Engine warning light

I have no dought that an oil change might ffix an oil sending unit that has problems with dirty contacts.i was going on a statement i think went like this driving down the road at 80 mph light was flickering (i estamate about 3000 rpm) so i know u had oil pressure
And then assumed the switch was bad
Was unaware that it was fixed.
So i will just wish u luck on whatever it is u will b doing.
 
TURBO200R4 said:
Of coarse u r free to do what u want
But if it were mine i would replace oil sending unit clear codes and see what happens.
Now the alternitive is to go pulling on wires till u cause another pronlem. Good luck in fixing your bike.
Click to expand...
Ya the messing with the wiring really is hit and miss. A needle in the haystack is what I turns into... I had started tracing the wiring to the sending unit. Problem. It seems to be on the backside of the engine. Is it accessible by taking the gas tank loose bracing it up, and maybe removing the air intake duct? Not easy to trace the wiring. The wiring gets wrapped together and I’m not sure exactly where the sending unit is. I found a two wire set up with a connector loose. The connector is filled with what looks like expanding foam. Any ideas what that’s for?
 
I don’t think that this problem is going away. I ran the engine and the light is back, flickering as before. If anybody has a picture of the sending unit, where it’s at or just a experience of getting at the darn connection, I would appreciate it. Thanks. By the way, Im sure the engine isn’t starving for oil. Turbo200r4 is correct. This light problem, if true, would have wrecked the engine by now.
 
Sender is at rear of engine, an inch or so below valve cover. Has one wire eye terminal that screws to sender, this connection could be loose and causing your problem. Takes a phillips screw driver to turn it. Look through openings on exhaust side and you can see it. Probably have to remove tank and seat to get to it, also plastic cover each side. Can look in Hermy's parts breakout at their web site to see a picture as well as a price.
 



The oil sending is at the rear of engine just below the valve cover at right side of engine.
I think a screw with phillips head on the wire. Be very carefull when tighting. Make sure u check oil tank is staying full while running and revving.
There r ways of checking the wires. Wire checking may be complicated and best done after changing sender.
Any pieces u can leave off in order to disconect wire would be good.
Reprase in order to check wires
The wire has to come off sensor

I dought if anyone has experience with the code u have it might just disappear when u fix the sendor
 
Fellows, doesn't the oil pressure sending unit simply provide a ground for the idiot light in the dash (Not sure here)? If so here are some suggestions;
1. A defective sensor could turn the light on. Replace or test it with an ohm meter. If it is giving you continuity while running or when tapping it (assuming you have good engine oil pressure) replace it. The spring inside could be broken or contacts partially fused.
2. A loose wire connection to the sending unit wouldn't turn the light on.
3. A grounded wire (insulation rubbed through for example) could turn light on intermittently. Also if the wire fell off the sending unit or was broken and was touching the frame could turn it on.
4. Moisture in one of the connectors (ECM, dash, etc) could ground the circuit intermittently or provide a short to another circuit through the moisture.

Just trying to think outside the box. I'm not sure from the prints if the idiot light actually grounds through the sending unit or if the sending unit tells the ECM to turn the light on....
 
ok u r making me to put on my thinking hat
your info is correct
the problem with checking with ohm/volt meter that it is an intermittent problem (going 80 mph)
my thinking is that the sensor is grounded completing the circuit (turning light on) and oil pressure ungrounds it breaking the circuit (turning out oil light)
my thinking is something shorting inside the sensor causing the light to flicker
my thinking is i do not know if the ecu furnishes the power i believe the ecu might monitor the circuit and on some cars can shut down the engine if the signal is lost.
also i think if i had a light bulb that was not working i would replace the bulb before checking wires/ power/ fuses/ ect
 
TURBO200R4 said:
my thinking is that the sensor is grounded completing the circuit (turning light on) and oil pressure ungrounds it breaking the circuit (turning out oil light)
Click to expand...
That's exactly what I thought but when I took a look at the prints again I noticed that the sending unit appears to be open, not closed at rest, exactly the opposite to what I was thinking. If it's open at rest that would indicate the contacts close when they see oil pressure??? What do you think???? Look at this circuit. The sending unit is #20. I would need to put an ohm meter on it to see what the orientation of the sender is to confirm the logic around the idiot light activation. If it is like this, then some of my comments in post 47 might be wrong.

Looks like I was using the wrong diagram fellows. My bad.

 
Last edited:
Wont change the bulb on a touring sucessfully
 
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