System Overview: Signals

The table below summarizes the input signals to and output signals from the trailer module . The signal types are divided into directly connected signals and CAN communication. The illustration below displays the same information with the Volvo component designations.

Input signals	Output signals
Directly connected:	Directly connected:
Stop lamp signal from right-hand stop lamp Stop lamp from Central electronic module	To tow hitch cable harness: Right turn signal lamp Left turn signal lamp Stop lamp right Stop lamp left Parking lamps Back-up lamp Fog lamps +12 V.
Via Controller Area Network communication:	Via Controller Area Network communication:
Central electronic module .	Central electronic module . Driver information module Differential electronic module Parking assistance module .

Fig 1: Identifying Signals

Courtesy of VOLVO CARS CORPORATION