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Home >> Lexus >> 2019 >> GS 350 Base, RWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostic Codes & Circuit Tests >> Pre-Collision System >> DTC C1A20: Object Recognition ECU [09/2014 - 10/2015] >> Procedure
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DTC C1A20: Object Recognition ECU [09/2014 - 10/2015]: Procedure

  1. REPLACE LANE RECOGNITION CAMERA SENSOR ASSEMBLY 
    1. Replace the lane recognition camera sensor assembly with a new one (Refer to REMOVAL [09/2014 - 10/2015] ).

    Result: 

    NEXT 

    See step  2

  2. ADJUST LANE RECOGNITION CAMERA SENSOR ASSEMBLY 
    1. Adjust the lane recognition camera sensor assembly (Refer to ADJUSTMENT [09/2014 - 10/2015] ).

    Result: 

    NEXT 

    See step  3

  3. CHECK FOR DTC (PRE-COLLISION SYSTEM) 
    1. Clear DTCs (Refer to DTC CHECK / CLEAR [09/2014 - 10/2015] ).
    2. Make sure the following conditions are met:
      • Pre-collision system:

        The engine switch is on (IG).

      • Radar cruise control system:

        The vehicle is being driven at a speed of approximately 50 km/h (31 mph) or more and the distance control switch is on.

      • Lane keeping assist system:

        The vehicle is being driven at a speed of approximately 50 km/h (31 mph) or more and the lane keeping assist main switch is on.

    3. Check for DTCs.

      OK

      DTC C1A20 is not output.

      NOTE:

      When replacing the driving support ECU, always replace it with a new one and be sure to perform initialization (Refer to INITIALIZATION [09/2014 - 10/2015] ). If an ECU which was installed to another vehicle is used, the information stored in the ECU will not match the information from the vehicle, and as a result, a DTC may be stored.

    Result: 

    OK 

    END (LANE RECOGNITION CAMERA SENSOR ASSEMBLY WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE DRIVING SUPPORT ECU 

    (Refer to REMOVAL [09/2014 - 10/2015] )