2003 Z150TRLB ECM Main Relay Issue

[99yam40]

I've ordered the test harness for the ECM peak voltage test.
"Tested fine" means that I measured the expected voltage given ground and power. (so, if the circuit is a ground - I tested black lead on multimeter to that point, and then red lead to positive battery post)... received 12.68v

I would not think the relay should be energized with the key in the off position, a good ground with 12 + on the other side of coil of relay should energize(pick up) the relay

I still want to know what the ECU peak voltage you are going to measure goes to(is suppose to do)

[boscoe99]

Where in the hell is rodnut?

He is not going to be wanting to miss this thread.

[boscoe99]

His explanation about the one relay staying energized even without the key on when both relays are in place has me scratching my head if both are energized with the same Blue/yellow.
Not to mention the new relay he put in will not energize

I'm scratching both my head and my nuts.

[Mr. Nice Guy]

The relay is not energized with the key off (since, there's no positive power feed on the opposite side of the relay).

Here's exactly what I did:

I had already determined which blade of the relay socket represents the ground feed from the ECM.

I pulled the relay out of the socket.

KEY OFF
I put the negative lead of my multimeter into that blade - then, put the red lead of the multimeter to the battery. It tests at 12.68v (seeming to indicate a clean circuit)

KEY ON
I put the negative lead of my multimeter into that blade - then, put the red lead of the multimeter to the battery. It tests at 8.18v (the ground activated in the ECM appears to be faulty, right?)
I put the negative lead of my multimeter into the ground blade (same as before) - then, put the red lead of the multimeter to the positive power blade of the relay. It tests at 8.18v

[Mr. Nice Guy]

What I can't figure out is why I have a blue/red (L/R) wire - when there isn't one anywhere in the diagram for this connector. Is it common for the motor to not match the service manual?

[rejesterd]

What I can't figure out is why I have a blue/red (L/R) wire - when there isn't one anywhere in the diagram for this connector. Is it common for the motor to not match the service manual?

What ultimately matters is the pin numbers match up on each end to the same color wire. Normally, blue with red stripe is for the oil level sensor, so it's a surprise to see that used in the relay.

[Mr. Nice Guy]

Well, I've been doing more research - and, I've found a supplemental manual for my specific model - and, the colors match!! I'll post the "new" diagrams shortly. I'm working on trying to figure out exactly what each pin-out on the ECM represents.

[boscoe99]

Well, I've been doing more research - and, I've found a supplemental manual for my specific model - and, the colors match!! I'll post the "new" diagrams shortly. I'm working on trying to figure out exactly what each pin-out on the ECM represents.

What is the document number please?

[pstephens46]

I'm scratching both my head and my nuts.

Amazing the uses people find for WD-40.

[99yam40]

What I can't figure out is why I have a blue/red (L/R) wire - when there isn't one anywhere in the diagram for this connector. Is it common for the motor to not match the service manual?

as I said before they do have problems from time to time with errors, but I did not know they ever sent out corrections

[Mr. Nice Guy]

what is the document number please?

68l-28197-za-1x supplementary
service manual

[Mr. Nice Guy]

These are the full versions of the wiring diagrams:


http://www.d21tech.com/public/YamahaSupWire.jpg
http://www.d21tech.com/public/yamahaSupColors.jpg

[99yam40]

they do not work for some reason

[Mr. Nice Guy]

they do not work for some reason

Ok, I fixed the links.

[rejesterd]

This might sound dumb, but did you go through the troubleshooting section in the manual for the engine-does-not-start condition? It's actually quite good in most of the manuals I've read. It's meant to keep you out of rabbit holes.

I'm not sure I understand the reason for testing anything except continuity if the engine starts when you bypass the relay. If continuity is good from the start switch to the main relay, and the wires are in the right pins according to the diagram, I would take a break and go back through the troubleshooting map.

Never a bad thing to learn more about wiring though.