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Home >> Lexus >> 2019 >> GX 460 Base >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System (Diagnostic Codes & Circuit Tests) >> Pre-Collision System >> DTC B2090: Driving Support System Malfunction [08/2015 - 08/2019] >> Procedure
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DTC B2090: Driving Support System Malfunction [08/2015 - 08/2019]: Procedure

  1. CHECK FOR DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM) 
    1. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      OK

      Dynamic radar cruise control system DTCs are not output.

      RESULT

      Result Proceed to
      OK (w/o Lane Departure Alert System) A
      OK (w/ Lane Departure Alert System) B
      NG C

    Result: 

    See step  4

    Result: 

    GO TO DYNAMIC RADAR CRUISE CONTROL SYSTEM 

    (Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] )

    Result: 

    See step  2

  2. CHECK FOR DTC (PRE-COLLISION SYSTEM) 
    1. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      OK

      DTCs for Pre-Collision 2 are not output.

    Result: 

    NG 

    GO TO DIAGNOSTIC TROUBLE CODE CHART 

    (Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] )

    Result: 

    OK 

    See step  3

  3. CHECK FOR DTC 
    1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
    2. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      OK

      DTC B2090 is not output.

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

    Result: 

    NG 

    REPLACE SEAT BELT CONTROL ECU 

    (Refer to REMOVAL [08/2015 - 08/2019] )

  4. CHECK FOR DTC (LANE DEPARTURE ALERT SYSTEM) 
    1. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      OK

      Lane departure alert system DTCs are not output.

    Result: 

    NG 

    GO TO LANE DEPARTURE ALERT SYSTEM 

    (Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] )

    Result: 

    OK 

    See step  5

  5. CHECK FOR DTC (PRE-COLLISION SYSTEM) 
    1. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      OK

      DTCs for Pre-Collision 2 are not output.

    Result: 

    NG 

    GO TO DIAGNOSTIC TROUBLE CODE CHART 

    (Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] )

    Result: 

    OK 

    See step  6

  6. ADJUST LANE RECOGNITION CAMERA SENSOR ASSEMBLY 
    1. Adjust the lane recognition camera sensor assembly (Refer to ADJUSTMENT [08/2015 - 08/2019] ).

    Result: 

    NEXT 

    See step  7

  7. CHECK FOR DTC 
    1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
    2. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      OK

      DTC B2090 is not output.

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

    Result: 

    NG 

    REPLACE SEAT BELT CONTROL ECU 

    (Refer to REMOVAL [08/2015 - 08/2019] )