ENGINE IMMOBILISER SYSTEM SYSTEM DESCRIPTION


  1. ENGINE IMMOBILISER SYSTEM DESCRIPTION

    The engine immobiliser system is designed to prevent the vehicle from being stolen. This system uses a transponder key ECU assembly that stores the key codes of authorized ignition keys. If an attempt is made to start the engine using an unauthorized key, the ECU sends a signal to the ECM to prohibit fuel delivery and ignition, effectively disabling the engine.

  2. FUNCTION OF MAIN COMPONENT

    Component Outline
    Transponder key amplifier When the key is inserted into the ignition key cylinder, the antenna coil receives the key code. Then the amplifier amplifies the ID code and outputs it to the transponder key ECU assembly.
    Unlock warning switch assembly Detects whether the key is in the ignition key cylinder and outputs the results to the transponder key ECU assembly.
    Transponder key ECU assembly Checks the ID code received from the transponder key amplifier and if the results match, an EFI operation permission signal is sent through the ECD communication.
    ECM Through ECD communication, the ECM receives the ID verification results from the transponder key ECU assembly. The ECM also verifies the ECUs. Then the judgment of whether or not to disable the engine is made.

  3. SYSTEM FUNCTION


    1. When the transponder key ECU assembly detects that the unlock warning switch assembly is on, the transponder key ECU assembly provides current to the antenna coil and produces a weak electric wave. A transponder chip in the key grip receives the electric wave. Upon receiving the electric wave, the transponder chip outputs a key ID code signal. The transponder key coil receives this signal, the signal is amplified by the transponder key amplifier and the signal is transmitted to the transponder key ECU assembly.