UAZ PATRIOT, Operation Manual

Page: 46 / 184

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Motor vehicle's electronic anti-theft system with the engine
control unit Me 17.9.71 (engine ZMZ-40906)
The anti-theft system set includes three ignition keys, in whose
bows the transponders are embedded. The keys are equal in terms
of their functional capabilities. The system allows eight ignition
keys to be registered. The prerequisite for system operation is
the registration of three ignition keys.
The system can be in the "neutral", "taught" and "key upgrading"
states with respect to ignition key registration.
"Neutral" state — after replacing the engine control unit at a
service station, the system carries out automatic registration of
the ignition keys, for this purpose the ignition should be started
up by each key one by one.
Motor vehicle engine start is not possible until three keys are
registered automatically and the system state changes to "taught".
"Taught" state — three keys are registered successfully.
"Key upgrading" state — after the procedure of switching
over to this state, the system registers (re-registers) the required
number of the ignition keys.
When starting up the ignition without successful key registration
and successful key code recognition the engine start is not possible.
With regard to prevention of unauthorized motor vehicle use
the system can be in the "ON" and "OFF" states.
"ON" state — the immobilizer locks engine start. The
immobilizer turning-on signal device
is continuously switched
ON.
The system switches over to this state in the following cases:
- if the engine is not started for 25 s after starting up the
ignition and successful key code recognition;
- if after starting up the ignition the key code is not recognized
(the system will store the trouble code, which can be read out
using a diagnostic tester);
- if the system is in the "neutral" state and key registration
is not carried out;
- if the system is in the "taught" state and an unregistered
key is used;
- if the system is in the "key upgrading" state and key
registration (re-registration) is not carried out;
- in 25 s after starting up the ignition;