V-MAC Co-Pilot Operator's Manual 9 SYSTEM COMPONENTS Vehicle Electronic Control Unit (VECU) The Vehicle Electronic Control Unit (VECU) is mounted underneath panel D as shown in . (CHU/CXU/GU model shown.) The Vehicle Electronic Control Unit (VECU) is an electronic control module which provides a wide variety of functions including: Cruise Control Diagnostic Trouble Code (DTC) Logging Differential Locking Idle Shutdown Maintenance Information Road Speed Limiting Speed Control Theft Deterrence C0035358 VECU Location