I have this minor but very annoying problem. The coolant lever alarm is buzzing like crazy and it wouldn't stop. I looked up the schematic and it seems simply enough to disable it. But the buzzing noise keeps buzzing on. I located the source of the buzzing sound back to the ecu#2. I don't want to disconnect it because of its other functions. I tried grounding that wire but that didn't help. I like to know if anyone out there know how to disable it the coolant lever alarm. Btw, don't say just fill up the coolant. I took out the lever sensor so its no longer in equation. I don't want to go into details about why it is not there in the first place. Well, any feedback from you rotor gurus would be helpful...

 

OOPS I didnt read all the way down LOL

 

there is no sensor involved here...

 

Maybe your sensor has gone bad -- mines was okay after ~80k miles, but it was still okay. The bolt did crack, so I had to replace it. As for disabling it, I really don't know how it to do it... I would 1st make sure the connections are good by cleaning it with some electronic contact cleaner (mines was full of gunk) -- then go from there.

 

I don't think anyone on this forum will endorse running without one considering how many people have coolant problems on their 3rd gens.

With that said, I beileve that it measures the resistance between the actual coolant and the block, so you should be able to either ground it or add a small resistor in series with it, to ground.

But fixing this symptom instead of the problem doesn't sound prudent.

 

i forget the exact wire, but its in the 2 larger conectors near the factory batery location. i believe its a brown wire (forget if there is a tracer or the color if it IS a b/? ) its in the one that has more wires than the other....
you can see it in the schematics. splice in and gound it. its not recomended, but i guess you *could* do it....

 

thanks for the words of warning. i realized that consequence is great but... well, i doubled check the schematic and still can't find a solution. is it the black/white wire? i tried that but it doesn't work. anybody else??

 

Check here:

https://www.rx7club.com/showthread.p...hreadid=211814

 

https://www.rx7club.com/showthread.p...coolant+ground

 

i knew there was a thread about this somewhere but i couldn't locate it. i did a number of search but no luck. anyway, thanks for the links. i will test them out tommorrow. thanks fellows...