System Diagram

MULTIPLEX COMMUNICATION SYSTEM (BEAN) DESCRIPTION
1. The BEAN communication line is used to control the following items:
  - Gateway ECU
  - Transponder key ECU
  - Main body ECU
  - Power window control switch rear LH
  - Power window control switch rear RH
  - Power window control switch front RH
  - Power window master switch
  - Remote control mirror ECU LH
  - Remote control mirror ECU RH
  - Power back door ECU
  - Power seat ECU (Driver side seat)
  - AFS ECU
  - Tilt and telescopic ECU
  - Tire pressure warning ECU
  - Air conditioning amplifier (A/C ECU)
  - Auto wiper ECU
  - Airbag sensor assembly
  - Combination meter ECU
  - Overhead J/B
  - Sliding roof control ECU (Moon roof control ECU)
  - Rain sensor
  - Center cluster integration panel
  If there is a short-circuit (bus-down) in the line, 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.
  
  Fig 1: Identifying Multiplex Communication System Diagram (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Identifying Multiplex Communication System Diagram (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. If DTC indicating ECU communication stop is output, the connectors may be disconnected or the communication buses may be open at 2 points. Only 1 communication bus open will not set DTC.
  
  Fig 3: Identifying ECU Communication Diagram (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. If 2 communication buses are open at the positions as shown in the illustration, DTC indicating ECU communication stop between those 2 buses is output.