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Home >> Toyota >> 2021 >> Sequoia TRD Pro >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Navigation System - Diagnostic Codes (2 Of 2) & Symptom Tests >> Navigation System >> DTC U0073: Sending Malfunction (Navigation to APGS); DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Meter ECU Communication; DTC U0164: Lost Communication with A/C ECU [08/2017 - 08/2019] >> Procedure
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DTC U0073: Sending Malfunction (Navigation to APGS); DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Meter ECU Communication; DTC U0164: Lost Communication with A/C ECU [08/2017 - 08/2019]: Procedure

  1. CHECK FOR DTC 
    1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2017 - 08/2019] ).
    2. Recheck for DTCs and check that no DTCs are output (Refer to DTC CHECK / CLEAR [08/2017 - 08/2019] ).

      OK

      No DTCs are output.

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - 08/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2018 - 08/2019] )

    Result: 

    NG 

    GO TO CAN COMMUNICATION SYSTEM 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - 08/2019] )