Check Vesselview First; Diagnosing Efi Problems; Diagnosing Dts Problems; Engine Guardian System - MerCruiser Axius 350 MAG User Manual

Section 7 - Troubleshooting

Check VesselView First

Your VesselView display is the primary information source for the various functions of your
boat. Consult the VesselView display if you suspect something is wrong. VesselView
displays faults and other information that can be helpful in determining the current status
of various systems that could be causing your concern and the solution to the problem.

Diagnosing EFI Problems

Your authorized Mercury MerCruiser dealer has the proper service tools for diagnosing
problems on Electronic Fuel Injection (EFI) Systems. The Electronic Control Module (ECM)
on these engines has the ability to detect some problems with the system when they occur,
and store a Trouble Code in the ECM's memory. This code can then be read later by a
service technician using a special diagnostic tool.

Diagnosing DTS Problems

Your authorized Mercury MerCruiser dealer has the proper service tools for diagnosing
problems on Digital Throttle and Shift (DTS) Systems. The Electronic Control Module
(ECM)/Propulsion Control Module (PCM) on these engines has the ability to detect some
problems with the system when they occur, and store a Trouble Code in the ECM/PCM's
memory. This code can then be read later by a service technician using a special diagnostic
tool.

Engine Guardian System

The Engine Guardian System monitors the critical sensors on the engine for any early
indications of problems. The system will respond to a problem by emitting a continuous
beep and/or reducing engine power in order to provide engine protection.
If Guardian System has been activated, reduce throttle speed. The horn will turn off when
throttle speed is within the allowable limit. Consult an authorized Mercury MerCruiser
dealer for assistance.

Troubleshooting Charts

Starter Motor Will Not Crank Engine, Or Cranks Slow

Battery switch turned off.
Remote control not in neutral position.
Open circuit breaker or blown fuse.
Loose or dirty electrical connections or damaged
wiring.
Bad battery or low battery voltage.
Lanyard stop switch activated.
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Possible Cause Remedy
Turn the switch on.
Position the control lever in neutral.
Check and reset the circuit breaker or replace fuse.
Check all electrical connections and wires (especially
battery cables). Clean and tighten all faulty
connections.
Test the battery and charge if necessary; replace if
bad.
Check the lanyard stop switch.
90-899883234 JANUARY 2008