The system consists of the following parts:
- immobilizer control unit;
- immobilizer control lamp in hours (there is the same control lamp for the anti-theft system);
- engine control unit (gasoline engines);
- electromagnetic valve for engine shutdown in high-pressure fuel pump (diesel);
- coils in ignition key;
- castle (switch) ignition with built-in converter.
The converter is a battery-free receiving and transmitting device that has its own separate code for each ignition key.
The immobilizer is activated when the ignition key is removed.
When the ignition is switched on, electrical energy is inductively transmitted through the coil to the converter in the key. The key code is read and transmitted to the immobilizer control unit. There, the key code is compared with the code stored in memory. After this, the engine control unit code is checked.
If the engine turns over but does not start, you should first check the red control LED. If the LED flashes rapidly for about 1 minute, this means that the system has been triggered and the receiver in the ignition switch has not recognized the key code.
The reasons for this may be the following:
- another key from the keychain is interfering with the reading process;
- incorrect key code.
Electronic testing of the immobilizer is carried out using a diagnostic device by polling the diagnostic unit.
1. Ignition key with electronic code; 2. Receiving and transmitting device; 3. Ignition switch; 4. Control lamp (LED); 5. PAST module (diesel engine only); 6. EEC-V module; 7. Starter; 8. Fuel shut-off valve.