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Home › Toyota › 2004 › Highlander Limited, AWD › Repair and Diagnosis › Engine Performance › Engine Control System (SFI) - Diagnostics (3MZ-FE) › How To Proceed With Troubleshooting

How To Proceed With Troubleshooting

HINT:

The hand-held tester is used in steps 3, 4, 5, 7 and 10.

  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 

    HINT:

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

    1. Go to next step. 
  4. CHECK PTC AND FREEZE FRAME DATA (See  DTC CHECK/CLEAR  ) 

    HINT:

    Record or print DTC and freeze frame data, if needed.

    1. Go to next step. 
  5. CLEAR PTC AND FREEZE FRAME DATA (See  DTC CHECK/CLEAR  ) 
    1. Go to next step. 
  6. VISUAL INSPECTION 
    1. Go to next step. 
  7. SETTING CHECK (TEST) MODE DIAGNOSIS (See  CHECK MODE PROCEDURE  ) 
    1. Go to next step. 
  8. PROBLEM SYMPTOM CONFIRMATION 

    HINT:

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

    PROBLEM SYMPTOM CONFIRMATION

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

    Malfunction code A
    No code B
    1. B: Go to step   12 . 
    2. A: GO TO NEXT STEP. 
  11. PTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART  ) 
    1. Go to step   14 . 
  12. BASIC INSPECTION (See  BASIC INSPECTION  ) 
    BASIC INSPECTION

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

    Wrong circuit confirmed A
    Wrong parts confirmed B
    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

    Malfunction not confirmed A
    Malfunction confirmed B
    1. B: Go to step   18 . 
    2. A: GO TO NEXT STEP. 
  16. CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS  ) 
    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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