Multiplex Communication System

MULTIPLEX COMMUNICATION SYSTEM (BEAN)




a. The BEAN communication line is used to control the air bag sensor assy center (air bag ECU), the Engine Control Module (ECM), the air conditioner amplifier (A/C ECU), the combination meter assy, the multiplex network door ECU rear RH (power slide door ECU RH), the multiplex network door ECU back (power back door ECU) and the multiplex network door ECU rear LH (power slide door ECU LH). If there is a short-circuit (bus-down) in the line, the communication to the system that has a short-circuit (bus-down) will be disabled and the DTC concerning the system will be output from the multiplex network body ECU.




b. If DTC of ECU communication stop is output, connectors may be disconnected, or communication buses may be open at 2 points. It will not become abnormal with only 1 communication bus open.




c. If 2 communication buses are open at the position as shown in the illustration, DTC of ECU communication stop between those 2 buses is output.