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Home >> Lexus >> 2008 >> GX 470 >> 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:

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

      HINT:

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

      Result 

      RESULT REFERENCE

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

      HINT:

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

    B: GO TO RELEVANT DTC CHART 

    A: Go to Next Step 

  2. CHECK CONNECTION OF PCV HOSE 

    OK: PCV hose is connected correctly and is not damaged. 

    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 from air induction system. 

    NG: REPAIR OR REPLACE AIR INDUCTION SYSTEM 

    OK: Go to Next Step 

  4. CHECK THROTTLE WITH MOTOR BODY ASSEMBLY 
    1. Check the throttle valve condition.

    NG: REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY 

    OK: REPLACE ECM