2008 Toyota Prius BaseFACTORY OEM SERVICE PROCEDURE

How To Proceed With Troubleshooting

HINT:

  • Use these procedures to troubleshoot the electronically controlled brake system.
  • *: Use the Teachstream.
  1. VEHICLE BROUGHT TO WORKSHOP 
  2. CUSTOMER PROBLEM ANALYSIS 
  3. CHECK DTC AND FREEZE FRAME DATA* 
  4. CLEAR DTC AND FREEZE FRAME DATA* 
  5. PROBLEM SYMPTOM CONFIRMATION 

    Result 

    SYMPTOM CHART

    Result Proceed to
    Symptom does not occur A
    Symptom occur B

    B: Go to STEP  7

    A: Go to Next Step 

  6. SYMPTOM SIMULATION 
  7. CHECK FOR DTC* 

    Result 

    SYMPTOM CHART

    Result Proceed to
    There is no output A
    There is output B

    B: Go to STEP  9

    A: Go to Next Step 

  8. PROBLEM SYMPTOMS TABLE 

    NEXT: CHECK FOR FLUID LEAKAGE AND GO TO STEP  11

  9. SYMPTOM SIMULATION 
  10. DTC CHART 
  11. CIRCUIT INSPECTION* 
  12. IDENTIFICATION OF PROBLEM 
  13. REPAIR OR REPLACE 
  14. CONFIRMATION TEST* 

    NEXT: END 

Factory Service Tools

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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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