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Home >> Toyota >> 2018 >> 86 Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission System [TX6A] - Diagnostic Codes & Circuit Tests >> Automatic Transmission System >> Diagnostic Codes >> 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 [06/2016 - ] >> Procedure
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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 [06/2016 - ]: Procedure

  1. CHECK OTHER DTC OUTPUT 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON and push the Techstream main switch on.
    3. Read the DTCs using the Techstream (Refer to DTC CHECK / CLEAR [06/2016 - ] ).

      Result

      Display (DTC output) Proceed to
      U0100, U0122, U0140 or U0155 A
      U0100, U0122, U0140 or U0155 and P160A B

    Result: 

    GO TO P160A 

    (Refer to DTC P160A: Internal Control Module Random Access Memory (RAM) Error [06/2016 - ] )

    Result: 

    See step  2

  2. CHECK DTC OUTPUT 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON and push the Techstream main switch on.
    3. Read the DTCs using the Techstream (Refer to DTC CHECK / CLEAR [06/2016 - ] ).

    Result: 

    NEXT 

    GO TO CAN COMMUNICATION SYSTEM 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2016 - 03/2017] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ] )