LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2004 >> Avalon XLS >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Introduction) >> How To Troubleshoot Ecu Controlled Systems >> How To Proceed With Troubleshooting >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

How To Proceed With Troubleshooting: Notes

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

Carry out troubleshooting in accordance with the troubleshooting flowchart. Here, only the basic procedure is shown. Details are provided in Diagnostics articles, showing the most effective methods for each circuit. Confirm the troubleshooting procedures first for the relevant circuit before beginning troubleshooting of that circuit.

Fig 1: Troubleshooting Flowchart For ECU Controlled Systems
G00397477Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002