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Home >> Lexus >> 2021 >> RC F Base >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Lane Departure Alert System (W/ Steering Control) - Diagnostics - Introduction >> LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) >> Diagnosis System [11/2017 - 01/2023] >> Diagnosis System [11/2017 - 01/2023]

Diagnosis System [11/2017 - 01/2023]

  1. CHECK DLC3 
    1. Check the DLC3.

      Refer to GENERAL INFORMATION [09/2014 - ]

  2. FUNCTION OF WARNING INDICATOR AND MESSAGE 
    1. If the lane departure alert system (w/ Steering Control) is not functioning properly, the driver is warned by the lane departure alert indicator and a warning message displayed on the multi-information display.
      Master Warning Indicator Warning Message Details DTC Lane Departure Alert Indicator
      Illuminated Lane Departure Alert Malfunction Visit Your Dealer Lane departure alert system (w/ Steering Control) is malfunctioning Stored Illuminates (yellow)
      Not illuminated Front Camera Unavailable
      • Abnormal forward recognition camera voltage
      • Forward recognition camera temperature outside of operational range
      • Other forward recognition camera malfunction
      Not stored Illuminates (yellow)
      Not illuminated Front Camera Unavailable Remove Debris On Windshield Forward recognition camera view is unclear Not stored Illuminates (yellow)
      Illuminated Lane Departure Alert Unavailable Sensor other than forward recognition camera sensor is temporarily disabled Not stored Illuminates (yellow)

      HINT: 

      LANE DEPARTURE ALERT INDICATOR STATUS

      Lane Departure Alert Indicator Condition
      Illuminates (yellow) The LDA system is malfunctioning or temporarily disabled
      Blinks (yellow) Lane departure alert function is operating
      Illuminates (green) Lane departure alert steering control function is operating*
      Illuminates (white) Monitoring for lane departure
      Not illuminated Lane departure alert system (w/ Steering Control) is not operating

      *If the lane departure alert steering control function operates while the lane departure alert function is operating, the lane departure alert indicator blinks (yellow).