Smart Key System

System Diagram:

SYSTEM DESCRIPTION

1. SMART KEY SYSTEM DESCRIPTION

a. In addition to conventional mechanical key and wireless door lock remote control functions, the smart system enables door locking/unlocking, steering lock releasing, engine starting and trunk opening without operating the key. The only requirement is that the key be in the driver's possession.
- This system is controlled by the theft warning ECU. When the theft warning ECU detects the presence of the smart key in one of the detection area, it identifies and checks the ID code, and outputs operation signals to the related ECUs in accordance with their functions.
- The detection areas are formed by 8 oscillators (4 door oscillators, 2 trunk oscillators, and 2 room oscillators).
- The smart function is only available for the master key and is not available for the sub-key and flat key.

Part 1:

Part 2:

2. Function of Main Component

3. System Function

4. Warning Function

a. General
The smart key system is equipped with a warning function to prevent problems resulting from errors in smart key usage. The smart key system works without any requirements from the driver other than having the key in one's possession. The driver, as a result, may become unaware of the presence or location of the key and make errors (listed) that could lead to serious problems.

Examples:
1. The driver is unaware that the key has been taken out of the vehicle by a passenger.
2. The driver exits the vehicle with its engine running.
3. The driver exits the vehicle with its shift lever in a position other than "P".

If the situations occur, the engine may be unable to be started once it has been turned off, the vehicle may be stolen, or other problems may follow. Warning function descriptions for several smart key usage errors are given.

1. Assumption: While the shift lever is in P and the ignition switch is not turned to LOCK, the driver or a passenger takes the smart key out of the vehicle.

Possible result without warning: Vehicle theft or inability to restart engine.

1. Assumption: Doors are locked without turning the ignition switch to LOCK.

Possible result without warning: Vehicle theft or inability to restart engine.

1. Assumption: While the shift lever is not in P position and the ignition switch is not turned to LOCK, the driver is about to exit the vehicle.

Possible result without warning: Vehicle theft or inability to restart engine.

1. Assumption: While the shift lever is not in P position, a passenger takes the smart key out of the vehicle.

Possible result without warning: Inability to restart engine.

1. Assumption*: A passenger takes the smart key out of the vehicle together with luggage.

HINT: This assumption is not default setting.

Possible result without warning: Inability to restart engine.

1. Assumption: An attempt is made to lock the doors while the smart key is inside the vehicle.

Possible result without warning: Vehicle theft.

1. Assumption: An attempt is made to lock a door that is ajar.

Possible result without warning: Vehicle theft or battery depleted.

1. Assumption: The voltage of the smart key has dropped.

Possible result without warning: Smart control is suddenly disabled.

1. Assumption: The smart key is placed outside the smart key detection area (in the glove box or on the floor mat).

Possible result without warning: Driver confusion.