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Home >> Toyota >> 2008 >> Prius Base >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> SFI System >> DTC P0505 Idle Control System Malfunction >> Inspection Procedure
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Inspection Procedure

HINT:

Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0505) 
    1. Connect Techstream to the DLC3.
    2. Turn the power switch ON (IG).
    3. Turn Techstream ON.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
    5. Read the DTCs.

      Result 

      RESULT CHART

      Display (DTC output) Proceed to
      P0505 A
      P0505 and other DTCs B

      HINT:

      If any other codes besides P0505 are output, perform troubleshooting for those DTCs first.

    B:  GO TO DTC CHART 

    A: Go to next step 

  2. CHECK CONNECTION OF PCV HOSE 

    OK: 

    PCV hose is connected correctly and has no damage. 

    NG: REPAIR OR REPLACE PCV HOSE 

    OK: Go to next step 

  3. CHECK AIR INDUCTION SYSTEM 
    1. Check for vacuum leaks in the air induction system.

      OK: 

      No leakage in the air induction system. 

    NG: REPAIR OR REPLACE AIR INDUCTION SYSTEM 

    OK: CHECK ELECTRIC THROTTLE CONTROL SYSTEM