LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2018 >> LS 500h AWD >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Dynamic Rear Steering System - Diagnostic Codes & Symptom Tests >> Dynamic Rear Steering System >> DTC C1B21: ECU Malfunction (CPU); DTC C1B22: ECU Malfunction (Internal Line); DTC C1B23: ECU Malfunction (Substrate Temperature Sensor); DTC C1B25: ECU Malfunction (Flash Memory) [10/2017 - 10/2020] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC C1B21: ECU Malfunction (CPU); DTC C1B22: ECU Malfunction (Internal Line); DTC C1B23: ECU Malfunction (Substrate Temperature Sensor); DTC C1B25: ECU Malfunction (Flash Memory) [10/2017 - 10/2020]: Procedure

  1. REPLACE DRS ECU (REAR STEERING CONTROL ECU) 
    1. Replace the DRS ECU (rear steering control ECU).

      Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END