockset
bar code.
RF Receiver
The RF receiver is located under the RH rear parcel
shelf. The receiver is not unique to each vehicle,
although several different receivers are used to cover
differing operating frequencies and market legislation.
The RF receiver frequency to be used can be found
on a label on the remote handset.
Power Windows and Sunroof
The front windows are controlled by the BeCM via
outstations in each front door and the centre console
switch outstation. When a centre console switch is
operated for front window operation, the centre
console outstation inputs information to the BeCM,
which then outputs the appropriate command signals,
via the serial data bus, to operate the front windows
as required. The rear windows and sunroof are
controlled directly by the BeCM which responds to
operation of the applicable rear window or sunroof
switches.
The front windows and sunroof have ’one touch’ and
’inch’ modes of operation. The sunroof and the front
and rear window systems have an ’anti-trap’ function
to prevent injury to driver or passengers.
Windows Initialisation
Initialisation of the windows enables the one shot
function on the front windows and the anti-trap
function on all windows after battery disconnection.
Initialisation is achieved by holding the applicable
window switch in the down position until the window
stalls. Then hold the switch in the up position and
when the window is fully closed hold the switch in the
up position for a further 1 second. An audible chime
will sound and the message centre will display a
message to confirm that the applicable window has
been set.
Sunroof Initialisation
Initialisation of the sunroof enables the one shot and
anti-trap functions after battery disconnection.
Initialisation is achieved by holding the sunroof slide
slide switch in the open position until the sunroof
stalls. Then hold the sunroof slide switch in the closed
position until the sunroof stalls at fully closed. Repeat
the operation for the tilt open and close functions.
When the sunroof is successfully initialised, the
message centre will display a ’SUNROOF SET’
message.
Front Windows and Sunroof ’One-Touch’ Function
Operation of the front window switches or the sunroof
slide switch for less than 0.4 seconds in either
direction, will start the selected aperture to move in
the one-touch mode of operation. The aperture will
move in the selected direction until the motor stalls or,
if the aperture is closing, a trap is detected. The
aperture can be stopped at any point by operating the
applicable switch in the opposite direction. The
one-touch function is market programmable. Note that
the sunroof tilt function only operates in the inch mode
of operation.