Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2001 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE
NORMAL Mode Code Retrieval
- Connect scan tool to Data Link Connector (DLC) No. 3. See Figure. Turn ignition on with engine off. Turn scan tool on. Using scan tool manufacturer's instructions, check for DTCs and FREEZE FRAME data.
- If scan tool does not display UNABLE TO CONNECT TO VEHICLE, go to next step. If scan tool displays UNABLE TO CONNECT TO VEHICLE, check DLC No. 3. See DATA LINK CONNECTOR NO. 3 INSPECTION under SCAN TOOL PROBLEMS.
- 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.
- If any DTCs are present, perform appropriate DTC test under DIAGNOSTIC TESTS . For DTC descriptions, see DIAGNOSTIC TROUBLE CODE DEFINITIONS table under DIAGNOSTIC TROUBLE CODE DEFINITIONS. For more information on freeze-frame data, see FREEZE FRAME DATA . For information on two-trip detection logic codes, see TWO-TRIP DETECTION LOGIC .
- After repairs have been completed, clear DTCs from ECM. See CLEARING DIAGNOSTIC TROUBLE CODES . Road test vehicle to ensure all symptoms and/or complaints have been repaired.
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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