Keyless Function

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2013 Volvo C70, 2012 Volvo C70, 2011 Volvo C70, 2010 Volvo C70, and 2009 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Keyless Function

Courtesy of VOLVO CARS CORPORATION

When the system for keyless locking system is installed it is Keyless vehicle module (KVM) that checks the key's identity when unlocking and locking. After this check, Keyless vehicle module (KVM) sends a command to Central electronic module (CEM) that the central locks shall be unlocked or locked.

Keyless vehicle module (KVM) checks the key's identity using antennas in the external handles on the side doors (C30/C70 front doors, S40/V50 rear doors) and in the rear bumper.

The 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 or more of the outer antennas to check the identity of the key. If the 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 key in the vicinity of the vehicle. If the key is approved, the keyless vehicle module (KVM) transmits a signal to the central electronic module (CEM) to lock the vehicle.