2005 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE

DTC Check/Clear

NOTE: All the stored DTCs and freeze frame data are erased if: 1) the ECM is changed from normal mode to check mode or vice versa; or 2) the ignition switch is turned from on (IG) to on (ACC) or off while in check mode.
Before changing modes, always check and make a note of any DTCs and freeze frame data.

HINT:

  • DTCs which are stored in the ECM can be displayed on a hand-held tester. A hand-held tester can display current and pending DTCs.
  • Some DTCs are not set if the ECM does not detect the same malfunction again during the second consecutive driving cycle. However, such malfunctions, detected on only one occasion, are stored as pending DTCs.
  1. CHECK DTC (Using a hand-held tester) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch on (IG).
    3. Turn the tester ON.
    4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
    5. Check the DTC(s) and freeze frame data, and then write them down.
    6. See DIAGNOSTIC TROUBLE CODE CHART  to check the details of the DTC(s).
      Fig 1: Connecting Hand-Held Tester To DLC3
      G02975941Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CLEAR DTC (Using the hand-held tester) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch on (IG).
    3. Turn the tester ON.
    4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES.
    5. Press the YES button.
  3. CLEAR DTC (Without using a hand-held tester) 
    1. Perform either one of the following operations:
      1. Disconnect the negative battery cable for more than 1 minute.
      2. Remove the EFI No. 1 and ETCS fuses from the Relay Block (R/B) located inside the engine compartment for more than 1 minute.
Factory Service Tools

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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.

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