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Home >> Toyota >> 2003 >> Highlander Limited, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self Diagnostics - V6 >> Self-Diagnostic System >> Retrieving Diagnostic Trouble Codes >> NORMAL Mode Code Retrieval
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NORMAL Mode Code Retrieval

NOTE:
  • If there is no DTC in the normal mode, check the 1st trip DTC using the continuous test results function (mode 7 for SAE J1979) on the OBD II scan tool or the hand-held tester.

  • Hand-held tester only

    When the diagnosis system is switched from the normal mode to the check mode, all the DTCs and freeze frame data recorded in the normal mode will be erased. So before switching modes, always check the DTCs and freeze frame data, and note them down.
  1. Prepare and connect the OBD II scan tool (complying with SAE J1978) or hand-held tester to the DLC3. See Figure. Turn ignition switch ON with engine off. Turn the OBD II scan tool or hand-held tester switch ON.
  2. If hand-held tester or scan tool does not display UNABLE TO CONNECT TO VEHICLE, go to next step. If hand-held tester or scan tool displays UNABLE TO CONNECT TO VEHICLE, check DLC3. See DATA LINK CONNECTOR NO. 3 INSPECTION  under SCAN TOOL PROBLEMS.
  3. Record any DTCs and freeze frame data displayed for system diagnosis. If any DTCs are present, perform appropriate DTC test under DIAGNOSTIC TESTS . If driveability problem exist and no DTCs are present, go to TROUBLE SHOOTING - NO CODES article for diagnosis by symptom. For more information on freeze frame data, see FREEZE FRAME DATA . For information on two-trip detection logic codes, see TWO-TRIP DETECTION LOGIC .
    NOTE:

    When simulating symptom with an OBD II scan tool (excluding hand-held tester) to check the DTCs, use the normal mode. For code on the DTC chart subject to 2 trip detection logic, perform either of the following actions:

    • Turning the ignition switch OFF after the symptom is simulated once. Then repeat the simulation process again. When the problem has been simulated twice, the MIL lights up and the DTCs are recorded the ECM.
    • Check the 1st trip DTC using mode 7 (continuous test results) for SAE J1979.

  4. After repairs for DTC have been completed, DTC must be cleared from ECM. See CLEARING DIAGNOSTIC TROUBLE CODES . Road test vehicle to ensure all symptoms and/or complaints have been repaired.
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