5 Multiplexed Electrical System Service Manual CECU Details CECU Connector Identification The heart of the multiplexed instrumentation system is the CECU. See Control Unit Locations on page 3-2 for illustrations depicting the physical position of the control unit. There are 5 electrical connectors that plug into the CECU. Connector A - 9 pins Connector B - 24 pins The CECU receives data related to controlling the various devices of the electrical system. It then makes decisions based on that input and sends information to subsystem system control modules (nodes) about what that node should do with the components it controls.
Connector C - 52 pins Connector D - 40 pins Connector E - 9 pins For an illustration of the side view of a CECU showing where the harness connectors attach into the control unit, see CECU Figure. This figure identifies connector position on the control unit as well as individual connector pin locations. CECU For connector face views at the harness connectors that plug into the CECU, see CECU Connector Face Views Figure. These connectors all branch from the instrument panel harness that routes behind the dash. CECU Connector Face Views 5 - 4 PM819023/KM815057 (08/14/2012)