LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> GX 550 Overtrail >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (2 Of 2) & Symptom Tests >> Electronically Controlled Brake System >> Zero Point Calibration of Steering Angle Sensor Not Acquired (X20D8) [12/2023 - ] >> Procedure

Zero Point Calibration of Steering Angle Sensor Not Acquired (X20D8) [12/2023 - ]: Procedure

  1. CHECK FOR DTCs (HEALTH CHECK) 
    1. Using the GTS, perform the Health Check.

      Result

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

    Result: 

    GO TO DIAGNOSTIC TROUBLE CODE CHART 

    Result: 

    See step  2

  2. CHECK AIRBAG ECU ASSEMBLY INSTALLATION 
    1. Turn the ignition switch off.
    2. Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.

      Refer to INSTALLATION [12/2023 - ]

      OK

      The yaw rate and acceleration sensor (airbag ECU assembly) is tightened to the specified torque.

      The yaw rate and acceleration sensor (airbag ECU assembly) is not installed in a tilted position.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  3

  3. PERFORM ZERO POINT CALIBRATION OF STEERING SENSOR 
    1. Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.

      HINT: 

      When driving at a speed of 15 km/h or more for 1 second or more, the slip indicator light turns off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CLEAR VEHICLE CONTROL HISTORY (RoB) 
    1. Using the GTS, clear the Vehicle Control History (RoB).

      Chassis > Brake/EPB > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK VEHICLE CONTROL HISTORY (RoB) 
    1. Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.
    2. Using the GTS, check for Vehicle Control History (RoB).

      Chassis > Brake/EPB > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Result

      Result Proceed to
      X20D8 is not output A
      X20D8 is output B

    Result: 

    END 

    Result: 

    REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

  6. INSTALL AIRBAG ECU ASSEMBLY CORRECTLY 

    Refer to INSTALLATION [12/2023 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4