System Overview: Signals

The table below summarizes the input signals to and output signals from the central electronic module (CEM). The signal types are divided into serial communication and controller area network (CAN) communication. No directly connected signals are included in the function.

CENTRAL ELECTRONIC MODULE (CEM) (4/56):

Input signals	Output signals
Via serial communication:	Via serial communication:
Remote Receiver Module (RRX) Remote keyless entry (RKE) (only vehicles with the keyless function)	Remote Receiver Module (RRX) Remote keyless entry (RKE) (only vehicles with the keyless function)
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Keyless vehicle module (KVM) (if installed. Signals from the Remote Keyless Entry (RKE))	Driver information module (DIM) Keyless vehicle module (KVM) (if installed. Commands to the Remote Keyless Entry (RKE))