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Home >> Lexus >> 2023 >> NX 250 AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (3 Of 3), Symptom Tests & Circuit Tests >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> Yaw Rate Sensor Wrong Installation (X0456) [11/2021 - ] >> Procedure

Yaw Rate Sensor Wrong Installation (X0456) [11/2021 - ]: Procedure

  1. CHECK FOR DTCs (HEALTH CHECK) 
    1. Perform the Health Check using the GTS.

      Result

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

    Result: 

    B 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer To  DIAGNOSTIC TROUBLE CODE CHART [11/2021 - ] 

    Result: 

    A 

    See step  2

  2. READ VALUE USING GTS (YAW RATE SENSOR VALUE) 
    1. Check Data List item "yaw rate sensor value".

      Chassis > Brake/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Yaw Rate Sensor Value Yaw rate sensor Min.: -128°/s, Max.: 127°/s Vehicle stopped: 0°/s
      Turning right: -128 to 0°/s
      Turning left: 0 to 127°/s      		 -

      Chassis > Brake/EPB > Data List 

      Tester Display
      Yaw Rate Sensor Value

      Result

      Result Proceed to
      NG (The yaw rate sensor (airbag sensor assembly) output value is 0°/s when the vehicle is stationary, but the value fluctuates when turning.) A
      NG (The yaw rate sensor (airbag sensor assembly) output value is not 0°/s when the vehicle is stationary.) B
      OK C

    Result: 

    B 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [11/2021 - 03/2024]  , or refer to  REMOVAL [03/2024 - ] 

    Result: 

    C 

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

    Result: 

    A 

    See step  3

  3. CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION 
    1. Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.

      Refer to INSTALLATION [11/2021 - 03/2024] , or refer to INSTALLATION [03/2024 - ]

      OK

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

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSTALL AIRBAG SENSOR ASSEMBLY. Refer to  INSTALLATION [11/2021 - 03/2024]  , or refer to  INSTALLATION [03/2024 - ] 

    Result: 

    OK 

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

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END 

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