HOW TO PROCEED WITH TROUBLESHOOTING HINT: This is a flowchart for vehicle pull. 
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Toyota Tundra Service Manual > Main Body Ecu: Installation
INSTALLATION CAUTION / NOTICE / HINT NOTICE: The main body ECU (multiplex network body ECU) is not reusable. Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin. PROCEDURE 1. INSTALL MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) NOTICE: Make sure that the connecti ...
