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Home >> Lexus >> 2020 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Seats >> Front Power Seat Control System - Diagnostic Codes (2 Of 2) & Symptom Tests (1 Of 3) >> Front Power Seat 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 U0163-87: Lost Communication with Navigation Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0199-87: Lost Communication with "Door Control Module A" Missing Message; DTC U0200-87: Lost Communication with "Door Control Module B" Missing Message; DTC U0209-87: Lost Communication with "Seat Control Module B" Missing Message; DTC U0210-87: Lost Communication with "Seat Control Module C" Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1115-87: Lost Communication with Tilt & Telescopic Module Missing Message; DTC U1117-87: Lost Communication with Accessory Gateway Missing Message; DTC U114F-87: Lost Communication with Power Integration Module 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 U0163-87: Lost Communication with Navigation Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0199-87: Lost Communication with "Door Control Module A" Missing Message; DTC U0200-87: Lost Communication with "Door Control Module B" Missing Message; DTC U0209-87: Lost Communication with "Seat Control Module B" Missing Message; DTC U0210-87: Lost Communication with "Seat Control Module C" Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1115-87: Lost Communication with Tilt & Telescopic Module Missing Message; DTC U1117-87: Lost Communication with Accessory Gateway Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [10/2023 - ]: Procedure

  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Driver Seat > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    2. Wait 10 seconds or more.
    3. Check for DTCs.

      Body Electrical > Driver Seat > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    A 

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

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

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