Home

Toyota Workshop

GSIC - Global Service Information Center

CAN COMMUNICATION SYSTEM > DIAGNOSIS SYSTEM

for Preparation Click here



ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM

  1. CAN No. 1 Bus

    1. ECM

    2. Power management control ECU

    3. Combination meter

    4. Main body ECU

    5. Power steering ECU

    6. Center airbag sensor assembly

    7. Skid control ECU (Brake booster with master cylinder)

    8. Steering angle sensor

    9. Yaw rate sensor

    10. Certification ECU

    11. Transmission control ECU

    12. Navigation ECU (Navigation receiver assembly)*1

  2. CAN No. 2 Bus

    1. Power management control ECU

    2. Driving support ECU*2

    3. Seat belt control ECU*3

    4. Parking assist ECU*4

  3. Power Management Bus

    1. Power management control ECU

    2. ECM

    3. Skid control ECU (Brake booster with master cylinder)

    4. Air conditioning amplifier

  4. Driving Support Bus*2

    1. Driving support ECU

    2. Millimeter wave radar sensor

      HINT:
      *1: w/ Navigation system
      *2: w/ Dynamic radar cruise control system
      *3: w/ Pre-crash safety system
      *4: w/ Intelligent parking assist system


CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION

  1. The systems (ECUs and sensors) that adopt CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed on the vehicle.

    ECU/Sensor Name
    		Intelligent Tester Display
    		Applicability
    ECM
    		Engine
    		Installed on all vehicles
    Power management ECU
    1. Hybrid Control
    2. Power Management1
    		Installed on all vehicles
    Transmission control ECU
    		Transmission Control
    		Installed on all vehicles
    Combination meter
    		Combination Meter
    		Installed on all vehicles
    Main body ECU
    		Main Body
    		Installed on all vehicles
    Power steering ECU
    		EPS
    		Installed on all vehicles
    Skid control ECU
    		ABS/VSC/TRC
    		Installed on all vehicles
    Steering angle sensor
    		Steering Angle Sensor
    		Installed on all vehicles
    Yaw rate sensor
    		Yaw Rate/Deceleration Sensor
    		Installed on all vehicles
    Center airbag sensor assembly
    		SRS Airbag
    		Installed on all vehicles
    Certification ECU
    		Entry and Start/Wireless Tuner
    		Installed on all vehicles
    Air conditioning amplifier
    		Air Conditioner
    		Installed on all vehicles
    Navigation ECU
    		AVN1
    		w/ Navigation system
    Driving support ECU
    		Cruise Control (ACC)
    		w/ Dynamic radar cruise control system
    Millimeter wave radar sensor
    		-
    		w/ Dynamic radar cruise control system
    Seat belt control ECU
    		Pre-Crash1
    		w/ Pre-crash safety system
    Parking assist ECU
    		Intelligent Parking Assist
    		w/ Intelligent parking assist system


BUS CHECK (COMMUNICATION MALFUNCTION DTC)

HINT:
Only CAN communication system DTCs for each ECU can be displayed on the intelligent tester.



    C128170

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



    2. C128171

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



    3. C128172

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


BUS CHECK (COMMUNICATION BUS CHECK)

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



    C128170

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



    2. C128171

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



    3. C128172

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

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



    4. C128179

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


DTC TABLE BY ECU

HINT:
  1. In the CAN communication system, CAN communication system DTCs can be displayed by the ECU using the intelligent tester.
  2. If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to How to Proceed with Troubleshooting (Click here).

  1. Power Management Control ECU / Intelligent tester Display "Hybrid Control"

    DTC Code
    		Detection Item
    U0100-211
    		Lost Communication with ECM/PCM "A"
    U0100-212
    		Lost Communication with ECM/PCM "A"
    U0100-530
    		Lost Communication with ECM/PCM "A"
    U0122-732*1
    		Lost Communication with Vehicle Dynamic Control Module
    U0129-220
    		Lost Communication with Brake System Control Module
    U0129-222
    		Lost Communication with Brake System Control Module
    U0129-527
    		Lost Communication with Brake System Control Module
    U0129-528
    		Lost Communication with Brake System Control Module
    U0140-146
    		Communication Error from Body ECU to HV ECU
    U0151-763
    		Communication Error from Airbag ECU to HV ECU
    U0164-594
    		Communication Error from A/C ECU to HV ECU
    U0164-827
    		Communication Error from A/C ECU to HV ECU
    U1104-728
    		Lost Communication with Driving Support ECU
    U1107-436
    		Lost Communication with Power Management Module

    HINT:
    1. DTC communication uses the CAN communication system.
    2. *1: Dynamic radar cruise control system DTC

  2. Power Management Control ECU / Intelligent tester Display "Electric Power Control"

    DTC Code
    		Detection Item
    U0129
    		Vehicle Speed Signal Communication
    U0140
    		Lost Communication with Body Control Module
    U0155
    		Lost Communication with Instrument Panel Cluster (IPC) Control Module
    U0293*2
    		HV ECU Communication

    HINT:
    1. DTC communication uses the CAN communication system.
    2. *2: If U0293 is output alone, CAN communication is normal. Refer to Entry and start System (Click here).

  3. Power Management Control ECU / Intelligent tester Display "Power Management1"

    DTC Code
    		Detection Item
    U0104
    		Lost Communication with Cruise Control Module
    U1002
    		Lost Communication with Gateway Module
    U1100
    		Lost Communication with Pre-Crash Module
    U110B
    		Lost Communication with Parking Assist Control Module "B"

    HINT:
    1. DTC communication uses the CAN communication system.
    2. "Power Management1" output DTC is communication error in the CAN No. 2 bus.

  4. Power Management Control ECU / Intelligent tester Display "Power Management2"

    DTC Code
    		Detection Item
    U0100
    		Lost Communication with ECM / PCM
    U0129
    		Lost Communication with Brake System Control Module
    U0164
    		Lost Communication with HVAC Control Module
    U1002
    		Lost Communication with Gateway Module

    HINT:
    1. DTC communication uses the CAN communication system.
    2. "Power Management2" output DTC is communication error in the power management bus.

  5. ECM / Intelligent tester Display "Engine"

    DTC Code
    		Detection Item
    U0293
    		Lost Communication with Hybrid Vehicle Control System

    HINT:
    DTC communication uses the CAN communication system.

  6. Transmission Control ECU/ Intelligent tester Display "Transmission Control"

    DTC Code
    		Detection Item
    U0146
    		Lost Communication with Body ECU

    HINT:
    DTC communication uses the CAN communication system.

  7. Power Steering ECU / Intelligent tester Display "EPS"

    DTC Code
    		Detection Item
    U0129
    		Lost Communication with Brake System Control Module
    U0293
    		Lost Communication with Hybrid Control Module
    U1104
    		Lost Communication with Driving Support ECU
    U1105
    		Lost Communication with Parking Assist ECU

    HINT:
    DTC communication uses the CAN communication system.

  8. Skid control ECU (Brake booster with master cylinder) / Intelligent tester Display "ABS/VSC/TRC"

    DTC Code
    		Detection Item
    U0073
    		Control Module Communication Bus OFF
    U0123
    		Lost Communication with Yaw Rate Sensor Module
    U0124
    		Lost Communication with Lateral Acceleration Sensor Module
    U0126
    		Lost Communication with Steering Angle Sensor Module
    U0293
    		Lost Communication with Hybrid Vehicle Control System

    HINT:
    DTC communication uses the CAN communication system.

  9. Steering Angle Sensor / Intelligent tester Display "Steering Angle Sensor"

    HINT:
    The steering angle sensor is connected to the CAN communication system, but CAN communication DTCs are not output.

  10. Yaw Rate Sensor / Intelligent tester Display "Yaw Rate / Deceleration Sensor"

    HINT:
    The yaw rate sensor is connected to the CAN communication system, but CAN communication DTCs are not output.

  11. Center Airbag Sensor Assembly / Intelligent tester Display "SRS Airbag"

    HINT:
    The center airbag sensor assembly is connected to the CAN communication system, but CAN communication DTCs are not output.

  12. Main Body ECU (w/ LED Headlight System or w/ Remote Air Conditioning System) / Intelligent tester Display "Main Body"

    DTC Code
    		Detection Item
    U0100
    		Lost Communication with ECM/ PCM "A"
    U0101
    		Lost Communication with TCM
    U0151
    		Lost Communication with Restraints Control Module
    U0155
    		Lost Communication with Instrument Panel Cluster
    U0164
    		Lost Communication with HVAC Control Module
    U0293
    		Lost Communication with Hybrid Powertrain Control Module
    U0327
    		Software Incompatibility with Vehicle Security
    U1133
    		Lost Communication with PMN Module

    HINT:
    DTC communication uses the CAN communication system.

  13. Main Body ECU (w/o LED Headlight System and w/o Remote Air Conditioning System) / Intelligent tester Display "Main Body"

    HINT:
    The main body ECU (w/o LED Headlight System and w/o Remote Air Conditioning System) is connected to the CAN communication system, but CAN communication DTCs are not output.

  14. Certification ECU / Intelligent tester Display "Entry and Start/ Wireless Tuner"

    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
    U0293
    		Lost Communication with HV ECU

    HINT:
    DTC communication uses the CAN communication system.

  15. Air Conditioning Amplifier / Intelligent tester Display "Air Conditioner"

    DTC Code
    		Detection Item
    U0100
    		Communication Malfunction (Engine ECU)
    U0101
    		Lost Communication with TCM
    U0131
    		Communication Malfunction (Electric Power Steering ECU)
    U0142
    		Communication Malfunction (Main body ECU)
    U0155
    		Communication Malfunction (Meter ECU)
    U0293
    		Communication Malfunction (Navigation ECU)

    HINT:
    DTC communication uses the CAN communication system.

  16. Combination Meter / Intelligent tester Display "Combination Meter"

    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

    HINT:
    DTC communication uses the CAN communication system.

  17. Navigation ECU (Navigation receiver assembly) / Intelligent tester Display "AVN1"

    DTC Code
    		Detection Item
    U0073
    		Sending Malfunction (Navigation to APGS)

    HINT:
    DTC communication uses the CAN communication system.

  18. Seat Belt Control ECU / Intelligent tester Display "Pre-Crash1"

    DTC Code
    		Detection Item
    U0122
    		Lost Communication with Vehicle Dynamics Control Module
    U0140
    		Lost Communication with J/B ECU
    U0151
    		Lost Communication with SRS Airbag ECU
    U1104
    		Lost Communication with Driving Support ECU

    HINT:
    DTC communication uses the CAN communication system.

  19. Driving Support ECU / Intelligent tester Display "Pre-Crash2"

    DTC Code
    		Detection Item
    U0122
    		Lost Communication with Vehicle Dynamics Control Module
    U0123
    		Lost Communication with Yaw Rate Sensor Module
    U0126
    		Lost Communication with Steering Angle Sensor Module
    U0235*3
    		Lost Communication with Cruise Control Front Distance Range Sensor
    U0293
    		Lost Communication with Hybrid Vehicle Control System
    U1002
    		Lost Communication with Gateway Module
    U1100
    		Lost Communication with Pre-Crash Module
    U1104
    		Lost Communication with Driving Support ECU
    U1119

    HINT:
    1. DTC communication uses the CAN communication system.
    2. *3: If U0235 is output alone, CAN communication is normal. Refer to Dynamic Radar Cruise Control System (Click here).

  20. Driving Support ECU / Intelligent tester Display "Cruise Control (ACC)"

    DTC Code
    		Detection Item
    U0122
    		Lost Communication with Vehicle Dynamics Control Module
    U0123
    		Lost Communication with Yaw Rate Sensor Module
    U0126
    		Lost Communication with Steering Angle Sensor Module
    U0235*3
    		Lost Communication with Cruise Control Front Distance Range Sensor
    U0293
    		Lost Communication with Hybrid Vehicle Control System
    U1104
    		Lost Communication with Driving Support ECU

    HINT:
    1. DTC communication uses the CAN communication system.
    2. *3: If U0235 is output alone, CAN communication is normal. Refer to Dynamic Radar Cruise Control System (Click here).

  21. Parking Assist ECU / Intelligent tester Display "Intelligent Parking Assist"

    DTC Code
    		Detection Item
    U0073
    		Control Module Communication Bus Off
    U0126
    		Lost Communication with Steering Angle Sensor Module
    U0129
    		Lost Communication with Brake System Control Module
    U0131
    		Lost Communication with Power Steering Control Module
    U0140
    		Lost Communication with Body Control Module
    U0293
    		Lost Communication with Hybrid Control Module
    U1000*4
    		CAN Communication Failure (Message Registry)

    HINT:
    1. DTC communication uses the CAN communication system.
    2. *4: If U1000 is output alone, CAN communication is normal. Refer to Parking Assist System (Click here).

  22. Millimeter Wave Radar Sensor

    HINT:
    The millimeter wave radar sensor is connected to the CAN communication system, but CAN communication DTCs are not output.


DTC COMBINATION TABLE

  1. CAN No. 1 Bus

    DTC
    		Trouble Mode
    Output ECU
    		Output DTC
    		Power Management ECU Communication Stop Mode
    		ECM Communication Stop Mode
    		Main Body ECU Communication Stop Mode
    		Combination Meter ECU Communication Stop Mode
    Power management control ECU
    (Hybrid Control)
    		U0100
    		â—‹*1
    		â—‹
    		X
    		X
    U0122
    		â—‹*1
    		X
    		X
    		X
    U0129
    		â—‹*1
    		X
    		X
    		X
    U0140
    		â—‹*1
    		X
    		â—‹
    		X
    U0151
    		â—‹*1
    		X
    		X
    		X
    O1107
    		â—‹*1
    		X
    		X
    		X
    Power management control ECU
    (Electric Power Control)
    		U0129
    		â—‹*1
    		X
    		X
    		X
    U0140
    		â—‹*1
    		X
    		â—‹
    		X
    U0155
    		â—‹*1
    		X
    		X
    		â—‹
    U0293
    		â—‹
    		X
    		X
    		X
    ECM
    		U0293
    		â—‹
    		â—‹*1
    		X
    		X
    Transmission control ECU
    		U0146
    		X
    		X
    		â—‹
    		X
    Main body ECU*3
    		U0100
    		X
    		â—‹
    		â—‹*1
    		X
    U0101
    		â—‹
    		X
    		â—‹*1
    		X
    U0151
    		X
    		X
    		â—‹*1
    		X
    U0155
    		X
    		X
    		â—‹*1
    		â—‹
    U0164
    		â—‹*4
    		X
    		â—‹*1
    		X
    U0293
    		â—‹
    		X
    		â—‹*1
    		X
    U0327
    		X
    		X
    		â—‹*1
    		X
    U1133
    		â—‹
    		X
    		â—‹*1
    		X
    Combination meter
    		U0100
    		X
    		â—‹
    		X
    		â—‹*1
    U0129
    		X
    		X
    		X
    		â—‹*1
    U0131
    		â—‹
    		X
    		X
    		â—‹*1
    U0142
    		X
    		X
    		â—‹
    		â—‹*1
    U0151
    		X
    		X
    		X
    		â—‹*1
    Skid control ECU
    		U0073
    		X
    		X
    		X
    		X
    U0123
    		X
    		X
    		X
    		X
    U0124
    		X
    		X
    		X
    		X
    U0126
    		X
    		X
    		X
    		X
    U0293
    		â—‹
    		X
    		X
    		X
    Power steering ECU
    		U0129
    		X
    		X
    		X
    		X
    U0293
    		â—‹
    		X
    		X
    		X
    U1104
    		â—‹*5
    		X
    		X
    		X
    U1105
    		â—‹*5
    		X
    		X
    		X
    Certification ECU
    		U0100
    		X
    		â—‹
    		X
    		X
    U0142
    		X
    		X
    		â—‹
    		X
    U0155
    		X
    		X
    		X
    		â—‹
    U0293
    		â—‹
    		X
    		X
    		X
    Navigation ECU
    		U0073
    		X
    		X
    		X
    		X

    DTC
    		Trouble Mode
    Output ECU
    		Output DTC
    		Power Steering ECU Communication Stop Mode
    		Skid Control ECU Communication Stop Mode
    		Steering Angle Sensor Communication Stop Mode
    		Yaw Rate Sensor Communication Stop Mode
    Power management control ECU
    (Hybrid Control)
    		U0100
    		X
    		X
    		X
    		X
    U0122
    		X
    		â—‹
    		X
    		X
    U0129
    		X
    		â—‹
    		X
    		X
    U0140
    		X
    		X
    		X
    		X
    U0151
    		X
    		X
    		X
    		X
    U1107
    		X
    		X
    		X
    		X
    Power management control ECU
    (Electric Power Control)
    		U0129
    		X
    		â—‹
    		X
    		X
    U0140
    		X
    		X
    		X
    		X
    U0155
    		X
    		X
    		X
    		X
    U10293
    		X
    		X
    		X
    		X
    ECM
    		U0293
    		X
    		X
    		X
    		X
    Transmission control ECU
    		U0146
    		X
    		X
    		X
    		X
    Main body ECU*3
    		U0100
    		X
    		X
    		X
    		X
    U0101
    		X
    		X
    		X
    		X
    U0151
    		X
    		X
    		X
    		X
    U0155
    		X
    		X
    		X
    		X
    U0164
    		X
    		X
    		X
    		X
    U0293
    		X
    		X
    		X
    		X
    U0327
    		X
    		X
    		X
    		X
    U1133
    		X
    		X
    		X
    		X
    Combination meter
    		U0100
    		X
    		X
    		X
    		X
    U0129
    		X
    		â—‹
    		X
    		X
    U0131
    		â—‹
    		X
    		X
    		X
    U0142
    		X
    		X
    		X
    		X
    U0151
    		X
    		X
    		X
    		X
    Skid control ECU
    		U0073
    		X
    		â—‹*1, 2
    		X
    		â—‹
    U0123
    		X
    		â—‹*1
    		X
    		â—‹
    U0124
    		X
    		â—‹*1
    		X
    		â—‹
    U0126
    		X
    		â—‹*1
    		â—‹
    		X
    U0293
    		X
    		â—‹*1
    		X
    		X
    Power steering ECU
    		U0129
    		â—‹*1
    		â—‹
    		â—‹
    		â—‹
    U0293
    		â—‹*1
    		X
    		X
    		X
    U1104
    		â—‹*1
    		X
    		X
    		X
    U1105
    		â—‹*1
    		X
    		X
    		X
    Certification ECU
    		U0100
    		X
    		X
    		X
    		X
    U0142
    		X
    		X
    		X
    		X
    U0155
    		X
    		X
    		X
    		X
    U0293
    		X
    		X
    		X
    		X
    Navigation ECU
    		U0073
    		X
    		X
    		X
    		X

    DTC

    Output ECU
    		Output DTC
    		Center Airbag Sensor Communication Stop Mode
    		Certification ECU Communication Stop Mode
    		Transmission control Communication Stop Mode
    		Navigation ECU Communication Stop Mode
    Power management control ECU
    (Hybrid Control)
    		U0100
    		X
    		X
    		X
    		X
    U0122
    		X
    		X
    		X
    		X
    U0129
    		X
    		X
    		X
    		X
    U0140
    		X
    		X
    		X
    		X
    U0151
    		â—‹
    		X
    		X
    		X
    U1107
    		X
    		X
    		X
    		X
    Power management control ECU
    (Electric Power Control)
    		U0129
    		X
    		X
    		X
    		X
    U0140
    		X
    		X
    		X
    		X
    U0155
    		X
    		X
    		X
    		X
    U0293
    		X
    		X
    		X
    		X
    ECM
    		U0293
    		X
    		X
    		X
    		X
    Transmission control ECU
    		U0146
    		X
    		X
    		â—‹*1
    		X
    Main body ECU*3
    		U0100
    		X
    		X
    		X
    		X
    U0101
    		X
    		X
    		X
    		X
    U0151
    		â—‹
    		X
    		X
    		X
    U0155
    		X
    		X
    		X
    		X
    U0164
    		X
    		X
    		X
    		X
    U0293
    		X
    		X
    		X
    		X
    U0327
    		X
    		â—‹
    		X
    		X
    U1133
    		X
    		X
    		X
    		X
    Combination meter
    		U0100
    		X
    		X
    		X
    		X
    U0129
    		X
    		X
    		X
    		X
    U0131
    		X
    		X
    		X
    		X
    U0142
    		X
    		X
    		X
    		X
    U0151
    		â—‹
    		X
    		X
    		X
    Skid control ECU
    		U0073
    		X
    		X
    		X
    		X
    U0123
    		X
    		X
    		X
    		X
    U0124
    		X
    		X
    		X
    		X
    U0126
    		X
    		X
    		X
    		X
    U0293
    		X
    		X
    		X
    		X
    Power steering ECU
    		U0129
    		X
    		X
    		X
    		X
    U0293
    		X
    		X
    		X
    		X
    U1104
    		X
    		X
    		X
    		X
    U1105
    		X
    		X
    		X
    		X
    Certification ECU
    		U0100
    		X
    		â—‹*1
    		X
    		X
    U0142
    		X
    		â—‹*1
    		X
    		X
    U0155
    		X
    		â—‹*1
    		X
    		X
    U0293
    		X
    		â—‹*1
    		X
    		X
    Navigation ECU
    		U0073
    		X
    		X
    		X
    		â—‹*1

    HINT:
    1. â—‹: Set
    2. X: Not set or may be set according to the malfunctioning part when one side of the CAN branch wire opens.
    3. *1: DTC is not output during communication error, but will be output as a history DTC (past DTC) when communication returns to normal.
    4. *2: DTC U0100, U0123, U0124 and U0126 are not stored when DTC U0073 has already been stored.
    5. *3: w/ LED headlight system or w/ remote air conditioning system
    6. *4: If the power management bus circuit is normal
    7. *5: If the CAN No. 2 bus circuit is normal
    8. Skid Control ECU Communication Stop Mode (Click here)
    9. Power Steering ECU Communication Stop Mode (Click here)
    10. Steering Angle Sensor Communication Stop Mode (Click here)
    11. Yaw Rate Sensor Communication Stop Mode (Click here)
    12. ECM Communication Stop Mode (Click here)
    13. Transmission Control ECU Communication Stop Mode (Click here)
    14. Main Body ECU Communication Stop Mode (Click here)
    15. Combination Meter ECU Communication Stop Mode (Click here)
    16. Center Airbag Sensor Communication Stop Mode (Click here)
    17. Certification ECU Communication Stop Mode (Click here)
    18. Power Management ECU Communication Stop Mode (Click here)