ENGINE IMMOBILISER SYSTEM(w/ Entry and Start System) SYSTEM DESCRIPTION

ENGINE IMMOBILISER SYSTEM DESCRIPTION

1. The engine immobiliser system determines whether or not to enable starting of the SFI system based on a comparison of the key ID code and the vehicle pre-registered code. The engine immobiliser system compares the vehicle certification ECU (smart key ECU assembly) pre-registered ID code with the electrical key transmitter-embedded transponder chip ID code. If the ID codes do not match, the engine immobiliser system activates and the SFI*1 or ECD*2 system cannot be started. The certification ECU (smart key ECU assembly) manages communication with the SFI system, steering actuator assembly (steering lock ECU) and ID code box (immobiliser code ECU). When the ID codes of the transponder chip and certification ECU (smart key ECU assembly) match, the certification ECU (smart key ECU assembly) authorizes the starting of the SFI*1 or ECD*2 system.

   
   

   • *1: except 1ND-TV

   • *2: for 1ND-TV

SYSTEM FUNCTION

1. Using the entry function

   
   

   1. When the driver (or an occupant) gets in the vehicle and depresses the brake pedal*1 or clutch pedal*2 while carrying the electrical key transmitter, the certification ECU (smart key ECU assembly) recognizes that the brake pedal*1 or clutch pedal*2 is depressed and sends an electrical key transmitter certification request signal to the indoor electrical key oscillator. When the request signal is received, the indoor electrical key oscillator sends another request signal in order to detect whether the electrical key transmitter is inside the vehicle. When the electrical key transmitter receives this request signal, it sends back an ID code which includes a response code. The ID code sent from the electrical key transmitter is sent to the certification ECU (smart key ECU assembly) via the door control receiver. When the ID code is received, the certification ECU (smart key ECU assembly) analyzes the code. If the certification result is normal, the indicator in the combination meter assembly illuminates in green.When the indicator illuminates in green and the driver presses the engine switch, the certification ECU (smart key ECU assembly) recognizes the engine start signal, turns the ACC relay on and turns the IG1 and IG2 relays on in that order after 0.025 seconds. At this time, the certification ECU (smart key ECU assembly) confirms that the power source mode has changed and supplies the steering lock actuator with power. Then (via the ID code box [immobiliser code ECU]) the steering actuator assembly (steering lock ECU) confirms that the certification ECU (smart key ECU assembly) is the proper ECU and drives the steering actuator motor until the steering lock is unlocked. After the steering lock is unlocked, the steering actuator assembly (steering lock ECU) sends an unlock completion signal to the certification ECU (smart key ECU assembly). When this signal is received, the certification ECU (smart key ECU assembly) sends an immobiliser unset command signal to the ID code box (immobiliser code ECU). Once this signal is received, the ID code box (immobiliser code ECU) sends an immobiliser unset command signal to the SFI system after confirming that the certification ECU (smart key ECU assembly) is the proper ECU. Then the certification ECU (smart key ECU assembly) sends a security indicator light "off "signal to the theft warning indicator light assembly.

      
      

      • *1: for CVT

      • *2: for Manual Transaxle

2. Not using the entry function (when the battery is depleted, the transmitter is affected by wave noise, etc.)

   
   

   1. When the driver is sitting in the vehicle while carrying the electrical key transmitter and the brake pedal*1 or clutch pedal*2 is depressed, the certification ECU (smart key ECU assembly) recognizes that the stop light switch*1 or clutch start switch*2 is on and activates the transponder key amplifier built into the engine switch. At this time, the engine switch outputs a wave communication signal. If the driver holds the electrical key transmitter up to the engine switch at this time, the electrical key transmitter receives the immobiliser wave signal and responds by sending a wave signal. When the engine switch receives the wave signal from the electrical key transmitter, it duplicates the signal and sends an ID code to the certification ECU (smart key ECU assembly). Upon receipt of the ID code, the code is analyzed. If the certification passes, a sound buzzer request signal is sent to the combination meter assembly. At this time, the ACC relay is switched on and the IG1 and IG2 relays are switched on in sequence after 0.025 seconds, and the indicator in the combination meter assembly illuminates in green. Then the certification ECU (smart key ECU assembly) checks that the power source mode has been changed and supplies power to the steering lock actuator. Then (via the ID code box [immobiliser code ECU]) the steering actuator assembly (steering lock ECU) confirms that the certification ECU (smart key ECU assembly) is certified and drives the steering actuator motor until the steering lock is unlocked. After unlocking the steering lock, an unlock completed signal is sent to the certification ECU (smart key ECU assembly). Upon receipt of this signal, the certification ECU (smart key ECU assembly) sends an unset command signal to the ID code box (immobiliser code ECU). Once this signal is received, the ID code box (immobiliser code ECU) confirms that the certification ECU (smart key ECU assembly) is certified, sends an immobiliser unset command signal to the SFI*3 or ECD*4 system, and then the certification ECU (smart key ECU assembly) sends a security indicator light "off" signal to the clock assembly (security indicator light).

      
      

      • *1: for CVT

      • *2: for Manual Transaxle

      • *3: except 1ND-TV

      • *4: for 1ND-TV

START FUNCTION PROBLEM SYMPTOMS

• *1: Refer to Problem Symptoms Table for Entry and Start System (for Start Function) Click here.

• *2: Refer to Problem Symptoms Table for Steering Lock System Click here.

• *3: except 1NZ-FE