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Home >> Lexus >> 2010 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0351-U0101) & Circuit Tests) >> SFI System >> DTC P0505: Idle Control System Malfunction >> Procedure
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DTC P0505: Idle Control System Malfunction: Procedure

  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0505) 

    Result

    Result Proceed to
    P0505 A
    P0505 and other DTCs B

    B → See step   5 

    A: Go to next step 

  2. CHECK CONNECTION OF PCV HOSE 

    NG → REPAIR OR REPLACE PCV HOSE 

    OK: Go to next step 

  3. CHECK AIR INDUCTION SYSTEM 

    NG → REPAIR OR REPLACE AIR INDUCTION SYSTEM 

    OK: Go to next step 

  4. CHECK THROTTLE VALVE 
    1. Check the throttle valve condition.

    NG → See step   6 

    OK → See step   7 

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