Name of Component
Function
Electrical Panel (E-Box)
The electrical panel houses the engine electrical system fuses, relays, and ECU.
The ECU monitors data from the various sensors and controls such functions as
low-pressure fuel pump operation, fuel injection pressure, fuel injection system
volume, and the timing and volume of fuel injected by the Bosch electronic fuel
injectors. Throttle control is fly-by-wire meaning it is controlled by electric signals
from the helm. The throttle control is either analog or digital depending on the
level of control options installed. The ECU also uses sensor inputs to monitor
engine condition and will set a trouble code if a system or sensor indicates a
problem. In most cases, a Check Engine light will be displayed. The engine may
or may not run normally depending on the fault. Not all inputs are monitored by
the ECU. Low oil pressure and water in fuel are two examples. Either of these
conditions will result in a warning indicator and possible audible alarm. Low oil
pressure will also be indicated by the oil gauge at the helm (not available with
Classic Controls).
Electrical Panel (E-Box)
Circuit Breaker
The electrical panel circuit breaker is installed in the positive (+) cable of the
electrical panel power lead, and provides overload protection for the electrical
panel. The electrical panel power leads must be connected directly to the battery,
and must have a breaker installed in the B+ (red) lead.
PRODUCT OVERVIEW
BY Series Operation Manual
17
© 2008 Yanmar Marine International
