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Home >> Lexus >> 2018 >> ES 300h >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Pre-Collision System (Diagnostic Codes & Circuit Tests) >> Pre-Collision System >> DTC C1A47: Steering Angle Sensor [07/2015 - ] >> Procedure

DTC C1A47: Steering Angle Sensor [07/2015 - ]: Procedure

  1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
    5. Check for electronically controlled brake system DTCs. Refer to DTC CHECK / CLEAR [07/2015 - ]
      RESULT

      Result Proceed to
      Electronically controlled brake system DTCs are not output A
      Electronically controlled brake system DTCs are output B

      HINT: 

      If the steering sensor is malfunctioning, DTCs for the electronically controlled brake system will be stored. Troubleshoot the electronically controlled brake system first.

    Result:  B

    B 

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ]

    Result:  A

    A 

    See step  2

  2. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
    5. Clear the DTCs. Refer to DTC CHECK / CLEAR [07/2015 - ]
    6. Drive the vehicle at a speed of 50 km/h (31 mph) or more.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

    7. Check for DTCs. Refer to DTC CHECK / CLEAR [07/2015 - ]
      RESULT

      Result Proceed to
      DTC C1A47 is output A
      DTC C1A47 is not output B

    Result:  B

    B 

    USE SIMULATION METHOD TO CHECK (SYMPTOM SIMULATION) 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ]

    Result:  A

    A 

    See step  3

  3. REPLACE DRIVING SUPPORT ECU ASSEMBLY 
    1. Replace the driving support ECU assembly. Refer to REMOVAL [07/2015 - ]

    Result:  NEXT

    NEXT 

    See step  4

  4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
    5. Clear the DTCs. Refer to DTC CHECK / CLEAR [07/2015 - ]
    6. Drive the vehicle at a speed of 50 km/h (31 mph) or more.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

    7. Check for DTCs. Refer to DTC CHECK / CLEAR [07/2015 - ]
      RESULT

      Result Proceed to
      DTC C1A47 is output A
      DTC C1A47 is not output B

    Result:  A

    A 

    REPLACE STEERING SENSOR 

    Refer to COMPONENTS [07/2015 - 08/2016] Refer to COMPONENTS [08/2016 - ]

    Result:  B

    B 

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) 

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