TOPS Solenoid By-Pass

Dsw1

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Location
Adelaide
Water Crafts
2003 GTX 4-tec NA
#1
Hi All,

I have a 2003 GTX 155 4TEC, I have installed a 2011 motor in it using all existing running gear, including the ECU and MEM.

The 2011 motor doesn't use the TOPS valve. All is good however to get the ECU to behave I have to leave the TOPS solenoid connected to the wiring harness in the engine bay else the ECU flags error and wont start.

My question is, does anyone know how to electrically bypass the TOPS solenoid? Ie: can I put a resister or blank of some type on the plug to trick the ECU into believing the TOPS solenoid is installed?

My backup plan is to remove the plunger / shaft from the solenoid, heat shrink the remaining solenoid with it still connected to the wiring loom to seal it off from fumes and then tie it away somewhere in the engine bay.

Thanks,
David
 


IDoSeaDoo

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Davie, Florida
Water Crafts
1995 Sea Doo XP800 (future project)
2009 Yamaha FX HO
1997 Seadoo Challenger 4tec
#2
Yep. I have blocked my TOPS off in my boat. I believe I used like a 10k ohm resistor to block it. Maybe try measuring the resistance of the TOPS solenoid and go by that? I had a bunch of different resistors and found one that doesn't give error code :) It definitely CAN be done, I just don't recall the exact resistance value.
 

Dsw1

New Member
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Location
Adelaide
Water Crafts
2003 GTX 4-tec NA
#3
Thanks for the feedback. I did actually try this already and burnt out my resister. I used a potentiometer. I also did measure the solenoid as a starting point but I reckon the resistance under load will be somewhat different to when sitting on bench. I might try again with a variety of resistors.
Thanks
DW
 

IDoSeaDoo

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Location
Davie, Florida
Water Crafts
1995 Sea Doo XP800 (future project)
2009 Yamaha FX HO
1997 Seadoo Challenger 4tec
#4
Yea, I went through a couple before I found one that worked. I had a huge assortment of them from my Arduino hobby days.
 

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