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Home >> Scion >> 2013 >> xD Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes P0420 - P1603) >> SFI System >> DTC P0505: Idle Control System Malfunction >> Procedure

DTC P0505: Idle Control System Malfunction: Procedure

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

      Result Proceed to
      P0505 A
      P0505 and other DTCs B

      HINT: 

      If any DTCs other than P0505 are output, troubleshoot those DTCs first.

    B → See step   6 

    A: Go to next step 

  2. CHECK PCV HOSE CONNECTIONS 
    1. Check the PCV hose connections. Refer to COMPONENTS .

      OK

      PCV valve and hose are connected correctly and are not damaged.

    NG → REPAIR OR REPLACE PCV HOSE 

    OK: Go to next step 

  3. CHECK INTAKE SYSTEM 
    1. Check the intake system for vacuum leak. Refer to ON-VEHICLE INSPECTION - Step 1 .

      OK

      No leak from intake system.

    NG → REPAIR OR REPLACE INTAKE SYSTEM 

    OK: Go to next step 

  4. INSPECT THROTTLE BODY (THROTTLE VALVE) 
    1. Check the throttle valve condition.

      OK

      Throttle valve is not contaminated with foreign objects and moves smoothly.

    NG → See step   7 

    OK: Go to next step 

  5. CONFIRM WHETHER DTC OUTPUT RECURS 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    5. Read the pending DTCs.
      RESULT

      Result Proceed to
      P0505 A
      No DTC output B

    B → END 

    A → See step   8 

  6. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  7. REPAIR OR REPLACE THROTTLE BODY. Refer to  REMOVAL 
  8. REPLACE ECM. Refer to  REMOVAL