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Yanmar 6LY3-ETP 480HP problem

gardarkristjans

New member
Hi there i´m new in this group.

I have a Yanmar 6LY3-ETP
i8320P Engine Interface Module
Yanmar i5601e Display
CH64600: Single Control Head

The problem is that i don´t get any information to the display from the engine (I see the control head in the network nodes but not the i8320P)
I have the T connectors and male and female terminators
This is the diagram for the connections
The three leds on the ECU - I always see NMEA ligth blink and sometimes the Engine Com Blink but never seen the ECU status light.

Screenshot 2021-04-27 at 21.06.24.pngScreenshot 2021-04-27 at 21.06.16.png

And one thing i noticed is that when the engine is running the Volts drops down to 9V for a few minutes and then go back to 12.

Does anybody have any clue what is going on?
Sorry for the typing :)

Best regards
Gardar
 
I can't help you with your display issue except check it with a known working unit or call Mack Boring to check yours out.
My Yanmar does the same voltage drop on start. There are intake heaters that come on and drain the hell out of your batteries for a couple minutes. This helps with cold starting and emissions.
 
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