SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 515 (MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSIS)SYSTEM DESCRIPTION
2004 Toyota Matrix XR, FWD, Standard

System Description

2004 Toyota Matrix XR, FWD, StandardSECTION System Description
WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  • The PRIUS primarily uses the 3 types of multiplex communication systems described below.
    • The Controller Area Network (CAN) is a network of the vehicle control systems (engine electrical, chassis electrical, and hybrid system) and maintains communication between the ECUs.
    • The Body Electronics Area Network (BEAN) is a network of the ECUs of the body electric system control and maintains communication between the ECUs.
    • The Audio Visual Communication-Local Area Network (AVC-LAN) is a network of the ECUs of the audio visual system and the audio visual devices and maintains communication between the devices and the ECUs.
  • These 3 types of multiplex communication systems are connected to the gateway ECU. The gateway ECU, which is provided with communication circuits that support the 3 types of multiplex communication systems, enables communication among the multiplex communication systems that are connected to the gateway ECU.

    For example, to enable air conditioning control, the air conditioning ECU receives the engine coolant temperature signal that is input into the ECM via the CAN, gateway ECU and BEAN.

    Fig 1: Multiplex Communication System Description
    G02919769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • The CAN in the PRIUS is established among the HV ECU, battery ECU, EPS ECU, ECM, skid control ECU, steering angle sensor*, yaw rate & deceleration sensor*, gateway ECU and DLC3.

    CAN System Diagram 

    Fig 2: Multiplex Communication CAN System Diagram
    G02919770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • The BEAN in the PRIUS is established among the body ECU, meter ECU, A/C ECU, transponder key ECU, power source control ECU, transmission control ECU, smart ECU*, and gateway ECU.

    BEAN System Diagram 

    Fig 3: Multiplex Communication BEAN System Diagram
    G02919771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • The AVC-LAN is established among the multi - display, audio head unit, navigation ECU* and gateway ECU.

    AVC-LAN System Diagram 

    Fig 4: Multiplex Communication AVC-LAN System Diagram
    G02919772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.