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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 726 (ENGINE CONTROL SYSTEM - DIAGNOSIS)DTC P0505: IDLE AIR CONTROL SYSTEMINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 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, and other data from the time the malfunction occurred.

  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0505) 
    1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
    2. Turn the ignition switch to ON and turn the hand-held tester or the OBD II scan tool ON.
    3. Select the item: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
    4. Read DTCs.

      Result: 

      Fig 1: DTC Result Table
      G01438366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    B: GO TO RELEVANT DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART  ) 

    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 
    1. Check for vacuum leaks in the air induction system.

    NG: REPAIR OR REPLACE AIR INDUCTION SYSTEM 

    OK: GO TO NEXT STEP. 

    CHECK ELECTRIC THROTTLE CONTROL SYSTEM (See  SFI SYSTEM (3MZ-FE)  ) 

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.