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Home >> Lexus >> 2003 >> GS 430 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Self-Diagnostic System >> Retrieving Diagnostic Trouble Codes >> NORMAL Mode Code Retrieval
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NORMAL Mode Code Retrieval

  1. Connect scan tool to Data Link Connector No. 3 (DLC3). See Figure. DLC3 is located under left side of instrument panel. Turn ignition on with engine off. Turn scan tool on. Using scan tool manufacturer's instructions, check for DTCs and freeze-frame data.
  2. If scan tool displays UNABLE TO CONNECT TO VEHICLE, DLC3 must be checked. See DLC3 INSPECTION  under SCAN TOOL PROBLEMS. If scan tool does not display UNABLE TO CONNECT TO VEHICLE, go to next step.
  3. Record any DTCs and freeze-frame data displayed for system diagnosis. If driveability problem exists and no DTCs are present, go to TROUBLE SHOOTING - NO CODES article for diagnosis by symptom.
  4. If any DTCs are present, perform appropriate diagnostic test in DIAGNOSTIC TESTS . See DIAGNOSTIC TROUBLE CODE (DTC) DEFINITIONS . For more information on freeze-frame data, See FREEZE-FRAME DATA  under INTRODUCTION. For information on 2-trip detection logic codes, See TWO-TRIP DETECTION LOGIC  under DETECTION LOGIC
  5. After repairs for DTC have been completed, DTCs must be cleared from ECM memory. See CLEARING DIAGNOSTIC TROUBLE CODES .
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