Keyless Vehicle Module (KVM) (2008-2013): Function: Locking
Locking takes place when one of the lock buttons on the door handles is pressed in. A ground signal is sent from the lock button to the keyless vehicle module (KVM). The keyless vehicle module (KVM) then activated the antennas in the door handles on the side of the vehicle that the lock button was pressed. A request for a key is transmitted via the antennas. The response from the key is received by the remote keyless entry (TRX) receiver. The keyless vehicle module (KVM) checks the identity of the key against the its programmed codes. If the key is approved, the keyless vehicle module (KVM) transmits a signal to the central electronic module (CEM) to lock the vehicle. The vehicle cannot be locked from the luggage compartment/tailgate.
During a key check outside the vehicle, the internal antennas in the passenger and luggage compartment are also activated. This is to scan for any keys remaining inside the vehicle. If there are keys inside, the keyless vehicle module (KVM) will register their identities. Any signals from these keys will be ignored. This applies until the next time the vehicle is unlocked. This is to prevent remaining keys from being used to unlock or start the vehicle from outside using the starter switch. A deactivated key is reset when unlocking the vehicle, under the condition that they remain in the passenger compartment when unlocking, or if any of the locking buttons are depressed on the remote control that has been deactivated.
A key which is deactivated and then somehow removed from the vehicle, cannot be used to unlock or start the vehicle. To activate the key, it must be placed inside the vehicle during an unlocking procedure.
Locks the vehicle via command from the remote control, there is no communication between the keyless vehicle module (KVM) and the key. The keyless vehicle module (KVM) then only receives a message from the remote control, checks if the key is approved and then sends a lock command to the central electronic module (CEM). In this instances locking is fully controlled by the central electronic module (CEM). However, if any keys are left inside the vehicle, they will be deactivated in the same way as above.