LEMON Manuals: Even more car manuals for everyone
Home >> Volvo >> 2009 >> S80 Base >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Miscellaneous Electrical - Design And Function - 1 Of 5 >> Central Locking, Keyless Entry System (2007-2012) >> Function >> Keyless Function

Keyless Function

Fig 1: Identifying Keyless Vehicle Module (KVM) Components
GLL163037Courtesy of VOLVO CARS CORPORATION

If there is a keyless entry system, the keyless vehicle module (KVM) checks the identity of the remote key during locking and unlocking. After checking the key identity, the keyless vehicle module (KVM) then transmits a command to the central electronic module (CEM) to lock or unlock the central locking. The keyless vehicle module (KVM) uses the antennas in the outer handles on the side doors and in the rear bumper to check the identity of the remote key.

The remote key is checked when a handle on the side doors is pulled out or if the switch on the tailgate is activated. The keyless vehicle module (KVM) then activates one of the outer antennas to check the identity of the remote key. If the remote key is approved, the keyless vehicle module (KVM) transmits a signal to the central electronic module (CEM) which unlocks the vehicle.

The vehicle is locked using the lock buttons on the door handles. During locking, the antenna is also activated to check that there is an authorized remote key in the vicinity of the vehicle. If the remote key is approved, the keyless vehicle module (KVM) transmits a signal to the central electronic module (CEM) to lock the vehicle.