2-FLASH CODE - Example with programmed control unit, no transponder and/or malfunctioning aerial.
Ignition disabled-Vehicle immobilised
Diagnostic code - 3 flashes
If the 3-flash code is detected, check if the failure occurs when the MASTER key in inserted into the
key switch.
- If the failure disappears when the MASTER key is used, proceed with coding a new service key (Blue).
- If the failure persists, it means that the MASTER key and the control unit are not linked; in this case,
replace the control unit and then encode the keys.
The immobilizer system is efficient when, after switching over to «ON», only a 0.7-sec flash is detected
(see diagram).
In this case, the engine can be started.
Example with programmed control unit, trans-
ponder, programmed key and working aerial. The
ignition is enabled (regular use conditions)
3-FLASH CODE - Example with programmed control unit, aerial working properly and unknown trans-
ponder code. Ignition disabled-Vehicle immobilised
Ignition circuit
Once the immobilizer system is enabled, the HV coil and the signals from the Pick-Up will produce a
spark in the spark plug.
The battery provides the basic power supply. The system is adjusted so that the start-up system im-
mediately detects an eventual battery voltage drop, but this is practically irrelevant for the ignition
system.
Electrical system B 125-250
ELE SYS - 88
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