TL V6-3.2L (2004)
Messages are transmitted by an ECU (that monitors an input) over the communication circuit. ECUs that use the message (information related to that
input) are the receivers. For example, the combination switch control unit monitors the wiper switch. When the wiper switch is placed in the low speed
position, the combination switch control unit transmits that message on the communication circuit. The relay control module receives the message and
turns on the wipers by providing a ground for the relay.
