System Description

STEERING COLUMN: STEERING LOCK SYSTEM: SYSTEM DESCRIPTION

1. UNLOCK OPERATION CONDITIONS FOR STEERING LOCK

(a) When the following condition is met, the unlock operation is performed.

(1) The engine switch is on (ACC) or on (IG).

HINT
When the engine switch is turned on (ACC) or on (IG) and the key and certification ECU (smart key ECU assembly) are verified, the steering is unlocked.

(b) When any of the following conditions are met, key verification is performed.

* The engine switch is pressed.

* The brake pedal is depressed so that the engine can be started.

* 30 seconds elapse after opening and closing a door.

HINT
* Key verification occurs when the code emitted from the key and the code stored by the certification ECU (smart key ECU assembly) are compared to check that they match.
* Certification ECU (smart key ECU assembly) verification occurs when the L code are verified while the engine is being started or the engine switch is being pushed. The steering lock ECU uses the L code to determine whether the certification ECU (smart key ECU assembly) is authorized.

2. LOCK OPERATION CONDITIONS FOR STEERING LOCK

(a) When all of the following conditions are met and the certification ECU (smart key ECU assembly) has been verified, the lock operation is performed.

(1) The engine switch is off.

(2) The shift lever is in P.

(3) A door is opened or a door lock operation (smart door lock, wireless door lock or key-linked lock operation*) is performed.

HINT
*: This is the lock/unlock operation with the mechanical key.

3. WARNING FUNCTION

(a) Smart warning light flashes orange (for vehicles without multi-information display) or a check smart key system message is displayed on the multi-information display (for vehicles with multi-information display) in the combination meter assembly when one of the following occurs: 1) A vehicle speed signal malfunction is detected, 2) a malfunction that interferes with steering lock ECU operation is detected, or 3) an IG circuit malfunction is detected.

If a malfunction which results in the indicator blinking in amber occurs or message being displayed, the engine cannot be started once it is turned off.

HINT
DTCs are stored in all cases listed above.

4. STEERING LOCK ECU DESCRIPTION

(a) The steering lock ECU is built into the steering lock actuator assembly of the steering column assembly.

(b) The steering lock ECU is not connected to the CAN communication system. However, the steering lock ECU is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).