This manual pertains to the Multiplexed Electrical System, specifically focusing on the CECU3 (Central Electronic Control Unit) with Chassis Node, for the 2010 model year. This advanced multiplexed electrical architecture was engineered to enhance vehicle efficiency, functionality, and diagnostic capabilities across a diverse range of trucks. This system leverages CAN communication protocols and J1939 standards to integrate various vehicle functions, from lighting and HVAC controls to engine and transmission management, and advanced driver-assistance systems.

This comprehensive service repair manual provides essential information for the diagnosis, maintenance, and repair of the Multiplexed Electrical System. It covers key areas such as electrical system troubleshooting, component diagnostics, detailed wiring diagrams, and programming procedures for the CECU3 and chassis nodes. The manual is designed to assist professional automotive technicians, fleet maintenance personnel, and dealerships by offering in-depth technical data, systematic diagnostic approaches, and step-by-step repair instructions, ensuring the accurate and efficient upkeep of these complex electronic systems.