Principles of Operation
PRINCIPLES OF OPERATIONPower Lock
The power lock/unlock feature requests all of the vehicle doors, including the liftgate, be locked or unlocked upon a customer request from any interior door lock switch in the vehicle. The power door locking system functions independently of ignition status or vehicle speed. When the vehicle security module receives an unlock/lock command from any door lock control switch, the vehicle security module activates relays internal to the module to supply the correct power and grounds for the door lock actuators.
Auto-Locking
The auto-locking feature locks all doors when all doors, including the liftgate, are closed, the brake pedal was pressed with the key in the ON position, and a vehicle speed of 8 km/h (5 mph) or higher is achieved. This feature relocks the doors (if any doors are open) after the brake pedal is pressed, once all doors are read as closed, and the vehicle speed exceeds 8 km/h (5 mph). The door ajar switches are wired directly to the vehicle security module. The auto-locking feature can be enabled/disabled through module configuration, the diagnostic tool, the RKE keypad, the instrument panel message center (if equipped), or the ignition switch.
Auto-Lock Enable/Disable - Using the RKE keypad
A manual enable/disable mode allows the auto-lock feature to be turned off and on.
To enable or disable the auto-lock using the RKE keypad:
1. Enter the 5-digit permanent entry code into the RKE keypad.
2. Within 5 seconds of entering the code, press and hold the 7/8 button on the RKE keypad.
3. Within 5 seconds of Step 2, and while holding the 7/8 button, press the 3/4 button on the RKE keypad and release it.
4. Within 5 seconds of Step 3, release the 7/8 button on the RKE keypad.
If the auto-lock feature is disabled, the horn chirps once. If the auto-lock feature is enabled, the horn chirps once shortly and then sound a 2nd time for a longer sound of the horn once the above sequence is completed.
Auto-Lock Enable/Disable - Using the Ignition Switch
Another way to turn the auto-lock feature off/on is by following this series of steps:
1. Close all doors.
2. Confirm that the key is in the OFF position.
3. Turn the key from OFF to ON.
4. NOTE: Steps 4 through 8 must be carried out within 30 seconds.
Press UNLOCK 3 times.
5. Turn the key from ON to OFF.
6. Press UNLOCK 3 times.
7. Turn the key from OFF to ON.
8. Verify that the horn chirps. This indicates the enable/disable mode is now ready to accept program changes.
9. Press UNLOCK once to command the vehicle security module to toggle the auto-lock/relock feature OFF.
10. Press LOCK once to enter the command.
11. Verify that the horn chirps 1 time. There should only be 1 chirp indicating that the auto-lock/relock feature has been disabled. If 1 chirp is heard followed by a longer sound of the horn, the auto-lock/relock feature has just been enabled. Return to Step 10.
12. Turn the key to the OFF position to exit the enable/disable mode.
13. Exit the vehicle and verify that the horn chirps once to indicate that the feature has been changed and that auto-lock/relock has been disabled.
Smart Unlock
The smart unlock feature prevents the driver door from locking with the key in the ignition lock cylinder. When the vehicle security module receives a LOCK command from a door lock switch with the key in the ignition lock cylinder and the driver door open, the vehicle security module commands the driver door to UNLOCK.
Remote Keyless Entry (RKE) Transmitter Lock/Unlock Control - Unlock
The remote control feature provides lock/unlock functions independently of ignition status, vehicle speed, or transmission position. The remote control feature provides a 2-step process for unlocking the doors. Upon receipt of the first request for unlocking the doors, the remote control feature requests the vehicle security module to unlock the driver door only. If another unlock request is received within 3 seconds of the first, the remote control feature requests that all doors be unlocked.
Remote Keyless Entry (RKE) Transmitter Lock/Unlock Control - Lock
The remote control feature requests that all the doors be locked when the LOCK button is pressed. On any press of the lock button with all doors closed, the remote control feature requests 1 flash of the parking lamps. If any door is ajar, no flash occurs, indicating it locked all the doors but 1 or more doors are ajar. As soon as the last door is closed, 1 flash of the parking lamps occurs. If 2 presses of the lock button are received within 3 seconds, the horn chirps once, the parking lamps flash twice to indicate that all the doors are closed and locked. If any door is ajar when the second lock request is received within 3 seconds of the first, the remote control feature requests the horn chirp twice without flashing the parking lamps to indicate it locked all the doors but 1 or more doors are ajar. When the key is in the RUN or START position, no parking lamp flashes or horn chirp confirmations occur.
Panic Alarm
The panic alarm feature controls activation of the panic alarm, providing audible and visual alarms that are evident from the exterior of the vehicle. The panic alarm feature requests that the parking lamps and horn are flashed until deactivation. The flashing of the outputs occurs synchronously. Activation of the panic alarm is accomplished by pressing the PANIC button on a RKE transmitter whenever the key is in the OFF or ACC position. At all other times this feature is disabled. Deactivation of an active PANIC alarm is accomplished by: a second press of the RKE transmitter PANIC button, the ignition is switched out of the OFF or ACC position, or a period of 2 minutes and 45 seconds has elapsed since the initial activation.
Remote Keyless Entry (RKE) Keypad
The RKE keypad, located on the exterior of the driver door, provides a method for the customer to access the vehicle without a key or RKE transmitter. The RKE keypad feature:
- locks all doors.
- unlocks only the driver door.
- unlocks all doors.
- programs/erases the customer key code.
- enables/disables auto-locking.
- liftgate glass
The RKE keypad feature operates independently of ignition status, vehicle speed, or transmission position. When a RKE keypad button is pressed, the keypad buttons illuminate to provide better visibility. If 7/8 and 9/0 are pressed or 5 seconds have elapsed since the last button press, the illumination is turned off.
Each vehicle equipped with a RKE keypad is programmed with a 5-digit entry code. This code is provided to the customer on a wallet card in the Owner Literature package. In addition, this code is available through a diagnostic tool and is printed on the vehicle security module label. When entering codes, each digit must be entered within 5 seconds of the previous button press.
Anti-Scan Feature
To provide added security, the RKE keypad is disabled for 1 minute after 35 button presses without a valid entry code being entered. The keypad flashes during this 1-minute mode with all functionality disabled except for 7/8 and 9/0 still being allowed to lock the vehicle.
Anti-Scan is turned off after any of the following events:
- 1 minute of RKE keypad inactivity has elapsed.
- The RKE transmitter UNLOCK button is pressed.
- The key is turned to the ON position.
Unlocking the Doors with the RKE Keypad System
To unlock the driver door, enter either the factory set code or the personal code (each digit must be pressed within 5 seconds of the prior digit). The interior lamps will illuminate.
To unlock all doors, enter either the factory set code or the personal code (driver door unlocks) and press the 3/4 button within 5 seconds.
To unlock the liftgate glass, enter either the factory set code or the personal code (each digit must be pressed within 5 seconds of the prior digit) and press the 5/6 button within 5 seconds.
Locking the Doors with the RKE Keypad System
It is not necessary to enter the factory set or personal code prior to locking all doors. To lock all doors, press the 7/8 and 9/0 buttons at the same time.