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Home >> Toyota >> 2025 >> GR86 Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning System - Diagnostic Codes & Symptom Tests >> Air Conditioning System >> DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0140: Lost Communication With Body Control Module; DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0401: Invalid Data Received From ECM/PCM "A"; DTC U0416: Invalid Data Received From Vehicle Dynamics Control Module; DTC U0422: Invalid Data Received From Body Control Module; DTC U0423: Invalid Data Received From Instrument Panel Cluster Control Module; DTC U1146: Lost Communication With Gateway "A" BODY-CAN [11/2021 - ] >> Procedure
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DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0140: Lost Communication With Body Control Module; DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0401: Invalid Data Received From ECM/PCM "A"; DTC U0416: Invalid Data Received From Vehicle Dynamics Control Module; DTC U0422: Invalid Data Received From Body Control Module; DTC U0423: Invalid Data Received From Instrument Panel Cluster Control Module; DTC U1146: Lost Communication With Gateway "A" BODY-CAN [11/2021 - ]: Procedure

  1. INSPECT CAN COMMUNICATION 

    HINT: 

    If CAN communication DTCs are output, refer to How to Proceed with Troubleshooting for the CAN communication system.

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END 

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