R25 sc- missing data on i5601

[zachsail89]

I'm having an issue with missing data on the i5601- I'm currently just getting dashes for my oil pressure and fuel level. I've checked every connection i could possibly find and have sent my ecu box out to mastery marine for the oil update version and did the ground bulletin. I can't seem to figure out why I'm not getting dashes for values. I also get the same thing on my garmin gps- no values for the oil pressure or fuel level. Both the fuel sender and the oil pressure sensor test and ohm out fine.... please help

 

[CaspersCruiser]

Yanmar engine data are sent via a NMEA 2000 cable that runs from the engine to the NMEA 2000 backbone on your boat. From there it is available to the various using components, in your case the i5601 and Garmin chartplotter. Are the i5601 and chartplotter getting RPM, fuel flow and coolant temperature indications? If so, my hunch is that the NMEA 2000 cable is OK and that the missing oil pressure is related to the sensor or the connection between it and the ECU. I do not know how fuel level is communicated to the i5601, but, again, my hunch is via NMEA 2000. Maybe someone with that knowledge will respond.

 

[zachsail89]

Yanmar engine data are sent via a NMEA 2000 cable that runs from the engine to the NMEA 2000 backbone on your boat. From there it is available to the various using components, in your case the i5601 and Garmin chartplotter. Are the i5601 and chartplotter getting RPM, fuel flow and coolant temperature indications? If so, my hunch is that the NMEA 2000 cable is OK and that the missing oil pressure is related to the sensor or the connection between it and the ECU. I do not know how fuel level is communicated to the i5601, but, again, my hunch is via NMEA 2000. Maybe someone with that knowledge will respond.

Yes I'm receiving the fuel flow-rpm- coolant temp.... I was assuming the same as the backbone was probably not it or I would be loosing all data.... the oil semsor and the fuel sensor both ohm out to normal range and fluctuate with moving the sensor or pumping air into the oil sensor... so the sensors themselfs seem to not be the issue. I think my problem is possibly the signal getting from those sensors to the ecu.... I'm guessing I need voltage on these lines but I'm not sure really how to test that as the harness from the oil sensor disappears into the abyss of a loom... can I just measure voltage from the leads off the oil sensor... and if I'm not getting voltage what the heck and from where or what pinout feeds it voltage... ?

 

[CaspersCruiser]

I think you’re correct that somehow the data is not getting from the oil pressure sensor to the ECU. I really have no clue how to check the validity of the data transfer between the oil pressure sensor and the ECU. I hope a knowledgeable person will come forward to help you. The same applies to the fuel level.

 

[zachsail89]

I think you’re correct that somehow the data is not getting from the oil pressure sensor to the ECU. I really have no clue how to check the validity of the data transfer between the oil pressure sensor and the ECU. I hope a knowledgeable person will come forward to help you. The same applies to the fuel level.

Problem solved! I got the pinouts for the connectors for the wiring harness from mastery. I was ohm each line at each end to see if they'd have continuity.. whelp found it! My pin on the yanmar i8130 plug the female side wire #B was damaged and not contacting the male side of the ecu box... my conclusion is this powers the sensors and this is why my i wasnt showing data on a cpl of lines! Hopefully this helps you or someone else down the road! Certainly better than buying the $1200 replacement harness that wasn't in stock....

 

[Trisailor]

I think you’re correct that somehow the data is not getting from the oil pressure sensor to the ECU. I really have no clue how to check the validity of the data transfer between the oil pressure sensor and the ECU. I hope a knowledgeable person will come forward to help you. The same applies to the fuel level.

I too, have lost the fuel and oil pressure gauge indications on the i5601e. As a workaround, I kluged in an analog automotive type oil pressure gauge and similar fuel gauge at the helm have proved the sensors are working and is an indication that the CAN bus input to the NMEA 2k network is working. I think my issue resides in the ECU but have not spent the time necessary in the boat yoga position to chase wiring and connections into and inside the ECU. I have also replaced the teleflex interface with a new one with the upgraded software. The addition of the extra gauges gave me peace of mind to recently complete 1500 miles of the great loop. Did the around Florida and up the eastern ICW to Virginia. Plus, the fuel gauge is merely a backup of having the Garmin track and display fuel quantity on the MFD. It was good to have since I somehow fat fingered a fuel input into the Garmin and thought there was more fuel in the tank that was actually there.

 

[zachsail89]

I too, have lost the fuel and oil pressure gauge indications on the i5601e. As a workaround, I kluged in an analog automotive type oil pressure gauge and similar fuel gauge at the helm have proved the sensors are working and is an indication that the CAN bus input to the NMEA 2k network is working. I think my issue resides in the ECU but have not spent the time necessary in the boat yoga position to chase wiring and connections into and inside the ECU. I have also replaced the teleflex interface with a new one with the upgraded software. The addition of the extra gauges gave me peace of mind to recently complete 1500 miles of the great loop. Did the around Florida and up the eastern ICW to Virginia. Plus, the fuel gauge is merely a backup of having the Garmin track and display fuel quantity on the MFD. It was good to have since I somehow fat fingered a fuel input into the Garmin and thought there was more fuel in the tank that was actually there.

Seems like yours is identical to my issue. I had verified the sender and sensor was working. Once I got the pinouts from mastery I went to work.. I would check where the black box plugs into. There's white covers and once you pop them out you can see the pins. The one that was my issue was wire B.....on the the connector for the black box it is in position A/3 it is a red wire not that colors matter all the time. The female side on the wiring harness was my issue.

 

[Trisailor]

Seems like yours is identical to my issue. I had verified the sender and sensor was working. Once I got the pinouts from mastery I went to work.. I would check where the black box plugs into. There's white covers and once you pop them out you can see the pins. The one that was my issue was wire B.....on the the connector for the black box it is in position A/3 it is a red wire not that colors matter all the time. The female side on the wiring harness was my issue.

Thanks for the info. I was planning to look in that direction when I next start chasing that problem.