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Home >> Lexus >> 2018 >> NX 300 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Lane Departure Alert System (W/ Steering Control) - Diagnostic Codes & Symptom Tests >> LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) >> DTC C1AAC: Vehicle Information Unmatched; DTC C1AAD: Vehicle Information Initialization Incomplete [10/2014 - 09/2017] >> Procedure
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DTC C1AAC: Vehicle Information Unmatched; DTC C1AAD: Vehicle Information Initialization Incomplete [10/2014 - 09/2017]: Procedure

  1. READ VALUE USING TECHSTREAM (DESTINATION INFORMATION) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / Lane Departure Alert / Data List.
    5. Read the Data List according to the display on the Techstream.

      Chassis > Lane Departure Alert > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Vehicle Information (2WD/4WD) Vehicle information 2WD, 4WD or Unknown 2WD: for 2WD
      4WD: for AWD
      Unknown: Vehicle information not confirmed
      -
      Vehicle Information (Conv/HV) Vehicle information Conv, HV or Unknown Conv: Conventional
      HV: Hybrid vehicle
      Unknown: Vehicle information not confirmed
      -

      Chassis > Lane Departure Alert > Data List 

      Tester Display
      Vehicle Information (2WD/4WD)
      Vehicle Information (Conv/HV)

      Result

      Result Proceed to
      Country specification information for vehicle and lane departure warning camera match A
      Country specification information for vehicle and lane departure warning camera do not match B

    Result: 

    REPLACE ECM. Refer to  REMOVAL [10/2014 - 05/2019] 

    Result: 

    See step  2

  2. CHECK FOR DTCs 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2014 - 09/2017]

      Chassis > Lane Departure Alert > Clear DTCs 

    2. Make sure that the DTC detection conditions are met.

      HINT: 

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

    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2014 - 09/2017]

      Chassis > Lane Departure Alert > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AAC and C1AAD are not output A
      DTC C1AAC or C1AAD is output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017] 

    Result: 

    See step  3

  3. REPLACE LANE DEPARTURE WARNING CAMERA 
    1. Replace the lane departure warning camera.

      Refer to REMOVAL [10/2014 - 09/2017]

    2. Perform the lane departure warning camera adjustment.

      Refer to ADJUSTMENT [10/2014 - 09/2017]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK FOR DTCs 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2014 - 09/2017]

      Chassis > Lane Departure Alert > Clear DTCs 

    2. Make sure that the DTC detection conditions are met.

      HINT: 

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

    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2014 - 09/2017]

      Chassis > Lane Departure Alert > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AAC and C1AAD are not output A
      DTC C1AAC or C1AAD is output B

    Result: 

    END (LANE DEPARTURE WARNING CAMERA WAS DEFECTIVE) 

    Result: 

    REPLACE ECM. Refer to  REMOVAL [10/2014 - 05/2019]