Cruise install

[silverback]

I went ahead and ordered a Rostra universal cruise control for my 05. I had one on the 07 and it worked famously. So, would it be worth while to do a video documentation series on the install? It seems there were a few write ups on this, but nothing terribly concise and it left me with a lot of trial and error.

Also, how much difference in the wiring harness between an 05 ABS and an 07 is there? Specifically, is the orange wire at pun 18(?) the speed signal to the ECM as it is on the 07?
I have an 07 manual I'd trade if someone has an 05 ABS gathering dust.

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[raYzerman]

I think the ECU connections are somewhat different, but on the Gen II, it is the orange wire in the second position, or the grey w/red in the third position (from the front, if memory serves). Either one can be used, as each one simply goes to a different coil... not sure of the cavity numbering as I can't determine from the wiring diagram. I'll guess, cavity 2 and 3. Hope that helps. Posted somewhere is an older Audiovox thread...... I'll look.

Edit - A couple of links added.......
http://www.fjrforum.com/forum//index.ph ... l=audiovox" onclick="window.open(this.href);return false;
http://www.fjr1300.info/howto/audiovox.html" onclick="window.open(this.href);return false;
http://www.fjrforum.com/forum/index.php?showtopic=16440" onclick="window.open(this.href);return false;

[silverback]

Yes, gen 2 was orange wire in 18 I believe. I have that book. I need gen 1. I will look at your references. I'll see what I can come up with.

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[ionbeam]

The coil wire colors are the same for the Gen I and Gen II -- Orange and Gray/Red. I chose to make a Tee to tap the coil wire at the coil and not have to mess with the insulation or pins at the ECU. On the Gen I the coil with the Gray/Red wire is most accessible. It doesn't matter which wire is tapped.

[blrfjr]

Since I also ride the fastest fjr (05), I would love it if you would make a video of your install

[silverback]

I found the write up I did on another website from my 07. Seems it was the white with yellow wire that is in the ECU terminal 18 that is the communication between the ABS module and the ECU. This is where I picked up the wheel speed signal for the Rostra before. I tried using the direct signal from one of the wheels, but the signal was not suitable for the cruise to read. The signal between the ABS and the ECU was modified well enough the cruise module could use it.

The tach signal was an accessory signal the Rostra used to sense an engine over speed and figure out whether you disengaged the clutch in the absence of a clutch switch when you had manual transmission selected. It never worked and the engine would over rev anyway. I think, from what I have read, the Audiovox would use the tach signal in lieu of a VSS signal. I don't think the Rostra will do that IIRC.

So, I will have to look into the diagrams of the Gen 1 ABS bike to see where everything is.

If anyone is interested, my previous writeup and some pretty hideous handiwork is shown here:
http://www.fjrowners.com/forums/10-fjr- ... stall.html" onclick="window.open(this.href);return false;

[silverback]

Since I also ride the fastest fjr (05), I would love it if you would make a video of your install

I will try to do my best. I am not very videogenic, and time pressure is tough right now with my schooling and work and such. However, I should be able to do some highlighting and some good shots of the process. I'll be sure to wear my "Vader is coming" tee-shirt for the special occasion...

[ionbeam]

...Seems it was the white with yellow wire that is in the ECU terminal 18 that is the communication between the ABS module and the ECU. This is where I picked up the wheel speed signal for the Rostra...

The tach signal was an accessory signal the Rostra used to sense an engine over speed and figure out whether you disengaged the clutch in the absence of a clutch switch...

So, I will have to look into the diagrams of the Gen 1 ABS bike to see where everything is...

The AVCC is different than the Rostra. The AVCC only needs one engine speed signal and the cruise will use that for both speed maintenance and detecting clutch action. The Gen I VSS signal is too fast for the AVCC to use so the next best option is the coil wire. Pin number at the ECU connector doesn't matter, there is just one Orange and just one Gray/Red wire. IMO, I would tap the coil signal at the coil and not mess with displacing wire insulation or pins on such a critical signal. The AVCC will control speed more responsively using the coil signal over an ABS wheel signal. IMO, the ABS signal is one of the worst choices for a signal source because it is so critical. Rostra may have asked for that wire to be tapped but it is not a good signal source for the AVCC. IMO, the ABS wheel signal is a bad choice because the signal is so critical and the wave shape is not what the AVCC is looking for.

Related, be sure that the AVCC dip switch position 7 is switched OFF. Some of the earlier HOW-TO instructions asked for SW 7 to be ON, but it should in fact be OFF. The Gen I isn't as sensitive about SW 7 as the Gen II, but OFF correctly tells the AVCC that the speed signal source is coming from the ECU and not a point-breaker system.

FWIW, this is what I made for a no splice, no cut connection at the coil terminal:

[Name Etc.]

has anyone seen the components to make up the new factory cruise. curious if it can be adapted to the older bikes or if the TBW bit screws that all up?

[ionbeam]

has anyone seen the components to make up the new factory cruise. curious if it can be adapted to the older bikes or if the TBW bit screws that all up?

If you are referring to the '13 and up Gen III it can't be adapted for less than the cost of a new bike. The Gen III cruise needs the 'drive by wire' throttle system to work. Don't even think about trying to retrofit a drive by wire on an older Gen. The Gen III cruise is done in software with no unique cruise control hardware.

[silverback]

...IMO, the ABS signal is one of the worst choices for a signal source because it is so critical.

I have to disagree with that. The nature of ABS is such that it can not be critical. The brakes must operate fully in the event of a total ABS failure. Also, the signal I used on the 07 was the signal from the ABS module to the ECU which would not prevent speed information from the wheels getting to the ABS module in the event of an open circuit. It might, however make speed related ECU function stop working. Possibly the speedometer, odometer and egr function (don't remember if the FJR has EGR). I looked over the 07 shop manual and couldn't find anything to justify the white/yellow wire inhibiting ABS function. However it is possible, its often difficult to tell what electronic devices will do when faults are introduced.

But, it worked quite well on my 07. I never had any troubles and the ABS worked as designed.

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[ionbeam]

...IMO, the ABS signal is one of the worst choices for a signal source because it is so critical.

I have to disagree with that. The nature of ABS is such that it can not be critical. The brakes must operate fully in the event of a total ABS failure...But, it worked quite well on my 07. I never had any troubles and the ABS worked as designed...

That's why I said In My Opinion. If I were in an emergency situation causing me to grab the brakes with confidence because I have ABS, only to find that I don't have functioning ABS and my front wheel locked...

You and anybody else that wants to tap the ABS, it's your business, I just wanted to mention that it is not risk free and could get expensive quick if the ABS ECU gets damaged. I stand by the AVCC being slightly more responsive with the coil tapped instead of the ABS and IMO the coil is a better signal choice because that is the wave form that the AVCC is designed for.

[silverback]

I apologize if I sounded abrasive. I wasn't trying to be.

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[silverback]

I had some time to study the circuit diagram a bit. It seems the wheel speed signals are too low voltage, high frequency to drive a rostra, as I found on the 07. So, the only other wire I can see of use might be the black/white wire between the ABS ECU and "Multi function meter" which I assume is the instrument cluster. I am guessing the wire is the signal wire that drives the speedometer and odometer functions.

I hope this might be a "processed" signal with a stronger and lower frequency signal than the pure wheel speed signal.

Has anyone ever checked this wire with a scope? There isn't a lot of description in the manual about how the speedo gets its info or where. I don't have a portable scope anymore, so I am hoping someone before me has walked this path.

Otherwise its time to look at finding a signal buffer from an old GM or making something with the help of an EE major at school.