Principles of Operation

PRINCIPLES OF OPERATION

The smart junction box (SJB) controls the exterior lighting of the vehicle. This system relies on the standard corporate protocol (SCP) communication network in order to transmit and receive signals. It is very important to understand:
- where the input (command) originates from.
- all information (messages) necessary in order for a feature to operate.
- which module(s) receive(s) the input or command message.
- if the module which received the input (message) controls the output of the feature, or does it output a message over the SCP communication network to another module.
- which module controls the output of the feature.

All turn signal lamps, cornering lamps, and signal mirror outputs are controlled by the SJB. The multifunction switch and the hazard switch are hard-wired to the SJB. When the multifunction switch is in the LH or RH turn position, or the hazard switch is engaged, the SJB processes this information and outputs the appropriate command to the turn signal and hazard lamps. All turn signal lamps provide a lamp outage indication.