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Home >> Lexus >> 2010 >> LX 570 >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Variable Gear Ratio Steering (Diagnostic Codes & Symptom Tests) >> Variable Gear Ratio Steering System >> DTC U0100/56: Lost Communication with ECM / PCM "A"; DTC U0122/56: Lost Communication with Vehicle Dynamics Control Module; DTC U0126/56: Lost Communication with Steering Angle Sensor Module >> Procedure
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DTC U0100/56: Lost Communication with ECM / PCM "A"; DTC U0122/56: Lost Communication with Vehicle Dynamics Control Module; DTC U0126/56: Lost Communication with Steering Angle Sensor Module: Procedure

  1. CHECK DTC 
    1. Using the Techstream, check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM .
      RESULT

      Result Proceed to
      DTC is not output A
      DTC is output B

    B → See step   3 

    A: Go to next step 

  2. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
  3. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING