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Home >> Lexus >> 2024 >> LX 600 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System (W/O Adaptive High Beam System) - Diagnostic Codes & Circuit Tests >> LIGHTING SYSTEM (w/o Adaptive High Beam System) >> DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0241-87: Lost Communication with Headlamp Control Module "A" Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [12/2021 - ] >> Procedure
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DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0241-87: Lost Communication with Headlamp Control Module "A" Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [12/2021 - ]: Procedure

  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Headlight Control (Sub) > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 

    Pre-procedure1

    • Turn the ignition switch to ON and wait for at least 10 seconds or more.
    • Check for DTCs.

      Body Electrical > Headlight Control (Sub) > Trouble Codes 

      Result

      Result Proceed to
      U0126-87, U0129-87, U0140-87, U0155-87, U0241-87 or U114F-87 is output A
      U0126-87, U0129-87, U0140-87, U0155-87, U0241-87 and U114F-87 are not output B

    Post-procedure1

    • None

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ] 

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ]