Engine Immobilizer System (Diagnostics - Introduction): Overview Lexus RX III рестайлинг

SYSTEM DESCRIPTION [03/2012 - ]

1. ENGINE IMMOBILISER SYSTEM DESCRIPTION The immobiliser system is a theft deterrent system that determines whether to disable starting of the SFI system based on a comparison of the key ID code and the vehicle pre-registered code. The immobiliser system compares the certification ECU (smart key ECU assembly) preregistered ID code with the ID of the key-embedded transponder chip. If the ID codes do not match, the immobiliser system is activated and the SFI system cannot be started.
2. FUNCTION OF MAIN COMPONENTS Component Outline Transponder key coil/amplifier (built into the engine switch) Informs the driver of any power source or system abnormality through the illumination stage of the indicator light. Receives the ID code and transmits it to the certification ECU assembly (smart key ECU assembly) when the key battery is too weak to respond to the tuner based on signals from the room oscillators. Key Receives the signals from the oscillators and returns the ID code to the door control receiver. Steering lock ECU (steering lock actuator assembly) Receives the steering unlock/lock signal from the certification ECU (smart key ECU assembly), and activates the steering lock motor. Certification ECU (smart key ECU assembly) Certifies the ID code received from the door control receiver and transmits the certification results to the steering lock ECU (steering lock actuator assembly). Transmits the steering lock/unlock signals. Transmits the engine immobiliser set/unset request signals. ID code box (immobiliser code ECU) Receives the steering unlock or immobiliser disengage signals from the certification ECU (smart key ECU assembly), certifies them, and transmits each disengage signal to the steering lock ECU (steering lock actuator assembly) or ECM. ECM Receives the signal from the certification ECU (smart key ECU assembly), and performs engine ignition and injection. Main body ECU (multiplex network body ECU)* Receives a remote engine start signal from the remote wireless transmitter and then transmits an accessory immobilizer unset request signal to the certification ECU via the main body ECU (multiplex network body ECU). Remote engine starter ECU assembly* Transmits the accessory immobilizer unset request signal from the remote engine starter ECU assembly to the certification ECU (smart key ECU assembly). Indoor electrical key oscillator Front, Center, Rear Transmits key detection signals within the detection area in the cabin upon receiving a transmission request signal from the certification ECU (smart key ECU assembly). A certification ECU (smart key ECU assembly) request signal is activated when the key is brought into the cabin and the engine switch is pushed. Door control receiver Receives an ID code from the key in the detection area and transmits it to the certification ECU (smart key ECU assembly). Accessory meter assembly Security indicator light Illuminates or flashes. Illumination is controlled by the certification ECU (smart key ECU assembly). *: w/ Remote Engine Starter System