SYSTEM DIAGRAM 
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS NEXT 3. CONNECT TECHSTREAM TO DLC3* HINT: If the display indicates a communication malfunction, inspect the DLC3. When any CAN communication system DTCs are output, perform ...
