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Home >> Toyota >> 2004 >> Sequoia Limited, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Diagnostics >> Circuit Inspection >> DTC P0505: Idle Air Control System >> Inspection Procedure

Inspection Procedure

NOTE:
  • When the throttle position is slightly opened (the accelerator pedal is slightly depressed) because a floor carpet is overlapped on the accelerator pedal, or if the accelerator pedal is not fully released, etc., DTC P0505 will possibly be detected.
  • Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, as well as other data from the time when a malfunction occurred.
  1. Are there any other codes (besides P0505) being output? 

    PREPARATION: 

    1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
    2. Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.
    3. When using hand-held tester, enter the following menu: DIAGNOSIS / ENHANCED OBD II / DTC INFO/CURRENT CODES.

    CHECK: 

    Read the DTC using the hand-held tester or the OBD II scan tool.

    RESULT: 

    DTC OUT PUT

    Display (DTC Output) Proceed to
    P0505 A
    "P0505" and other DTCs B
    NOTE: If any other codes besides P0505 are output, perform the troubleshooting for those DTCs first.
    1. B: Go to relevant DTC chart (See  DIAGNOSTIC TROUBLE CODE CHART  ) 
    2. A: Go to next step. 
  2. Check connection of PCV piping. 
    1. NG: Repair or replace PCV piping. 
    2. OK: Go to next step. 
  3. Check air induction system (See  PRECAUTION  ). 

    CHECK: 

    Check for vacuum leaks in air induction system.

    1. NG: Repair or replace air induction system. 
    2. OK: Check electric throttle control system (See  THROTTLE BODY  ).