Locking and Alarm Systems (page 5 of 9)

SECURITY

86-5-8

DESCRIPTION AND OPERATION

Battery Replacement on RF Remote Handset

1 Securing screw cover
2 Securing screw
3 Battery cover

4 Battery
5 Remote handset

Every signal from the remote handset contains the transmitter identification code and a rolling code. The BCU checks 
the codes and only responds if the signal is from a valid transmitter. During vehicle production, the remote handsets 
supplied with the vehicle are initialised to set their individual transmitter identification codes and synchronise their 
respective rolling codes with the BCU. If a transmitter loses synchronisation with the BCU, or if a replacement or 
additional remote handset is to be used with the vehicle, the initialisation procedure must be repeated. During the 
procedure, all remote handsets for use with the vehicle must be initialised.

Initialisation Procedure

1 Ensure the vehicle is unlocked and the driver and front passenger doors are closed.
2 Install a key/remote handset in the ignition switch, then turn the ignition switch to position I and back to position 

0 in less than 5 seconds to put the BCU into the initialisation mode. Continue the procedure within 30 seconds 
of turning the ignition switch to position 0.

3 Remove the key/remote handset from the ignition switch.
4 Press and hold the unlock button for a maximum of 15 seconds. During this time, momentarily press the lock 

button three times within 10 seconds.

5 Release both buttons.
6 Successful initialisation is indicated by the BCU locking then unlocking the vehicle. If this does not occur, repeat 

step 4.

7 Repeat steps 4 and 5 with all other remote handsets belonging to the vehicle (4 maximum). Begin the 

initialisation of each remote handset within 30 seconds of completing the previous initialisation, or the BCU will 
drop out of the initialisation mode and the complete procedure will have to be started again.

RF Receiver (Where Fitted)
The RF receiver converts the signals from the RF remote handset into digital messages and transmits them to the 
BCU. The RF receiver is integrated into the rear window antenna amplifier installed behind the inner trim on the top 
left edge of the upper tail door. Operation of the receiver is powered by a permanent battery feed from the rear 
fusebox.

M86 5944

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