ENGINE STARTING FUNCTION

CONSTRUCTION DIAGRAM

OPERATION

WHEN THE USER IS CARRYING THE KEYLESS OPERATION KEY

1. Press the IG knob on the steering lock, and the push switch inside the steering lock is turned ON.
   
2. When the push switch inside the steering lock is turned ON, KOS-ECU activates the interior transmitter antenna assembly to send the transmitter signal to the keyless operation key.
   
3. On receiving the transmitter signal from KOS-ECU, the keyless operation key performs the keyless operation key certification and the key ID calculation, and sends the keyless operation key ID data to KOS-ECU. (The keyless operation key cannot receive the transmitter signal from KOS-ECU when it is not located within the engine starting function valid area .)
   
4. The receiver antenna receives the signal from the keyless operation key, and then KOS-ECU compares the keyless operation key ID data sent from the key with the one registered in it.
   
5. When this data coincides, KOS-ECU sends the IG knob unlock signal to the steering lock unit inside the steering lock.
   
6. On receiving the IG knob unlock signal, the steering lock unit performs processing (verification of the KOS ID, etc.) based on the received data. When no problem is found during the processing, the unit sends the OK status signal to KOS-ECU, and at the same time, electrically disengages the steering lock mechanism to make the IG knob rotatable.
   
7. When a keyless operation key certification agreement memory "exists" ^*1 in KOS-ECU when it received the OK status signal from the steering lock unit, the engine start permission communication (CAN communication) is performed between KOS-ECU and the engine-ECU by turning the IG knob from the "ACC" position to the "ON"/"START" position, and the engine starts. If the keyless operation key certification agreement memory "does not exist" ^*2, the engine does not start.
   

   note

   *1: The keyless operation key certification agreement memory "exists" means that a registered keyless operation key has been recognized during the keyless operation key certification communication. *2: When the keyless operation key certification agreement memory "does not exist," the "keyless operation key bringing-out monitoring function" and the "keyless operation key replacement monitoring function" (keyless operation key monitoring controls) have judged that the keyless operation key has been carried out of the vehicle with the IG knob in the LOCK "(OFF)" position while turning ON the push switch or in the ACC, ON, or START position.

KEYLESS OPERATION KEY TAKE OUT MONITORING FUNCTION

KEYLESS OPERATION KEY REPLACEMENT MONITORING FUNCTION

ENGINE STARTING FUNCTION VALID AREA

EMERGENCY FUNCTION

CONSTRUCTION DIAGRAM

OPERATION

1. Remove the IG knob cap, and insert the emergency key into the keyless operation key in the inverted direction to insert it into the KOS steering lock. The transponder (a small transmitter) integrated in the keyless operation key receives the weak radio frequency signal and operates the emergency key with the keyless operation key inserted in the inverted direction. Using the keyless operation key, insert and rotate the emergency key.
   
2. With the emergency key turned ON, the transponder integrated in the keyless operation key transmits its specific ID code (key ID) to the receiver antenna module via radio wave.
   
3. KOS-ECU compares the key ID with the ID code registered in it, and only when they coincide, KOS-ECU permits the engine start. (More than one trillion of ID code combinations can be registered. This feature prevents code copying, resulting in higher security of the system.)
   
4. After the engine is started by the emergency key, remove the keyless operation key.