2005 Toyota PriusFACTORY OEM SERVICE PROCEDURE

How To Proceed With Troubleshooting

The hand-held tester can be used at step 3, 4, 5, 7 and 10.

  1. VEHICLE BROUGHT TO WORKSHOP 
    1. NEXT: GO TO NEXT STEP. 
  2. CUSTOMER PROBLEM ANALYSIS (See  CUSTOMER PROBLEM ANALYSIS CHECK   ) 
    1. NEXT: GO TO NEXT STEP. 
  3. CONNECT HAND-HELD TESTER TO DLC3 

    HINT:

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

    1. NEXT: GO TO NEXT STEP. 
  4. CHECK DTC AND FREEZE FRAME DATA (See  DTC CHECK/CLEAR   ) 

    HINT:

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

    1. NEXT: GO TO NEXT STEP. 
  5. CLEAR DTC AND FREEZE FRAME DATA (See  DTC CHECK/CLEAR   ) 
    1. NEXT: GO TO NEXT STEP. 
  6. VISUAL INSPECTION 
    1. NEXT: GO TO NEXT STEP. 
  7. SETTING CHECK MODE DIAGNOSIS (See  CHECK MODE PROCEDURE   ) 
    1. NEXT: 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. NEXT: GO TO NEXT STEP. 
  10. DTC 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. DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART   ) 
    1. NEXT: GO TO NEXT STEP. 

    GO TO STEP   14  .

  12. BASIC INSPECTION (See  BASIC INSPECTION   ) 
    DIAGNOSTIC TROUBLE CODE CHART

    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 CHART

    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   ) 

    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. NEXT: GO TO NEXT STEP. 

    GO TO STEP   18 

  17. PARTS INSPECTION 
    1. NEXT: GO TO NEXT STEP. 
  18. IDENTIFICATION OF PROBLEM 
    1. NEXT: GO TO NEXT STEP. 
  19. ADJUSTMENT AND/OR REPAIR 
    1. NEXT: GO TO NEXT STEP. 
  20. CONFIRMATION TEST 
    1. NEXT: GO TO NEXT STEP. 

    END 

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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