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Home >> Infiniti >> 2008 >> M45 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Can Communication System) >> Can Communication System >> Diagnosis System

Diagnosis System

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. BUS CHECK 
    1. Select "CAN Bus Check" from the "System Select".
  2. CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION 
    1. Systems (ECUs and sensors) that use CAN communication vary depending on the vehicle's optional settings. Check which systems (ECUs and sensors) are installed on the vehicle.
      ECU/SENSOR NAME REFERENCE

      ECU/Sensor name (Tester display) Installed to
      Skid control ECU with actuator (ABS/VSC/TRAC) All vehicles
      Air conditioning amplifier (Air Conditioner) All vehicles
      ECM (Engine) All vehicles
      Main body ECU (Main Body) All vehicles
      Combination meter ECU (Combination Meter) All vehicles
      Center airbag sensor assembly (SRS Airbag) All vehicles
      Steering angle sensor (Steering Angle Sensor) All vehicles
      Bus buffer ECU (Accessory Gateway) Vehicle with bus buffer ECU (w/ Bus buffer ECU)
      4WD control ECU (Four Wheel Drive Control) Vehicle with 4 wheel drive (w/ 4WD)
      Front power seat control ECU and switch LH (Driver Seat) Vehicle with front power seat control system (w/ Seat memory)
      Outer mirror control ECU (Driver Door/Mirror) Vehicle with front power seat control system (w/ Seat memory)
      Multiplex tilt and telescopic ECU (Tilt & Telescopic) Vehicle with front power seat control system (w/ Seat memory)
  3. DTC TABLE BY ECU 

    HINT:

    • In the CAN communication system, CAN communication system DTCs output by the ECU can be displayed by using the Techstream.
    • 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. MULTIPLEX TILT AND TELESCOPIC ECU

      HINT:

      DTC communication uses the CAN communication system.

      DTC TABLE

      DTC No. Detection Item
      B2621 Communication Interruption
    2. MAIN BODY ECU

      HINT:

      DTC communication uses the CAN communication system.

      DTC TABLE

      DTC No. Detection Item
      U1002 Lost Communication with Gateway Module
      U0199 Lost Communication with "Door Control Module A"
      U0208 Lost Communication with "Seat Control Module A"
      U1115 Lost Communication with Tilt and Telescopic Module
    3. ECM

      For Vehicle with 2UZ-FE only.

      HINT:

      DTC communication uses the CAN communication system.

      DTC TABLE

      DTC No. Detection Item
      U0101 Lost Communication with TCM
    4. SKID CONTROL ECU WITH ACTUATOR

      HINT:

      DTC communication uses the CAN communication system.

      DTC TABLE

      DTC No. Detection Item
      U0073 Control Module Communication Bus OFF
      U0100 Lost Communication with ECM/PCM "A"
      U0114 Lost Communication with 4-Wheel Drive Clutch Control Module
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0124 Deceleration Sensor Communication Circuit Malfunction
      U0126 Lost Communication with Steering Angle Sensor Module
    5. COMBINATION METER ECU

      HINT:

      DTC communication uses the CAN communication system.

      DTC TABLE

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0129 Lost Communication with Brake System Control Module
    6. AIR CONDITIONING AMPLIFIER

      HINT:

      DTC communication uses the CAN communication system.

      DTC TABLE

      DTC No. Detection Item
      B1499 Multiplex Communication Circuit
    7. STEERING ANGLE SENSOR

      HINT:

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

    8. CENTER AIRBAG SENSOR

      HINT:

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

    9. 4WD CONTROL ECU

      For vehicle with 4 wheel drive only.

      HINT:

      The 4WD control ECU is connected to the CAN communication system but CAN communication DTCs are not output.

    10. BUS BUFFER ECU

      For vehicle with bus buffer ECU only.

      HINT:

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

    11. FRONT POWER SEAT CONTROL ECU AND SWITCH LH

      For vehicle with front power seat control system (w/ Seat memory) only.

      HINT:

      The front power control seat ECU and switch LH is connected to the CAN communication system but CAN communication DTCs are not output.

    12. OUTER MIRROR CONTROL ECU

      For vehicle with front power seat control system (w/ Seat memory) only.

      HINT:

      The outer mirror control ECU and switch LH is connected to the CAN communication system but CAN communication DTCs are not output.

  4. DTC COMBINATION TABLE 
    DTC COMBINATION REFERENCE TABLE

    Output from Output DTC Detection Item Detected Communication Stop Mode
    V Bus
    Main Body ECU Communication Stop Mode ECM Communication Stop Mode Skid Control ECU Communication Stop Mode Steering Angle Sensor Communication Stop Mode
    Multiplex Tilt and Telescopic ECU B2621 Communication Interruption - - - -
    Main Body ECU U1002 Lost Communication with Gateway Module - - - -
    U0208 Lost Communication with "Seat Control Module A" - - - -
    U0199 Lost Communication with "Door Control Module A" - - - -
    U1115 Lost Communication with Tilt and Telescopic Module - - - -
    ECM U0101 Lost Communication with TCM - ◦ - -
    Skid Control ECU with Actuator U0073 Control Module Communication Bus OFF - - - -
    U0100 Lost Communication with ECM/PCM "A" - ◦ - -
    U0114 Lost Communication with 4-Wheel Drive Clutch Control Module - - - -
    U0123 Lost Communication with Yaw Rate Sensor Module - - - -
    U0124 Deceleration Sensor Communication Circuit Malfunction - - - -
    U0126 Lost Communication with Steering Angle Sensor Module - - - ◦
    Combination Meter ECU U0100 Lost Communication with ECM/PCM "A" - ◦ - -
    U0129 Lost Communication with Brake System Control Module - - ◦ -
    Air Conditioning Amplifier B1499*1 Multiplex Communication Circuit - ◦ - -
    HINT:
    • ◦: DTC is memorized.
    • □: Communication error status is memorized, (e.g., 1 wire disconnection)
    • *1: Only during failure status.
    DTC COMBINATION REFERENCE TABLE

    Output from Output DTC Detection Item Detected Communication Stop Mode
    V Bus
    Combination Meter ECU Communication Stop Mode Center Airbag Sensor Communication Stop Mode Air Conditioning Amplifier Communication Stop Mode 4WD Control ECU Communication Stop Mode
    Multiplex Tilt and Telescopic ECU B2621 Communication Interruption - - - -
    Main Body ECU U1002 Lost Communication with Gateway Module - - - -
    U0208 Lost Communication with "Seat Control Module A" - - - -
    U0199 Lost Communication with "Door Control Module A" - - - -
    U1115 Lost Communication with Tilt and Telescopic Module - - - -
    ECM U0101 Lost Communication with TCM - - - -
    Skid Control ECU with Actuator U0073 Control Module Communication Bus OFF - - - -
    U0100 Lost Communication with ECM/PCM "A" - - - -
    U0114 Lost Communication with 4-Wheel Drive Clutch Control Module - - - ◦
    U0123 Lost Communication with Yaw Rate Sensor Module - - - -
    U0124 Deceleration Sensor Communication Circuit Malfunction - - - -
    U0126 Lost Communication with Steering Angle Sensor Module - - - -
    Combination Meter ECU U0100 Lost Communication with ECM/PCM "A" ◦ - - -
    U0129 Lost Communication with Brake System Control Module ◦ - - -
    Air Conditioning Amplifier B1499*1 Multiplex Communication Circuit - - ◦ -
    HINT:
    • ◦: DTC is memorized.
    • □: Communication error status is memorized, (e.g., 1 wire disconnection)
    • *1: Only during failure status.
    DTC COMBINATION REFERENCE

    Output from Output DTC Detection Item Detected Communication Stop Mode
    MS Bus
    Front Power Seat Control ECU and Switch LH Communication Stop Mode Outer Mirror Control ECU Communication Stop Mode Multiplex Tilt and Telescopic ECU Communication Stop Mode Main Body ECU Communication Stop Mode
    Multiplex Tilt and Telescopic ECU B2621 Communication Interruption ◦ - ◦ ◦
    Main Body ECU U1002 Lost Communication with Gateway Module - - - ◦
    U0208 Lost Communication with "Seat Control Module A" ◦ - - ◦
    U0199 Lost Communication with "Door Control Module A" - ◦ - ◦
    U1115 Lost Communication with Tilt and Telescopic Module - - ◦ ◦
    ECM U0101 Lost Communication with TCM - - - -
    Skid Control ECU with Actuator U0073 Control Module Communication Bus OFF - - - -
    U0100 Lost Communication with ECM/PCM "A" - - - -
    U0114 Lost Communication with 4-Wheel Drive Clutch Control Module - - - -
    U0123 Lost Communication with Yaw Rate Sensor Module - - - -
    U0124 Deceleration Sensor Communication Circuit Malfunction - - - -
    U0126 Lost Communication with Steering Angle Sensor Module - - - -
    Combination Meter ECU U0100 Lost Communication with ECM/PCM "A" - - - -
    U0129 Lost Communication with Brake System Control Module - - - -
    Air Conditioning Amplifier B1499*1 Multiplex Communication Circuit - - - -
    HINT:
    • ◦: DTC is memorized.
    • □: Communication error status is memorized, (e.g., 1 wire disconnection)
    • *1: Only during failure status.
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