Principles of Operation

PRINCIPLES OF OPERATION

Power Locks
The power lock/unlock feature commands both of the vehicle doors to lock or unlock upon a command from the door lock control switch or remote keyless entry (RKE) transmitter. Power locking and unlocking of the doors functions independently of the key position, vehicle speed, or transmission position. The smart junction box (SJB) activates the power door lock relays to supply the correct power and grounds for the door lock actuators.

Autolock

NOTE: Manual transmission vehicles are not equipped with an autolock feature.

On vehicles equipped with an automatic transmission, there are 2 methods to enable/disable the autolock feature, either using the driver door lock control switch or the dealer may enable/disable the feature using a scan tool.

The autolock feature automatically and conditionally locks both doors as a convenience to the customer. This feature operates only when the key is in the ON position.

Autolock occurs when both doors are closed, the brake pedal is applied while the speed is less than 8 km/h (5 mph), and then the speed increases to 8 km/h (5 mph) or greater.

Relock is dependent on an autolock event happening first.

Relock occurs after a door is opened, the brake pedal is applied while the speed is less than 8 km/h (5 mph), all the doors are closed again, and the speed increases to 8 km/h (5 mph) or greater.

Smart Unlock

NOTE: It is possible to lock the vehicle with the key in the ignition lock cylinder if the doors are locked with the RKE transmitter, manually locked with the manual push buttons or locked using the keyless entry keypad (if equipped).

The smart unlock feature prevents the driver door from locking with the key in the ignition lock cylinder. When the SJB receives a LOCK command from a door lock control switch, and the key is in the ignition lock cylinder with the driver door open, the SJB commands the driver door to unlock.

Remote Keyless Entry (RKE) Transmitter
The RKE transmitter can be programmed using the ignition lock cylinder method. Refer to Remote Keyless Entry Transmitter Programming. Transmitter

Remote Keyless Entry (RKE) Transmitter Lock/Unlock Control - Unlock
The RKE transmitter feature provides lock/unlock functions independently of key position, vehicle speed, or transmission position. The RKE transmitter feature provides a 2-step process for unlocking the doors. Upon receipt of the first request for unlocking the doors, the SJB unlocks the driver door only. If another unlock command is received within 3 seconds of the first, the SJB unlocks both the doors.

Remote Keyless Entry (RKE) Transmitter Lock/Unlock Control - Lock
The RKE transmitter feature requests that both the doors be locked when the lock button on the RKE transmitter is pressed. On any press of the LOCK button with both the doors closed, the RKE transmitter feature commands 1 flash of the turn signal lamps. If any door (luggage compartment lid or hood if equipped with perimeter alarm) is ajar, no flash occurs, indicating that both the doors were locked, but one or more closures are ajar. As soon as the last closure is closed, the turn signal lamps flash once. If 2 presses of the LOCK button are received within 3 seconds, the horn chirps once and the turn signal lamps flash to indicate that all the closures are closed and locked. If any door (luggage compartment or hood if equipped with perimeter alarm) is ajar when the second lock command is received within 3 seconds of the first, the RKE transmitter feature commands the horn chirp twice without flashing the turn signal lamps to indicate that both the doors were locked, but 1 or more closures are ajar. When the key is in the ON or START position, no turn signal lamp flashes or horn chirp confirmations occur.

Panic Alarm
The panic alarm feature provides audible and visual alarms that are evident from the exterior of the vehicle. The panic alarm feature commands the turn signal lamps to flash and the horn to sound until deactivation. These outputs occur simultaneously. Activation of the panic alarm is accomplished by pressing the PANIC button on the RKE transmitter whenever the key is in the OFF or ACC positions. At all other times this feature is disabled. Deactivation of an active panic alarm is accomplished by: 1) a second press of the RKE transmitter PANIC button, 2) switching the key out of the OFF or ACC position or, 3) a period of 2 minutes and 45 seconds has elapsed since the initial activation.

Central Locking/Unlocking
The central locking/unlocking function is independent of the ignition switch and transmission range selector lever position. Central unlocking of both the doors is accomplished with the:
- driver door lock control switches (unless the unlock inhibit feature is enabled).
- two unlock commands from the RKE transmitter within 3 seconds.

Central locking of both doors is accomplished with the:
- door lock control switches
- lock command from the RKE transmitter

When the vehicle is in an armed or full-alarm security state, any unlock command from the door lock control switches is ignored if the unlock inhibit feature is enabled. The door lock control switches are enabled if a valid unlock command is received from the RKE transmitter or the key is cycled to ON.

Unlock Inhibit Programming

NOTE: Both of the doors must be closed during the unlock inhibit programming procedure.

1. Turn the key to ON.
2. Press the UNLOCK button 3 times.
3. Turn the key to OFF.
4. Press the UNLOCK button 3 times.
5. Turn the key to ON.
6. Press the LOCK button, then press the LOCK button again. The horn chirps once if the unlock inhibit feature was just deactivated or it chirps twice (1 short chirp and 1 long chirp) if the unlock inhibit feature was just activated.
7. Turn the key to OFF. The horn chirps to confirm the procedure is complete.