Principles of Operation (How Does it Work?)

PRINCIPLES OF OPERATION

Power Locks
The power lock/unlock feature requests all of the vehicle doors, including the liftgate, to locked or unlock upon a request from the door lock control switch, the keyless entry key pad or remote transmitter. Power locking and unlocking of the doors functions independently of the key position, vehicle speed or transmission position. The vehicle security module activates internal relays to supply the correct power and grounds for the door lock actuators.

The liftgate window glass is released, using the keypad or the remote transmitter, and will not operate if the vehicle speed is greater than 7 km/h (5 mph), the doors are locked, the battery has been disconnected and then reconnected, or if the module has been disconnected and then reconnected causing the liftgate glass release switch to enter the disable mode. The liftgate release switch is reset by unlocking all the doors.

Power Unlock Inhibit
With the key in the OFF position, 20 seconds after electrically locked (remote transmitter, keyless entry keypad, door lock control switch locked with door ajar) and all doors closed, the door lock control switch UNLOCK button is disabled if this feature is enabled. (The lock function will still operate.)

Deactivating/Activating Power Door Unlock Switch Inhibit
This feature is customer-configurable. Steps one through three must be completed within 30 seconds.
1. Turn the key to ON, then press UNLOCK three times.
2. Turn the key to OFF, then press UNLOCK three times.
3. Turn the key to ON.
4. Verify that the horn chirps. This indicates the enable/disable mode is ready to receive program changes.
5. Within five seconds press the LOCK button twice.

Two horn chirps indicate the system is disabled. Two horn chirps, followed by the horn sounding, indicate the system is enabled.

Pressing the lock button twice again toggles the door lock control switch UNLOCK button inhibit feature state.

Turn the key OFF to exit the enable/disable programming mode.

Autolock
The autolock feature locks all the doors when all the doors, including the liftgate, are closed, the brake pedal is pressed with the key in ON position and vehicle speed then exceeds 8 kph (5 mph) or higher. This feature relocks the doors (if any doors were open) after the brake pedal is pressed, once all the doors are read as closed and vehicle speed then exceeds 8 kph (5 mph). Door ajar switches are wired directly to the vehicle security module. The autolock feature can be enabled/disabled through module configuration, the ignition switch, and the keyless entry keypad. The auto-lock feature also uses inputs from the key position, the brake pedal position (BPP) switch and vehicle speed via the universal asynchronous receiver-transmitter (UART) based protocol (UBP) network.

Autolock Enable/Disable - Using the Keypad
A manual enable/disable mode allows the autolock feature to be turned off and on.

To enable or disable autolock using the keyless entry keypad:
1. Enter the five-digit permanent entry code into the keyless entry keypad.
2. Within five seconds of entering the code, press and hold the 7/8 button on the keypad.
3. Within five seconds of Step 2, and while holding the 7/8 button, press the 3/4 button on the keypad and release it.
4. Within five seconds of Step 3, release the 7/8 button on the keypad.

If the autolock feature is disabled, the horn chirps once. If the autolock feature is enabled, the horn chirps once shortly then sounds a second time for a longer sound of the horn once the above sequence is completed.

Autolock Enable/Disable - Using the Ignition Switch
Another way to turn the autolock off/on is by following this series of steps:
1. Close all the doors.
2. Confirm that the key is OFF.
3. Turn the key from OFF to RUN.

4. NOTE: Steps 4 through 7 must be carried out within 30 seconds.

Press the door lock control switch UNLOCK button three times.

5. Turn the key from ON to OFF.
6. Press the door lock control switch UNLOCK button three times.
7. Turn the key from OFF to ON.
8. Verify that the horn chirps. This indicates the enable/disable mode has been entered and is ready to program changes.
9. Press the door lock control switch UNLOCK button one time, then press the LOCK button.
10. Verify that the horn chirps one time, indicating that the autolock/relock feature is disabled. If one chirp is heard, followed by a longer sound of the horn, the autolock/relock feature is enabled. Return to Step 9.
11. Turn the key to the OFF position to exit the enable/disable mode. If the autolock status has changed the horn will chirp once. If the status has not changed, no chirp is heard. Return to Step 1.

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 control switch, and the key is in the ignition lock cylinder with the driver door open, the vehicle security module commands the driver door to UNLOCK.

Remote Transmitter Lock/Unlock Control - Unlock
The remote transmitter feature provides lock/unlock functions independently of key position, vehicle speed, or transmission position. The remote transmitter feature provides a two-step process for unlocking the doors. Upon receipt of the first requests 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 three seconds of the first, the remote transmitter feature will request that all doors be unlocked.

Remote Transmitter Lock/Unlock Control - Lock
The remote transmitter feature requests that all the doors be locked when the door lock control switch LOCK button is pressed. On any press of the LOCK button with all doors closed the remote transmitter feature requests one flash of the parking lamps. If any door is ajar, no flash will occur, indicating it locked all the doors but one or more doors are ajar. As soon as the last door is closed, the vehicle provides the one flash of the parking lamps. If two presses of the LOCK button are received within three seconds the horn chirps once, and 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 three seconds of the first, the remote transmitter feature requests the horn chirp twice without flashing the parking lamps to indicate it locked all the doors but one or more doors are ajar. When the key is in the ON or START position, no parking lamp flashes or horn chirp confirmations occur.

Panic Alarm
The panic alarm feature provides audible and visual alarms which are evident from the exterior of the vehicle. The panic alarm feature requests that the parking lamps are flashed and horn sounds until deactivation. The flashing of the outputs occurs simultaneously. Activation of the panic alarm is accomplished by pressing the PANIC button on a remote 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 remote transmitter PANIC button, 2) the key is switched out of the OFF or ACC position or; 3) a period of two minutes and forty-five seconds has elapsed since the initial activation.

Keyless Entry Keypad
The keyless entry keypad, located on the exterior of the driver door, provides a method for the customer to access their vehicle without a key or remote transmitter. The keyless entry keypad feature:
- locks all doors and inhibits the door lock control switch unlock capability after 20 seconds (if the inhibit feature is enabled).
- unlocks only the driver door.
- unlocks all doors.
- programs/erases customer key code.
- enables/disables autolocking.
- releases the liftgate glass.

The keyless entry keypad feature operates independently of key position status, vehicle speed, or transmission position. When a keypad button is pressed, the keypad buttons illuminate to provide better visibility. If LOCK ALL DOORS is entered or five seconds have elapsed since the last button press, the illumination is turned off.

Each vehicle equipped with a keyless entry keypad is programmed with a five-digit entry code. This code is provided to the customer through a wallet card in the owner literature package. In addition, this code is available through a diagnostic tool and is also printed on the vehicle security module label. When entering codes each digit must be entered within five seconds of the previous button press.

Programming/Erasing Personal Code
A unique personal five-digit code can be programmed by following these steps:
1. Enter the factory set five-digit code (the keypad will illuminate when pressed).
2. Press 1/2 within five seconds of Step 1.
3. Enter the unique five-digit code.

The personal code does not substitute for the permanent factory set code. Either code can be used to access the vehicle. In addition, if a second personal code is programmed, it overwrites the previous personal code. To erase a personal code, carry out the following procedure:
4. Enter factory set five-digit code.
5. Press 1/2 within five seconds of Step 1.
6. Press 7/8 and 9/0 at the same time within five seconds of Step 2.

The system now responds only to the factory set code.

Anti-Scan Feature
To provide added security, the keyless entry pad is disabled for one minute after 35 button presses without a valid entry code being entered. The keypad flashes during this one-minute mode with all functionality disabled except for 7/8 and 9/0 still being allowed to lock the vehicle.

Anti-Scan will be turned off after one minute of keypad inactivity.

Unlocking the Doors and Liftgate with the Keyless Entry Keypad System
To unlock the driver door, enter either the factory set code or the personal code (each digit must be pressed within five 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 control within five seconds.

To open the liftgate window glass, enter the factory set code or the personal code (driver door unlocks) and press the 5/6 control within five seconds.

Locking the Doors with the Keyless Entry 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 controls at the same time.