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Home >> Toyota >> 2019 >> 86 Base, Standard Trans >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Smart Key System (Keyless Start) - Diagnostic Codes & Symptom Tests >> SMART KEY SYSTEM (for Start Function) >> Diagnostic Codes >> DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; 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 Control Module (Combination Meter); DTC U0401: Invalid Data Received from ECM/PCM "A"; DTC U0422: Invalid Data Received from Body Control Module [03/2017 - ] >> Procedure
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DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; 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 Control Module (Combination Meter); DTC U0401: Invalid Data Received from ECM/PCM "A"; DTC U0422: Invalid Data Received from Body Control Module [03/2017 - ]: Procedure

  1. CHECK FOR DTC 
    1. Note any DTCs that are output (Refer to DTC CHECK / CLEAR [03/2017 - ] ).

    Result: 

    NEXT 

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ] 

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