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DTC C1AAD: Vehicle Information Initialization Incomplete [02/2017 - 08/2020]: Procedure

WARNING: This page is about a different car, the 2020 Toyota C-HR, 2019 Toyota C-HR, and 2018 Toyota C-HR. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (CAN COMMUNICATION DTC OUTPUT) 

    HINT: 

    The forward recognition camera communicates with the ECM via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.

    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
    5. Check for DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC U0100 is not output A
      DTC U0100 is output B

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - 05/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - 09/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020] 

    Result: 

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / LKA/LDA / Data List.
    5. Read the Data List according to the display on the Techstream.

      Chassis > LKA/LDA > Data List 

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

      Chassis > LKA/LDA > Data List 

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

      HINT: 

      • If "Unknown" is displayed, the ECM cannot send vehicle information or the forward recognition camera cannot store the vehicle information. Check for DTCs, replace the ECM if necessary and recheck for DTCs. If the DTC is output again, replace the forward recognition camera.
      • If "Unknown" is not displayed, the DTC is stored even though the vehicle information is stored in the forward recognition camera. Replace the forward recognition camera.

      Result

      Result Proceed to
      "Unknown" is displayed A
      "Unknown" is not displayed B

    Result: 

    B 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    A 

    See step  3

  3. CHECK DTC OUTPUT 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
    5. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

      Chassis > LKA/LDA > Clear DTCs 

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

      HINT: 

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

      1. Turn the ignition switch to ON and wait 2 seconds or more.
    7. Check for DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AAD is output A
      DTC C1AAD is not output B

    Result: 

    B 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - 10/2017]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 05/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - 09/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020] 

    Result: 

    A 

    See step  4

  4. REPLACE ECM 
    1. Replace the ECM.

      Refer to REMOVAL [02/2017 - 10/2017] , or refer to REMOVAL [10/2017 - 08/2020]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK DTC OUTPUT 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
    5. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

      Chassis > LKA/LDA > Clear DTCs 

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

      HINT: 

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

      1. Turn the ignition switch to ON and wait 2 seconds or more.
    7. Check for DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AAD is output A
      DTC C1AAD is not output B

    Result: 

    A 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    B 

    END (ECM WAS DEFECTIVE) 

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