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Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Stop And Start System - Diagnostic Codes (2 Of 2) & Circuit Tests (1 Of 3)) >> Stop And Start System >> DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module 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 U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication With Brake System Control Module (ch2) Missing Message [03/2024 - ] >> Procedure

DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module 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 U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication With Brake System Control Module (ch2) Missing Message [03/2024 - ]: Procedure

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  1. CLEAR DTC 
    1. Clear the DTCs.

      Powertrain > Stop and Start > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK DTC OUTPUT 
    1. Turn the ignition switch off and wait for 30 seconds or more.
    2. Start the engine.
    3. Perform a road test.
    4. Read the DTCs.

      Powertrain > Stop and Start > Trouble Codes 

      Result

      Result Proceed to
      DTC U0100-87, U0101-87, U0103-87, U0126-87, U0129-87, U0140-87, U0151-87, U0155-87, U0164-87, U115C-87 or U1170-87 is output A
      DTC U0100-87, U0101-87, U0103-87, U0126-87, U0129-87, U0140-87, U0151-87, U0155-87, U0164-87, U115C-87 or U1170-87 is not output B

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]