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Home >> Lexus >> 2015 >> IS 250 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (4GR-FSE) - Diagnostic Codes (5 Of 5) & Circuit Tests >> SFI System >> MIL Circuit [04/2013 - 08/2015] >> Procedure

MIL Circuit [04/2013 - 08/2015]: Procedure

  1. CHECK THAT MIL IS ILLUMINATED 
    1. Perform troubleshooting in accordance with the table below.

      Result

      Result Condition Proceed to
      ON→OFF Engine switch on (IG) → engine is started A
      MIL does not illuminate Engine switch on (IG) → engine is started B
      MIL remains ON Engine switch on (IG) → engine is started C

    Result: 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [04/2013 - 08/2015] 

    Result: 

    GO TO VC OUTPUT CIRCUIT. Refer to  VC Output Circuit [04/2013 - 08/2015]  

    Result: 

    See step  2

  2. CHECK WHETHER DTC OUTPUT RECURS 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine > Trouble Codes 

    5. Check if any DTCs have been detected. Note down any DTCs.

      Result

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

      HINT: 

      Check for detected DTCs output from other ECUs which relate to the MIL.

    Result: 

    REPAIR CIRCUIT INDICATED BY OUTPUT 

    Result: 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Active Test / Check Engine Indicator

      Body Electrical > Combination Meter > Active Test 

      Tester Display
      Check Engine Indicator
    5. Check the status of the MIL while performing the Active Test.

      Result

      Result Proceed to
      Changes A
      Does not change B

    Result: 

    REPLACE ECM. Refer to  REMOVAL [04/2013 - 08/2015] 

    Result: 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2013 - 10/2016]