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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Lighting System (Ext) - Diagnostic Codes & Circuit Tests (1 Of 2)) >> Lighting System >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0111-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message; DTC U0120-87: Lost Communication with Starter / Generator Control Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0168-87: Lost Communication with Vehicle Security Control Module Missing Message; DTC U0208-87: Lost Communication with "Seat Control Module A" Missing Message; DTC U0230-87: Lost Communication with Rear Gate Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U0241-87: Lost Communication with Headlamp Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message; DTC U1106-87: Lost Communication with Electric Parking Brake Module Missing Message; DTC U1117-87: Lost Communication with Accessory Gateway Missing Message [10/2023 - ] >> Procedure

DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0111-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message; DTC U0120-87: Lost Communication with Starter / Generator Control Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0168-87: Lost Communication with Vehicle Security Control Module Missing Message; DTC U0208-87: Lost Communication with "Seat Control Module A" Missing Message; DTC U0230-87: Lost Communication with Rear Gate Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U0241-87: Lost Communication with Headlamp Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message; DTC U1106-87: Lost Communication with Electric Parking Brake Module Missing Message; DTC U1117-87: Lost Communication with Accessory Gateway Missing Message [10/2023 - ]: Procedure

WARNING: This page is about a different car, the 2025 Toyota RAV4, 2024 Toyota RAV4, 2023 Toyota RAV4, and 2022 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Main Body > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    2. Wait 10 seconds or more.
    3. Turn the GTS on.
    4. Check for DTCs.

      Body Electrical > Main Body > Trouble Codes 

      OK

      DTCs are not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

    Result: 

    NG 

    GO TO CAN COMMUNICATION SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ]