How to gain access to the Diagnostic Mode CO adjustment

[~TABASCO~]

I wouldn't do that, as the service manual refers to a Test harness that plugs into the plug, so the wire could be used for test purposes

X2 dont do that....

 

[~TABASCO~]

Good find Bundu. I spliced a pigtail off of my wire and added a quick-disconnect under the seat. I can easily access this and ground it when I need to make an adjustment. I would think I will not be making anymore adjustments once I get it dialed in.

SPEED,

Do you have your CO on 6 with your PCV active? What do the cell's look like from the 0- 4-6-8 Etc? How is the PCV pap influenced with the CO "6"...

 

[SpeedStar]

Yes, I have my settings at 6 with the PCV active. I am using a map from Kees that I tweaked based on what I was feeling with the butt-dyno ::26::.
I don't have my map here at work, but I could email it to you if you want to check it out.

 

[~TABASCO~]

Yes, I have my settings at 6 with the PCV active. I am using a map from Kees that I tweaked based on what I was feeling with the butt-dyno ::26::.
I don't have my map here at work, but I could email it to you if you want to check it out.

Cool.. yea for sure... I have the PCV-AT on the way so we can cross the AT maps aswell.... We all can have a nice bank of what might work best for there scoots.... and the possibilities with the PCV...

 

[DuMar]

I also discovered if you push on the trip button with the key off it will display the clock for a few seconds. Not sure if anyone had discovered that yet or not, I don't get here too often.
[/quote]

Peter,

"The clock displays when the key is turned to "ON". In addition, the clock can be displayed for 10 seconds by pushing the left button when the main switch is in the "OFF" or "LOCK" position." Page 4-9 in the manual.

Mike

 

[DuMar]

While talking to the Yamaha technician about Airscrew adjustment fix that I posted in another thread, I asked him about gaining access to the diagnostic mode CO adjustment and he said it is possible, but was not supposed to broadcast it. So I am broadcasting it for him...

He said you simply ground the light mint green wire that is coming out of the tip-over sensor under the rear pillion seat.
By grounding this wire, you can then access the diagnostic mode and make adjustments to the CO settings.

He did say to only make a maximum of 7 point jump in each setting at a time and try it.
I guess this was also an issue on the FJR.

I connected a wire with quick disconnect on the end to he able to access the function once the seat is back in place.
He did not say if there was an issue leaving it grounded so I made it easy to remove when finished with the adjustment.
I just tried it and it does work as described. I increased each from 0 to +8. I will try it and see what difference it makes.

Here is the sensor and connection that I used.

Here is where I grounded with my pigtail.

Give it a try guys and let's compare results.
Do remember your original settings in case you want to go back.

Devin,

I noticed you don't have an additional connector under your seat. There's a 4-pin connector under mine that I'm guessing plugs into a diagnostic/tuning instrument of some kind. And guess what? That pale green wire is on one of the pins!

Mike

 

[SpeedStar]

That connector is under the seat bracket. You just can't see it in the pic. Good to know where it goes though.

 

[Behmer]

So, reading a few of these posts talking about the wire going from the sensor to the test lead under the seat I had to take a look. Same color wire with the same markings on it. I tried to check for continuity from point to point and don't have any. Made no difference with key on or off. I don't have have a wiring diagram so I have nothing to go off of. I thought I would be able to use the wire from the test lead to get to the CO settings but it looks like not. Thoughts?

 

[Koinz]

So, reading a few of these posts talking about the wire going from the sensor to the test lead under the seat I had to take a look. Same color wire with the same markings on it. I tried to check for continuity from point to point and don't have any. Made no difference with key on or off. I don't have have a wiring diagram so I have nothing to go off of. I thought I would be able to use the wire from the test lead to get to the CO settings but it looks like not. Thoughts?

Just curios, what are you using to test for continuity. Seeing as this connection seems to enable a function on the computer, you probably won't see continuity. Perhaps it opens or closes an electronic gate that enables the diagnostic function.

You might be able to see a high resistance on the circuit. That would make sense since a lot of electronics equipment are stepped down in voltage to 3-5 volts.

 

[Behmer]

Just had my first peak at a service manual for our bikes and went right to the schematic. The lean angle sensor wires are coming from the engine ECU. The test lead under the seat goes to the ABS ECU. The green wire may be the same color and marked the same but they aren't the same wire and aren't tied together anywhere.

 

[tomatocity]

Yesterday Mark of the Harmonizer was over and we completed the airscrew adjustment. It now idles at 0 balance at 1100 rpms (well very small variations). The adjustment smoothed the acceleration and stopped the off idle stumble. I want to ride it more before changing the CO (one thing at a time). Looks like all of you have done a very good job of documenting your changes and procedure though I have not seen any photos of the Diagnostic Display. I am guessing the 'screen / display' that is being referenced is the display on the super tenere. Any photos of the display in the diagnostic mode? What buttons change the CO settings? Thanks.

 

[~TABASCO~]

Tomato, If you dont get the CO settings tonight, I can Email them to you tomorrow or in a PM.. I have them at the office. Ill be at work tomorrow, if you have any questions changing the settings feel free to call.. ~ Jaxon

 

[SpeedStar]

Yesterday Mark of the Harmonizer was over and we completed the airscrew adjustment. It now idles at 0 balance at 1100 rpms (well very small variations). The adjustment smoothed the acceleration and stopped the off idle stumble. I want to ride it more before changing the CO (one thing at a time). Looks like all of you have done a very good job of documenting your changes and procedure though I have not seen any photos of the Diagnostic Display. I am guessing the 'screen / display' that is being referenced is the display on the super tenere. Any photos of the display in the diagnostic mode? What buttons change the CO settings? Thanks.

Tim, glad to hear of your good results. I just used my Harmonizer tonight to further dial in my setup as well.

 

[~TABASCO~]

Tim, glad to hear of your good results. I just used my Harmonizer tonight to further dial in my setup as well.

Can you post a picture of the Harmonizer? Dont think I have seen one...

 

[SpeedStar]

Can you post a picture of the Harmonizer? Dont think I have seen one...

Jaxon, check this thread for more details.

http://www.yamahasupertenere.com/index.php?topic=2051.0

 

[~TABASCO~]

Thanks dude !

 

[tomatocity]

Jaxon, you won't regret buying and using the Harmonizer. Your shop will be a better place.

 

[Twisties]

After reading this thread and the airscrew adjustment thread I am just a little confused.

I have a 49-State model that idles properly and has no stumble.

The airscrew adjustment would not be applicable for me then, correct? It's purpose is not a performance enhancement so much as cure for a problem related to mostly CA-model bikes?

The CO adjustment on the other hand is related to performance enhancement as opposed to correcting a problem? It is being done only by those that have re-mapped their fueling computers or installed aftermarket fueling computers or is of benefit to all bikes? It is intended to increase low rpm HP and torque? What are the pros and cons of this adjustment: Fuel economy, emissions, cat converter, legality? How do you judge the correct amount of adjustment?

 

[3putt]

Jan, I think to properly adjust the CO, you would need to have a fuel/air ratio meter or CO emissions sensor inserted into the exhaust. We are assuming here that to pass emissions, these bikes are purposely set lean, thus bump them up +6 or +7. No way to check without proper equipment.

The airscrew adjustment is similar to the BMW R motor TBS. Some people balance at idle and 3k rpm or normal cruising speed RPM. I adjusted mine at idle did check it at 3k rpm briefly and it was the same (balanced). The TBS should be checked from time to time.

P.S. Don't tell Bill W.! (to those that don't know Bill on facebook, he is our local GREEN GURU)

 

[tomatocity]

Tomato, If you dont get the CO settings tonight, I can Email them to you tomorrow or in a PM.. I have them at the office. Ill be at work tomorrow, if you have any questions changing the settings feel free to call.. ~ Jaxon

PM sent. Thank you.