Warning System - Mercury 150 EFI Service Manual

WIRING DIAGRAMS
EXITING TROLL CONTROL
There are three ways to turn off the troll control:
Press the
Move the throttle to a different speed.
Shift outboard into neutral.

Warning System

The SmartCraft warning system incorporates the display screens (a) the warning horn
and the Guardian Protection system. The warning horn is located inside the remote con-
trol or is part of the ignition key switch wiring harness.
Alarms Warnings – When a problem is detected, the warning horn sounds and the
name of the offending alarm appears on the display.
If problem can cause immediate engine damage – the horn will sound continuous-
ly and the Engine Guardian System (b) will respond to the problem by limiting en-
gine power. Immediately reduce throttle speed to idle and refer to the warning
messages on the following pages that will tells you what to do about it.
If problem will not cause immediate engine damage – The horn will sound but not
continuous.
The alarm message will stay displayed until the mode button is pressed. If there
are multiple alarms, these will cycle on the display at five second intervals.
If the mode button is pressed to a different screen, the flashing alarm signal "AL"
(c) will appear in the upper right corner to indicate there still a problem.
Engine Guardian System – Monitors the critical sensors on the engine for any
early indications of problems. The system will respond to a problem by reducing
engine power in order to maintain a safe operating condition. The display screen
will show the percent of power loss.
Page 2D-56
MODE
button when in the troll display screen.
a
b
c
90-883728 JULY 2001