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Home >> Toyota >> 2021 >> C-HR Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Lane Departure Alert System - Diagnostic Codes & Circuit Tests) >> LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) >> Indicator Circuit [02/2017 - 08/2020] >> Procedure

Indicator Circuit [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. READ VALUE USING TECHSTREAM (CAN BUS CHECK) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: System Select / CAN Bus Check.

      CAN Bus Check 

      Result

      Result Proceed to
      All of the ECUs and sensors that are currently connected to the CAN communication system are displayed. A
      None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed. B

    Result: 

    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: 

    See step  2

  2. CHECK DTC (HEALTH CHECK) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: System Select / Health Check.
    5. Check DTCs.

      Result

      Result Proceed to
      No DTCs are output. A
      DTCs are output. B

    Result: 

    GO TO  DIAGNOSTIC TROUBLE CODE CHART [02/2017 - 08/2020] 

    Result: 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM (METER DISPLAY 1) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    5. According to the display on the Techstream, perform the Active Test.

      Body Electrical > Combination Meter > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Meter Display 1 Multi-information display OFF, 6 to 0 or All -

      Body Electrical > Combination Meter > Active Test 

      Tester Display
      Meter Display 1

      Result

      Result Proceed to
      The multi-information display in the combination meter assembly turns on or off according to the operation of the Active Test. A
      The multi-information display in the combination meter assembly does not turn on or off according to the operation of the Active Test. B

    Result: 

    GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - ] 

    Result: 

    See step  4

  4. 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 Normal Condition Diagnostic Note
      LDA Control Control status of lane departure alert system (w/ Steering Control) Prohibit: Control prohibited
      Permit: Control permitted
      -

      Chassis > LKA/LDA > Data List 

      Tester Display
      LDA Control

      Result

      Result Proceed to
      The lane departure alert indicator illuminates and turns on according to the operation of the lane departure alert main switch A
      The lane departure alert indicator does not illuminate but the Data List item LDA Control changes according to the operation of the lane departure alert main switch B
      The lane departure alert indicator does not illuminate and the Data List item LDA Control does not change according to the operation of the lane departure alert main switch C

    Result: 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [02/2017 - 09/2019]  , or refer to  PROBLEM SYMPTOMS TABLE [09/2019 - 08/2020] 

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

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