Malfunctions Group 30: Electrical system
28
Fault tracing
Fault conditions 1
The tachometer shows engine hours but not engine
revolution due to that no flywheel speed signal is
available.
Possible reason
• Fault in the flywheel sensor cable between the
MDI and the sensor.
• Incorrectly mounted sensor (incorrect distance to
flywheel, or loose sensor).
• Electrical interference on engine speed signal.
• Faulty flywheel sensor.
• Damaged flywheel.
Suitable action
1. Check the cables and the connectors between the
engine connector at the MDI and the flywheel sen-
sor.
2. Check that the flywheel sensor is correctly installed
and that no swarf has collected on the sensor.
3. Check the funtion of the flywheel sensor.
Fault conditions 2
The tachometer and/or the display shows neither en-
gine hours nor engine revolution and easy link instru-
ments does not work.
If fault in multilink CAN communication the display
shows “Connection lost”.
Possible reason
• Open circuit in multilink bus or multilink supply.
• Short circuit in multilink bus or multilink supply.
• Faulty tachometer/optional equipment such as dis-
play, NMEA interface, multi sensor.
Suitable action
1. Check multlink bus and connectors between the
multlink connector at the MDI and all connected
optional equipment such as display, NMEA inter-
face, multi sensor.
2. Try with another tachometer/optional equipment.
https://www.boat-manuals.com/
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