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Home >> Lexus >> 2011 >> LX 570 >> Repair and Diagnosis (Single Page) >> Steering >> Steering Gear >> Variable Gear Ratio Steering System (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 (08/2010 - 08/2011) >> 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 (08/2010 - 08/2011): 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 → See step   2 

  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