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Home >> Toyota >> 2018 >> Corolla SE, Standard Trans >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Lane Departure Alert System (W/ Steering Control) - Diagnostic Codes & Circuit Tests (Model Code: ZRE172) >> LANE DEPARTURE ALERT SYSTEM (W/ Steering Control) >> DTC C1AA3: Vehicle Speed Sensor Circuit [08/2016 - ] >> Procedure
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DTC C1AA3: Vehicle Speed Sensor Circuit [08/2016 - ]: Procedure

  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) 

    HINT: 

    If DTC C1AA3 is stored, the vehicle stability control system may be malfunctioning. Check for DTCs related to the vehicle stability control system first.

    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2015 - ]

      Chassis > ABS/VSC/TRAC > Trouble Codes 

      Result

      Result Proceed to
      Vehicle stability control system DTCs are not output A
      Vehicle stability control system DTCs are output B

    Result:  2

    GO TO VEHICLE STABILITY CONTROL SYSTEM:  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] 

    Result:  1

    See step  2

  2. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Chassis > LKA/LDA > Clear DTCs 

    2. Perform the following procedure.

      HINT: 

      If the following procedure is not performed, the previously output DTC cannot be detected.

      1. Turn the ignition switch to ON and wait 7 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AA3 is not output A
      DTC C1AA3 is output B

    Result:  1

    USE SIMULATION METHOD TO CHECK:  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 08/2017]  , HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] 

    Result:  2

    See step  3

  3. REPLACE FORWARD RECOGNITION CAMERA 
    1. Replace the forward recognition camera.

      Refer to REMOVAL [08/2016 - ]

    2. Perform forward recognition camera adjustment.

      Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [08/2016 - ]

      Result

      Proceed to
      NEXT

    Result:  2

    NEXT 

    See step  4

  4. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Chassis > LKA/LDA > Clear DTCs 

    2. Perform the following procedure.

      HINT: 

      If the following procedure is not performed, the previously output DTC cannot be detected.

      1. Turn the ignition switch to ON and wait 7 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AA3 is not output A
      DTC C1AA3 is output B

    Result:  1

    END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) 

    Result:  2

    REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY):  COMPONENTS [08/2015 - 08/2017]  , COMPONENTS [08/2017 - ]