Renault 1992 ANTI THEFT SYSTEM R21, Руководство по применению, Страница: 6 / 12

3.2
GENERAL OPERATION
Decoder Unit (BII)
This system is similar to many other immobilizer systems as it uses a transponder within
the head of the key to send its code to the immobilizer when interrogated via the immobi-
lizer ignition key barrel antenna. The code from the key is transferred to the Decoder Unit
which has the following functions:
•
Decoding the key transponder signal, via the antenna coil
•
Management of the engine immobilizer system by sending the received code to ei-
ther the EMS-ECM (Petrol engine) or the Coded Solenoid Valve (Fuel Cut-off valve
for diesel engines) to authorize the vehicle to be started
•
Control of the immobilizer LED
•
Central door locking functions (if fitted)
•
Courtesy light control (part of central locking if fitted)
Multi Timer Unit (BMT)
The Multi Timer Unit has the same immobilizer function as the Decoder Unit above using
an ignition key with a transponder and an ignition key barrel antenna. The Multi Timer
Unit has the following functions (amongst others):
•
Decoding the key transponder signal, via the antenna coil
•
Management of the engine immobilizer system by sending the received code to ei-
ther the EMS-ECM (Petrol engine) or the Coded Solenoid Valve (Fuel Cut-off valve
for diesel engines) to authorize the vehicle to be started
•
Control of the immobilizer LED
•
Central door locking functions (if fitted)
•
Courtesy light control (part of central locking if fitted)
Type 'I' Key Recognition Optional IR Rolling Code - Petrol/Diesel
This system can be used with or without an Infrared Remote Control, which would require
a separate control unit.
Type 'J' Coded Card instead of Key
This system is an immobilizer only, a separate system must be used to operate the cen-
tral locking, however, a Coded Card may contain a remote control transmitter for gaining
entry to the vehicle.