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Home >> Lexus >> 2006 >> IS 250 AWD >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Control System (4GR-FSE) - SFI System Diagnostic And Troubleshooting Introduction, Parts Location, System Diagram, Terminals Of ECM, Diagnostic Trouble Code Chart >> SFI System >> How To Proceed With Troubleshooting

How To Proceed With Troubleshooting

HINT:

*: Use the intelligent tester.

  1. VEHICLE BROUGHT TO WORKSHOP 
  2. CUSTOMER PROBLEM ANALYSIS 
  3. CONNECT INTELLIGENT TESTER TO THE DLC3* 

    HINT:

    If the display indicates a communication fault in the tester, inspect the DLC3.

  4. CHECK DTC AND FREEZE FRAME DATA* 

    HINT:

    Record or print DTCs and freeze frame data, if necessary.

  5. CLEAR DTC AND FREEZE FRAME DATA* 
  6. CONDUCT VISUAL INSPECTION 
  7. SET CHECK MODE DIAGNOSIS* 
  8. CONFIRM PROBLEM SYMPTOMS 

    HINT:

    If the engine does not start, perform steps 10 and 12 first.

    Result 

    RESULT CHART

    Result Proceed to
    Malfunction does not occur A
    Malfunction occurs B

    B : Go to step  10

    A : Go To Next Step 

  9. SIMULATE SYMPTOMS 
  10. CHECK DTC* 

    Result 

    RESULT CHART

    Result Proceed to
    Malfunction code A
    No code B

    B : Go to step  12

    A : Go To Next Step 

  11. REFER TO DTC CHART 
    1. Go to step  14
  12. CONDUCT BASIC INSPECTION 

    Result 

    RESULT CHART

    Result Proceed to
    Malfunctioning parts not confirmed A
    Malfunctioning parts confirmed B

    B : Go to step  17

    A : Go To Next Step 

  13. REFER TO  PROBLEM SYMPTOMS TABLE  

    Result 

    RESULT CHART

    Result Proceed to
    Malfunctioning circuit confirmed A
    RESULT CHART

    Result Proceed to
    Malfunctioning parts confirmed B

    B : Go to step  17

    A : Go To Next Step 

  14. CHECK ECM POWER SOURCE CIRCUIT 
  15. CONDUCT CIRCUIT INSPECTION 

    Result 

    RESULT CHART

    Result Proceed to
    Malfunction not confirmed A
    Malfunction confirmed B

    B : Go to step  18

    A : Go To Next Step 

  16. CHECK FOR INTERMITTENT PROBLEMS 

    Go to step  18

  17. CONDUCT PARTS INSPECTION 
  18. IDENTIFY PROBLEM 
  19. ADJUST AND/OR REPAIR 

    NEXT 

  20. CONDUCT CONFIRMATION TEST 

    END