CAN COMMUNICATION SYSTEM (for LHD without Entry and Start System) DIAGNOSIS SYSTEM


  1. BUS CHECK (COMMUNICATION MALFUNCTION ECU)

    Only CAN communication system DTCs for each ECU can be output to the intelligent tester.


    1. A00O3HP

      Select "Bus Check" from the "System Select" screen on the intelligent tester.

    2. A00OALX

      Select "Communication Malfunction DTC" from the "Bus Check" screen, and then select "Enter".

    3. A00O57O

      Select the system of the DTC to be checked and select "Details".

    4. A00O8U0

      CAN communication system DTCs are output.

  2. BUS CHECK (COMMUNICATION BUS CHECK)

    Tech Tips

    The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the intelligent tester.


    1. A00OALX

      Select "Communication Bus Check" from the "Bus Check" screen.

    2. The screen displays the ECUs and sensors that are properly connected to the CAN communication system.

      Tech Tips


      • If any properly connected ECUs or sensors are not displayed, there is a communication stop in the system Click here.

      • A00O5TE

        The default item displayed in the combo box is "ALL". When checking the ECUs (sensors) connected to each bus, pull down the combo box and select the bus to be checked from the drop-down list. The drop-down list displays "ALL", "V Bus" and the names of the remaining buses.

        Combo Box Display Content
        ALL All ECUs (sensors) connected to the CAN bus
        V Bus ECUs (sensors) connected to the V Bus
        Bus Name ECUs (sensors) connected to the selected bus

      • The connection status (shown below) is indicated by the background color displayed behind the system name.

        ECU (Sensor) on V Bus
        Background Color Connection Status
        White Detected normally
        Yellow Could not be detected in the past, but is currently detected
        Red Detected in the past, but cannot be detected now
        Yellow Could not be detected in the past, but is currently detected
        Not displayed Has never been detected
        ECU (Sensor) with no Data Monitor History
        Background Color Connection Status
        White Detected normally
        Yellow Could not be detected in the past, but is currently detected
        Red Detected in the past, but cannot be detected now
        Not displayed Has never been detected
        ECU (Sensor) with Data Monitor History
        Background Color Connection Status
        White Detected normally
        Yellow Could not be detected in the past, but is currently detected
        Red Detected in the past, but cannot be detected now
        Red Has never been detected but has connection history
        Not displayed Has never been detected and has no connection history
    3. A00O56F

      "There is no system connected the communication bus." is displayed if there are no ECUs or sensors connected to the CAN bus.

  3. CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION


    1. Systems (ECUs and sensors) that use CAN communication vary depending on the optional settings of the vehicle. Check which systems (ECUs and sensors) are installed on the vehicle.

      ECU/Sensor Name Tester Display Installed on
      ECM ECM (Engine) for 2TR-FE
      Brake actuator assembly (skid control ECU [VSC ECU]) Skid Control (ABS/VSC/TRAC) for 2TR-FE
      Brake actuator assembly (skid control ECU [ABS ECU]) Skid Control (ABS/VSC/TRAC) for 5L-E
      Yaw rate sensor assembly Yaw Rate Sensor All vehicles
      Spiral cable sub-assembly (steering angle sensor) Spiral cable (Steering Angle Sensor) w/ Vehicle Stability Control System (for Vacuum Brake Booster)
      Power steering ECU assembly PPS for 2TR-FE
      Center airbag sensor assembly Airbag All vehicles
      Main body ECU (multiplex network body ECU) Main Body All vehicles
      Combination meter assembly Combination Meter All vehicles
      Display and navigation module display (AVN) Display and Navigation (AVN) w/ Navigation System
      Four wheel drive control ECU Four Wheel Drive Control All vehicles
      Air conditioning amplifier assembly Air Conditioning Amplifier All vehicles

  4. DTC TABLE BY ECU

    Tech Tips


    • In the CAN communication system, CAN communication system DTCs stored by the ECU can be output by using the intelligent tester.

    • If CAN communication system DTCs are output, the trouble cannot be determined solely from the DTCs. Perform troubleshooting according to "How to Proceed with Troubleshooting".


    1. ECM/ECT


      • For vehicles with a 2TR-FE engine.

      Tech Tips

      The ECM are connected to the CAN communication system but CAN communication DTCs are not stored.

    2. BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU [VSC ECU])


      • For vehicle with a 2TR-FE engine.

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0073 Control Module Communication Bus OFF
      U0100 Lost Communication with ECM/PCM "A"
      U0114 Lost Communication with 4WD Control Module
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0124 Lost Communication with Lateral Acceleration Sensor Module
      U0126 Lost Communication with Steering Angle Sensor Module

    3. BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU [ABS ECU])


      • For vehicle with a 5L-E engine.

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0073 Control Module Communication Bus OFF
      U0114 Lost Communication with 4WD Control Module
      U0124 Lost Communication with Lateral Acceleration Sensor Module

    4. MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0151 Lost Communication with Restraints Control Module
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module
      U0164 Lost Communication with HVAC Control Module

    5. COMBINATION METER ASSEMBLY

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0129 Lost Communication with Brake System Control Module
      U0131* Lost Communication with Power Steering Control Module
      U0142 Lost Communication with Body Control Module "B"
      U0151 Lost Communication with Restraints Control Module

      • *: for 2TR-FE

    6. CENTER AIRBAG SENSOR ASSEMBLY

      Tech Tips

      The center airbag sensor assembly is connected to the CAN communication system but CAN communication DTCs are not stored.

    7. AIR CONDITIONING AMPLIFIER ASSEMBLY

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0142 Lost Communication with Body Control Module "B"
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module

    8. YAW RATE SENSOR ASSEMBLY

      Tech Tips

      The yaw rate sensor assembly is connected to the CAN communication system but CAN communication DTCs are not stored.

    9. SPIRAL CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR)


      • For vehicle with a vehicle stability control system (for vacuum brake booster).

      Tech Tips

      The steering angle sensor is connected to the CAN communication system but CAN communication DTCs are not stored.

    10. POWER STEERING ECU ASSEMBLY


      • For vehicle with a 2TR-FE engine.

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0073 Control Module Communication Bus OFF

    11. DISPLAY AND NAVIGATION MODULE DISPLAY (AVN)


      • For vehicles with a navigation system.

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0073 Sending Malfunction (Navigation to APGS)
      U0100 Engine ECU Communication
      U0126 Steering Sensor Communication
      U0155 Meter ECU Communication
      U0164 Air Conditioner ECU Communication

  5. DTC COMBINATION TABLE

    Tech Tips


    • ○: Stored.

    • X: When one side of branch wire is open, storage may occur.

    • -: Not stored.

    • *1: Only stored when communication recovery has occurred. During communication stop, cannot be stored.

    • *2: Only output while a malfunction present and the ignition switch is ON.

    • *3: except 5L-E

    • *4: w/ Vehicle Stability Control System (for Vacuum Brake Booster)

    • *5: w/o Vehicle Stability Control System (for Vacuum Brake Booster)

    V1 Bus Vol. 1
    Output from Output DTC Detection Item Detected Communication Stop Mode
    V1 Bus
    Main Body ECU Communication Stop Mode ECM Communication Stop Mode*3 Brake Actuator (Skid Control ECU) Communication Stop Mode
    Main body ECU (multiplex network body ECU) U0100*3 Lost Communication with ECM/PCM "A" ○*1 ○ X*4
    -*5
    U0151 Lost Communication with Restraints Control Module ○*1 X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module ○*1 X X
    U0164 Lost Communication with HVAC Control Module ○*1 X X*4
    -*5
    Brake actuator assembly (skid control ECU [VSC ECU]) U0073 *2 Control Module Communication Bus Off X X ○*1, *4
    -*5
    U0100*2 Lost Communication with ECM/PCM "A" X X ○*1, *4
    -*5
    U0114*2 Lost Communication with 4WD Control Module X X ○*1, *4
    -*5
    U0123 *2 Lost Communication with Yaw Rate Sensor Module X X ○*1, *4
    -*5
    U0124 *2 Lost Communication with Lateral Acceleration Sensor Module X X ○*1, *4
    -*5
    U0126 *2 Lost Communication with Steering Angle Sensor Module X X ○*1, *4
    -*5
    Brake actuator assembly (skid control ECU [ABS ECU]) U0073 Control Module Communication Bus Off X X -*4
    ○*1, *5
    U0114 Lost Communication with 4WD Control Module X X -*4
    ○*1, *5
    U0124 Lost Communication with Lateral Acceleration Sensor Module X X -*4
    ○*1, *5
    Power steering ECU assembly U0073 Control Module Communication Bus Off X X X*4
    -*5
    Combination meter assembly U0100*3 Lost Communication with ECM/PCM "A" X ○ X
    U0129 Lost Communication with Brake System Control Module X X ○*4
    X*5
    U0131 Lost Communication with Power Steering Control Module X X X
    U0142 Lost Communication with Body Control Module "B" ○ X X
    U0151 Lost Communication with Restraints Control Module X X X
    Display and navigation module display (AVN) U0073 Sending Malfunction (Navigation to APGS) X X X*4
    -*5
    U0100 Engine ECU Communication X ○ X*4
    -*5
    U0126 Steering Sensor Communication X X X*4
    -*5
    U0155 Meter ECU Communication X X X*4
    -*5
    U0164 Air Conditioner ECU Communication X X X*4
    -*5
    Air conditioning amplifier assembly U0100*3 Lost Communication with ECM/PCM "A" X ○ X
    U0142 Lost Communication with Body Control Module "B" ○ X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X
    V1 Bus Vol. 2
    Output from Output DTC Detection Item Detected Communication Stop Mode
    V1 Bus
    Yaw Rate Sensor Communication Stop Mode Steering Angle Sensor Communication Stop Mode Power Steering ECU Communication Stop Mode Center Airbag Sensor Communication Stop Mode
    Main body ECU (multiplex network body ECU) U0100*3 Lost Communication with ECM/PCM "A" X X X X
    U0151 Lost Communication with Restraints Control Module X X X ○
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X X
    U0164 Lost Communication with HVAC Control Module X X X X
    Brake actuator assembly (skid control ECU [VSC ECU]) U0073 *2 Control Module Communication Bus Off X X X X
    U0100*2 Lost Communication with ECM/PCM "A" X X X X
    U0114*2 Lost Communication with 4WD Control Module X X X X
    U0123 *2 Lost Communication with Yaw Rate Sensor Module ○ X X X
    U0124 *2 Lost Communication with Lateral Acceleration Sensor Module ○ X X X
    U0126 *2 Lost Communication with Steering Angle Sensor Module X ○ X X
    Brake actuator assembly (skid control ECU [ABS ECU]) U0073 Control Module Communication Bus Off X - - X
    U0114 Lost Communication with 4WD Control Module X - - X
    U0124 Lost Communication with Lateral Acceleration Sensor Module ○ - - X
    Power steering ECU assembly U0073 Control Module Communication Bus Off X X ○*1 X
    Combination meter assembly U0100*3 Lost Communication with ECM/PCM "A" X X X X
    U0129 Lost Communication with Brake System Control Module X X X X
    U0131 Lost Communication with Power Steering Control Module X X ○ X
    U0142 Lost Communication with Body Control Module "B" X X X X
    U0151 Lost Communication with Restraints Control Module X X X ○
    Display and navigation module display (AVN) U0073 Sending Malfunction (Navigation to APGS) X X X X
    U0100 Engine ECU Communication X X X X
    U0126 Steering Sensor Communication X ○ X X
    U0155 Meter ECU Communication X X X X
    U0164 Air Conditioner ECU Communication X X X X
    Air conditioning amplifier assembly U0100*3 Lost Communication with ECM/PCM "A" X X X X
    U0142 Lost Communication with Body Control Module "B" X X X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X X
    V1 Bus Vol. 3
    Output from Output DTC Detection Item Detected Communication Stop Mode
    V1 Bus
    Combination Meter ECU Communication Stop Mode Display and Navigation Assembly Communication Stop Mode*3 4WD Control ECU Communication Stop Mode Air Conditioning Amplifier Communication Stop Mode
    Main body ECU (multiplex network body ECU) U0100*3 Lost Communication with ECM/PCM "A" X X X X
    U0151 Lost Communication with Restraints Control Module X X X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module ○ X X X
    U0164 Lost Communication with HVAC Control Module X X X X
    Brake actuator assembly (skid control ECU [VSC ECU]) U0073 *2 Control Module Communication Bus Off X X X X
    U0100*2 Lost Communication with ECM/PCM "A" X X X X
    U0114*2 Lost Communication with 4WD Control Module X X ○ X
    U0123 *2 Lost Communication with Yaw Rate Sensor Module X X X X
    U0124 *2 Lost Communication with Lateral Acceleration Sensor Module X X X X
    U0126 *2 Lost Communication with Steering Angle Sensor Module X X X X
    Brake actuator assembly (skid control ECU [ABS ECU]) U0073 Lost Communication with Lateral Acceleration Sensor Module X - X X
    U0114 Lost Communication with 4WD Control Module X - ○ X
    U0124 Lost Communication with Lateral Acceleration Sensor Module X - X X
    Power steering ECU assembly U0073 Control Module Communication Bus Off X X X X
    Combination meter assembly U0100*3 Lost Communication with ECM/PCM "A" ○*1 X X X
    U0129 Lost Communication with Brake System Control Module ○*1 X X X
    U0131 Lost Communication with Power Steering Control Module ○*1 X X X
    U0142 Lost Communication with Body Control Module "B" ○*1 X X X
    U0151 Lost Communication with Restraints Control Module ○*1 X X X
    Display and navigation module display (AVN) U0073 Sending Malfunction (Navigation to APGS) X ○*1 X X
    U0100 Engine ECU Communication X ○*1 X X
    U0126 Steering Sensor Communication X ○*1 X X
    U0155 Meter ECU Communication ○ ○*1 X X
    U0164 Air Conditioner ECU Communication X ○*1 X ○
    Air conditioning amplifier assembly U0100*3 Lost Communication with ECM/PCM "A" X X X ○*1
    U0142 Lost Communication with Body Control Module "B" X X X ○*1
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module ○ X X ○*1