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Home >> Toyota >> 2004 >> Sienna CE >> Repair and Diagnosis >> Engine Performance >> Engine Control System (SFI) - Diagnosis >> How To Proceed With Troubleshooting
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How To Proceed With Troubleshooting

  1. VEHICLE BROUGHT TO WORKSHOP 
    1. Go to next step.
  2. CUSTOMER PROBLEM ANALYSIS (See  CUSTOMER PROBLEM ANALYSIS CHECK  ) 
    1. Go to next step.
  3. CONNECT HAND HELD TESTER TO DLC3 
    NOTE: If the display indicates a communication fault in the tool, inspect DLC3.
    1. Go to next step.
  4. CHECK DTC AND FREEZE FRAME DATA (See  PRE-CHECK  ) 
    NOTE: Record or print DTC and freeze frame data, if needed.
    1. Go to next step.
  5. CLEAR DTC AND FREEZE FRAME DATA (See  PRE-CHECK  ) 
    1. Go to next step.
  6. VISUAL INSPECTION 
    1. Go to next step.
  7. SETTING CHECK (TEST) MODE DIAGNOSIS (See  PRE-CHECK  ) 
    1. Go to next step.
  8. PROBLEM SYMPTOM CONFIRMATION 
    NOTE: If the engine does not start, perform steps  10 and  12 first.
    MALFUNCTION PROBLEM SYMPTOM CONFIRMATION

    A Malfunction does not occur
    B Malfunction occurs
    1. B: GO TO STEP   10 
    2. A: Go to next step. 
  9. SYMPTOM SIMULATION 
    1. Go to next step.
  10. DTC CHECK (See  PRE-CHECK  ) 
    DTC CHECK

    A Malfunction code
    B No code
    1. B: GO TO STEP   12 
    2. A: Go to next step. 
  11. DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART  ) 
    1. GO TO STEP   14 
  12. BASIC INSPECTION (See  PRE-CHECK  ) 
    BASIC INSPECTION

    A Wrong parts not confirmed
    B Wrong parts confirmed
    1. B: GO TO STEP   17 
    2. A: Go to next step. 
  13. PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    PROBLEM SYMPTOM

    A Wrong circuit confirmed
    B Wrong parts confirmed
    1. B: GO TO STEP   17 
    2. A: Go to next step. 
  14. CHECK ECM POWER SOURCE CIRCUIT (See  ECM POWER SOURCE CIRCUIT  ) 
    1. Go to next step.
  15. CIRCUIT INSPECTION 
    CIRCUIT INSPECTION

    A Malfunction not confirmed
    B Malfunction confirmed
    1. B: GO TO STEP   18 
    2. A: Go to next step. 
  16. CHECK FOR INTERMITTENT PROBLEMS (See  PRE-CHECK  ) 
    1. GO: TO STEP   18 
  17. PARTS INSPECTION 
    1. Go to next step.
  18. IDENTIFICATION OF PROBLEM 
    1. Go to next step.
  19. ADJUSTMENT, REPAIR 
    1. Go to next step.
  20. CONFIRMATION TEST 
    1. END 
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