LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2009 >> Matrix Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Can Communication System (Diagnostics & Circuit Tests)) >> Can Communication System >> Diagnosis System (To 12/2010) >> Diagnosis System
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis System

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. BUS CHECK 
    1. Using the Techstream, select "CAN Bus Check" from "System Select".
  2. CHECK FOR INSTALLED SYSTEMS (ECUS & SENSORS) THAT ADOPT CAN COMMUNICATION 
    1. Systems (ECUs, sensors) that adopt CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs, sensors) are installed on the vehicle.
      ECU / Sensor name Installed vehicles
      Skid control ECU Installed on all vehicles.
      Steering angle sensor Installed on all vehicles.
      Yaw rate sensor Installed on all vehicles.
      ECM Installed on all vehicles.
      ECT Installed on all vehicles.
      Network gateway ECU Installed on all vehicles.
      Navigation ECU w/ Navigation system
  3. DTC TABLE BY ECU 

    HINT: 

    • In the CAN communication system, CAN communication system DTCs of ECUs can be displayed using the Techstream.
    • If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to "HOW TO PROCEED WITH TROUBLESHOOTING". Refer to HOW TO PROCEED WITH TROUBLESHOOTING .
    1. SKID CONTROL ECU

      HINT: 

      DTC communication is via the CAN communication system.

      DTC No. Detection Item
      U0073 Control Module Communication Bus Off
      U0100 Lost Communication With ECM/PCM "A"
      U0123 Lost Communication With Yaw Rate Sensor Module
      U0124 Lost Communication With Lateral Acceleration Sensor Module
      U0126 Lost Communication With Steering Angle Sensor Module
    2. NAVIGATION RECEIVER ASSEMBLY (NAVIGATION ECU) (w/ Navigation system)

      HINT: 

      DTC communication is via the CAN communication system.

      DTC No. Detection Item
      U0073 CAN Communication Malfunction
    3. NETWORK GATEWAY ECU

      HINT: 

      The gateway ECU is connected to the CAN communication system but CAN communication system DTCs are not output.

  4. DTC COMBINATION TABLE 
    DTC Trouble Mode
    Output from Output DTC ECM Communication Stop Mode Skid Control ECU Communication Stop Mode Steering Angle Sensor Communication Stop Mode Yaw Rate Sensor Communication Stop Mode Network Gateway ECU Communication Stop Mode
    Skid Control ECU U0073 X ◦ X X X
    U0100 ◦ ◦ X X X
    U0123 X ◦ X ◦ X
    U0124 X ◦ X ◦ X
    U0126 X ◦ ◦ X X

    HINT: 

    • ◦: Set
    • X: Not set or may be set according to the malfunctioning part when one side of the CAN bus is open
scientia non olet · About LEMON Manuals