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 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 calculated by the certification ECU are compared to check that they match.
* Certification ECU verification occurs when the S code and L code are verified while the engine is being started or the engine switch is being pushed. The ID code box uses the S code to determine whether the certification ECU is authorized. The steering lock ECU uses the L code to determine whether the ID code box is authorized.

2. LOCK OPERATION CONDITIONS FOR STEERING LOCK

(a) When all of the following conditions are met and the certification ECU 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. ENGINE SWITCH INDICATOR FUNCTION

(a) The engine switch indicator blinks in amber indicating a malfunction is present when one of the following occurs: 1) A vehicle speed information malfunction (vehicle speed mismatch) is detected, 2) a malfunction which may result in the steering lock not operating correctly is detected (however, the steering lock operates properly), or 3) a malfunction in the IG control circuit (hold circuit) is detected. If a malfunction which results in the indicator blinking in amber occurs, 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 via LIN communication and communicates with other components via CAN communication through the certification ECU.