Passive Start - Keyless Vehicle Module (KVM)

Passive start - Keyless vehicle module (KVM)

Passive starting
Passive start can be initiated at different times. The system gets an indication that the vehicle is about to be started when switch by start button (IAU) closes when the button is pressed in.
The brake or clutch pedal must be depressed in order for the vehicle to start. For further information about pre-start checks, see Design and Function, Immobilizer.
When a scan for a remote key begins, the internal antennas are activated and an encrypted request is transmitted. Keyless entry remote keys will reply encrypted in order, transmitting their identity number and codes. The keyless vehicle module (KVM) compares these codes with its own codes. As soon as a received code matches a programmed code, the remote key is validated and scanning will stop.
The keyless vehicle module (KVM) then sends an encrypted message to the central electronic module (CEM) that an approved remote key has been detected and validated. This validation takes a predetermined amount of time.
If the start button (IAU) is pressed, the central electronic module (CEM) transmits a message to the engine control module (ECM) to deactivate the system for the immobilizer, therefore allowing the engine to start. If the start button (IAU) is not pressed within a predefined time period, the remote key validation will expire. If the switch by the start button (IAU), or any of the contact breakers by the pedals are reactivated, the system will scan for remote keys again.