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Home >> Toyota >> 2021 >> Highlander LE, FWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System (W/ AFS) - Diagnostic Codes (2 Of 2), Symptom Tests & Circuit Tests >> LIGHTING SYSTEM (w/ AFS) >> DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0100-87: Lost Communication With ECM/PCM "A" 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 U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0242-87: Lost Communication with Headlamp Control Module "B" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [11/2023 - ] >> Procedure
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DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0100-87: Lost Communication With ECM/PCM "A" 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 U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0242-87: Lost Communication with Headlamp Control Module "B" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [11/2023 - ]: Procedure

  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Headlight Control > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    2. Wait 30 seconds or more.
    3. Check for DTCs.

      Body Electrical > Headlight Control > 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 [12/2019 - ] 

    Result: 

    NG 

    GO TO CAN COMMUNICATION SYSTEM 

    for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]

    for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]