2007 Lexus RX 350 FWDFACTORY 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 to 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 an intelligent tester. An intelligent 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 an intelligent tester) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. Turn the tester ON.
    4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
    5. Check for the DTC(s) and freeze frame data, and then write them down.
    6. Check the details of the DTC(s) (See DIAGNOSTIC TROUBLE CODE CHART  ).
  2. CLEAR DTC (Using the intelligent tester) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch to the ON position.
    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 an intelligent 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.
        Fig 1: Connecting Intelligent Tester To DLC3
        G05267987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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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