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Home >> Toyota >> 2015 >> Sienna LE, AWD >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Pre-Collision System - (Diagnostic Codes & Circuit Tests) >> Pre-Collision System >> DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0140: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Airbag ECU; DTC U1100: Lost Communication with Seat Belt Control ECU [08/2014 - ] >> Procedure
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DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0140: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Airbag ECU; DTC U1100: Lost Communication with Seat Belt Control ECU [08/2014 - ]: Procedure

  1. CHECK FOR DTCs (PRE-COLLISION 2) 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2014 - ] .
    2. Make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check the DTCs. Refer to DTC CHECK / CLEAR [08/2014 - ] .
      RESULT

      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

    B → See step   2 

    A → USE SIMULATION METHOD TO CHECK 

  2. GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ]