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Home >> Lexus >> 2021 >> LS 500h RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Active Noise Control System - Diagnostic Codes & Circuit Tests >> Active Noise Control System >> DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0293-87: Lost Communication With Hybrid Powertrain Control Module Missing Message; DTC U1151-87: Lost Communication with Hybrid Powertrain Control Module (C-Bus) Missing Message [10/2023 - ] >> Procedure
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DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0293-87: Lost Communication With Hybrid Powertrain Control Module Missing Message; DTC U1151-87: Lost Communication with Hybrid Powertrain Control Module (C-Bus) Missing Message [10/2023 - ]: Procedure

  1. CLEAR DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2017 - ]

      Body Electrical > Active Noise Control > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2017 - ]

      Body Electrical > Active Noise Control > Trouble Codes 

      OK

      DTC U0100-87, U0129-87, U0140-87 and U0164-87 are not output

      Result

      Proceed to
      OK
      NG

      HINT: 

      • If CAN communication system malfunction DTCs are output, they may also be output for other systems.
      • If the CAN communication system has been checked and repaired in other systems, the DTC will not be output after rechecking for DTCs.
      • If the DTC is output frequently, duplicate the conditions that cause a malfunction and perform the check again, even though the DTC was not output after rechecking for DTCs.

        Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ]

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

    Result: 

    NG 

    GO TO CAN COMMUNICATION SYSTEM 

    w/ Front LiDAR Sensor: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ]

    w/o Front LiDAR Sensor: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ]