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Self-Diagnostic System: Summary

WARNING: This page is about a different car, the 2002 Toyota Avalon and 2001 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

If no hard DTCs are present, and either driveability symptoms or intermittent DTCs exist, attempt diagnosis by symptom, or by testing individual components related to system fault. See TROUBLE SHOOTING and/or COMPONENT TESTS. If no problem is found, verify proper electronic control system circuit operation. See PIN VOLTAGE TESTS .

NOTE: Always clear the DTCs once repairs are completed. See CLEARING DIAGNOSTIC TROUBLE CODES . Road test the vehicle and retrieve the DTCs to determine if complaint or DTC is repaired.
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