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How To Proceed With Troubleshooting [09/2014 - 11/2017]: Procedure

WARNING: This page is about a different car, the 2017 Lexus RC F, 2016 Lexus RC F, and 2015 Lexus RC F. However, it is still accessible from the selected car via links, so may be relevant.
  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  2

  2. INSPECT BATTERY VOLTAGE 
    1. Measure the battery voltage.

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, replace or recharge the battery before proceeding to the next step.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. CHECK CAN COMMUNICATION SYSTEM* 
    1. Use the Techstream to check if the CAN communication system is functioning normally.

      Result

      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017] 

    Result: 

    See step  4

  4. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)* 
    1. Check for DTCs and note any codes that are output.

      Refer to DTC CHECK / CLEAR [09/2014 - 11/2017] 

      Chassis > Lane Departure Alert > Trouble Codes 

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - 11/2017] 

      Chassis > Lane Departure Alert > Clear DTCs 

    3. Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - 11/2017] 

      Chassis > Lane Departure Alert > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 11/2017]  

    Result: 

    See step  5

  5. PROBLEM SYMPTOMS TABLE 

    HINT: 

    Refer to Problem Symptoms Table.

    Refer to PROBLEM SYMPTOMS TABLE [09/2014 - 11/2017] 

    Result

    Result Proceed to
    Fault is not listed in Problem Symptoms Table A
    Fault is listed in Problem Symptoms Table B

    Result: 

    See step  7

    Result: 

    See step  6

  6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Terminals of ECU

      Refer to TERMINALS OF ECU [09/2014 - 11/2017] 

    2. Data List / Active Test

      Refer to DATA LIST / ACTIVE TEST [09/2014 - 11/2017] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  7

  7. ADJUST, REPAIR OR REPLACE 
    NOTE:

    When the lane departure warning camera is replaced with a new one, adjustment of the lane departure warning camera beam axis must be performed.

    Refer to ADJUSTMENT [09/2014 - 11/2017]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  8

  8. CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END