2001 Yamaha 150txrz oil issues

[Captkeith]

Boscoe,

If there is correct amount of oil- there are no oil icons at all. If oil is low- I only get 1 blinking icon. I have never seen three oil icons on this tach. So if this is a wiring issue - what wires should I be looking at? I have replaced all the wiring related to the pbs. At least the ones I'm aware of. Remote tank wiring and switch and main tank switch and connector. Should I be looking for issues related to the tach wiring ? And if so- why would that affect the oil transfer ?

[99yam40]

Ah ha, maybe the answer to the missing icons has been found,
The suspense is killing me

[Captkeith]

I'll check the tach settings. But that doesn't fix my oil transfer problem. So what other wiring would I need to check? Also, the troubleshooting tree that's in the manual, says that's based on the info in the tree - following that informarion, my ecu would be the culprit ?

[rodbolt17]

out of the box the tach was set for 4 stroke,2 wire trim and 12 pole alt.

if you don't wish to check the tach unplug the connector with the green/white wire.
check for continuity between the green white harness side to ground.
should read less than 3 ohms or so.
if it reads more find and fix the circuit for SWB.

if it reads less look at your harness diagram.
find the pin at the ECU connector that goes to the blk/red at SWB.
check that ECU pin to ground, should read less than 3 ohms.
if more than fix that circuit.

however that is what the tach function would tell you at a simple glance.

[Captkeith]

Gentleman,

I've had some medical issues the last month that have kept me from working on this. But I really appreciate all the help.

Rodbolt-when you say " look at the connector with the green white wires and check for continuity", are you referring to a connector related to the oil or the tach ?

[Captkeith]

I assume you mean this one ?

[Captkeith]

Found the wiring diagram. I have found the connector and harness. When I test for continuity- I'm getting nothing. Not sure what that means. I know my meter works as I have continuity other places.

[99yam40]

out of the box the tach was set for 4 stroke,2 wire trim and 12 pole alt.

if you don't wish to check the tach unplug the connector with the green/white wire.
check for continuity between the green white harness side to ground.
should read less than 3 ohms or so.
if it reads more find and fix the circuit for SWB.

if it reads less look at your harness diagram.
find the pin at the ECU connector that goes to the blk/red at SWB.
check that ECU pin to ground, should read less than 3 ohms.
if more than fix that circuit.

however that is what the tach function would tell you at a simple glance.

Op you need to tell us what you are reading on the meter.
Not that I am saying you do not understand you meter, but some people may not understand continuity reading properly.

Rod gave you info on what to do if you found an open (no continuity)

Also why have you not checked the setting on the tach

[Captkeith]

I'll check that now

[Captkeith]

So here's what I have - I don't unsderstand looking at this how to see what the settings are set to ?

[Captkeith]

Ok so let's take this one at a time
Lack of ground to the remote tank switch.

It's a brand new tank float switch. I have tested it for continuity to ground and manually moved the switch positions and found them working

Remote switch failed open - I think I just covered this above ? But maybe I'm wrong.

Lack of ground from remote switch to ecu- all the wiring harnesss and connectors from remote tank to the pin where it changed color have been replaced new. The connector where it changes color back to the center pin on ecu has not.

Failed ecu- According to the shop manual flow chart troubleshooting chart - that what it says is my issue. But you guys are the experts and I certainly am not. So this is why my head is spinning

[rodbolt17]

pull the tach back out.
remove the rubber plug.
look carefully there are 3 switchs labled SW1 SW2 and SW3.
there is also small letters with on and off.
settings for a two V4/V6 stroke from about 2000.

SW1=on.
SW2=off.
SW3off.

with your meter at the tach,heck your there anyway, connect it using the ohms scale or the audible if your meter has it,

unplug the two wire connector with the green red and the green white wires.

hook the meter,using a jumper lead as nessasary, from the harness green/white to the engine block.
if you have NO continuity or above about 7 Ohms fix the ground path to the remote,the remote tank switch.

post back the results, if it passes there is one more test.

[Captkeith]

Ok. Thanks. I'll check that now. But also just found this on the back of the ecu. Looks like a hole that has been maybe burned ? Thru ? I certainly don't think this is normal.

[Captkeith]

It's direct,y above the center pin.

[Captkeith]

My tach settling were set to 4 stroke. Hard to believe this for a 15 yr old motor.