Nonconfigured Alarm–DTS Only
If the helm has not been properly configured using the G3 service tool, the audio warning system will sound for five one‑second
intervals.
a - Horn (on or off)
b - Time (in seconds)
Testing the Audio Warning System
1. Turn the key switch to the on position without cranking the engine.
2. Listen for the audio alarm. The alarm will sound if the system is functioning correctly.
Guardian Strategy
The Mercury Engine Guardian system reduces the potential for engine damage by restricting engine power when the control
module detects a potential problem. Below are some examples of what Engine Guardian monitors:
• Oil pressure
• Engine coolant temperature
• Low coolant level
• Seawater pressure sensor
• ECM malfunction
• Crankshaft speed sensor
• Camshaft sensor
• Boost pressure
• Fuel pressure
• Air temperature
• Oil temperature
• Fuel temperature
• Exhaust gas temperature
IMPORTANT: Engine Guardian can reduce power anywhere from 100% to idle, depending on the severity of the problem. If
forced to idle, boat speed might not respond to throttle operation.
The control module stores the fault for diagnostics. For example, if the water inlet becomes partially blocked, Engine Guardian
reduces the available power level of the engine to help prevent damage from decreased water flow to the engine. If the debris
passes through, and full water flow is restored, Engine Guardian restores engine power to normal.
ON ON
OFF
ON
OFF
ON
OFF
ON
OFF
1
1
1
1
1
1
1
1
1
OFF
53402
Section 2 - Getting to Know Your Power Package
90-8M0117076 eng FEBRUARY 2018 Page 25
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