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Old 12-20-2009, 01:32 PM   #1 (permalink)
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Unhappy 2004 TRX400FA Fourtrax/Rancher



Thought I'd start a new thread of my own, just for the specific problems with the Honda ATV's which appear to be prevalant.

1. Code 6 - angle sensor. Many issues with these, replaced mine, problem is gone.

2. Code 12 - shift control motor (or circuit). I replaced the shift control motor, which after reading many forums, I understand a LOT of people do this as well and still have problems. Me too! Big surprise.

3. 4X4 is flashing 4 times, which indicates system voltage issue apparently? Has anyone had any encounters with this one?

Did I seriously pickup the biggest POS Honda in the world? After much reading online, I thought I was getting into one of the toughest and longest lasting ATV's in in the market.

I've di-greased most of the connections on the machine, and didn't see any obvious signs of corrosion.

I'm still blowing the 30amp shift control motor fuse, which leads me to believe there is some form of wiring issue, likely shorting to ground?

Does anyone have any recommendations or ideas?

When I start the machine, it goes right to the error codes, and I cannot drive it other than in limp mode. BRUTAL!!! Getting so frustrated with this thing.

Help, help, help, for the love of god ....
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Old 12-20-2009, 01:42 PM   #2 (permalink)
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I would start with the wires running to the fuse. Trace the wires to see if you can find were the short is.
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Old 12-20-2009, 01:50 PM   #3 (permalink)
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I agree with mudd99.
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Old 12-20-2009, 03:01 PM   #4 (permalink)
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Seems that I remember reading about faulty ecms and the dealers were picking up the tab. Cant be sure with out contacting the dealer tho. With 4x4 light flashing my guess is an ecm issue but thats just a guess.
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Old 12-20-2009, 04:59 PM   #5 (permalink)
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I agree with Saber and mud check the wiring first if you don't find anything then check into what saber was telling you.
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Old 12-20-2009, 07:17 PM   #6 (permalink)
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Hey guys - props for supporting a guy in need ! LOL. Really though, it's great that you support those with issues and less product knowledge than yourselves.

I used a multi-meter and traced the wires back per the troubleshooting schematic. Battery to ECM, ECM to the shift control motor, etc. I picked-up solid signal and the appropriate voltage to the ECM from the battery.

Could I really be the guy with a bad ECM? I've read dozens of forums where guys do all I have done (angle sensor, shift control motor, and ECM) and STILL have a dead ATV.

I found a line on a NOS (new old stock) ECM for around $100 shipped, which compared to the local dealer cost is a steal of a deal. I'm thinking of getting it just in case it is the ECM. I need to start plowing my driveway very soon, so I'm worried I'll be stuck without a machine.

Any other thoughts, comments, etc. would be appreciated.

I'm still concerned as to why I keep blowing the 30amp shift control motor fuse. For some reason the system is drawing in excess of 30 amps, but throughout the wiring system related to the shift control motor, all checked out. Baffled in Ontario.....
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Old 12-20-2009, 07:19 PM   #7 (permalink)
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Mind you I didn't check the wires going TO the fuse, just leading away from it through the shift control motor circuit. Shouldn't those wires come directly from a voltage regulator of some sort? Could this be why I'm having the 4X4 light flashing 4 times indicating a system voltage issue?

Thoughts/comments more than welcome!
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Old 12-20-2009, 07:22 PM   #8 (permalink)
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Just to be on the safe side I would check both sides.
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Old 12-21-2009, 06:27 PM   #9 (permalink)
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Quote:
Originally Posted by mud99 View Post
Just to be on the safe side I would check both sides.
I'll do that .....and I just ordered a new ECM.

So....IF I plug in the new ECM and go through the reinitialization process and the machine still gives me the error codes.....THEN WHAT?

I've read of this many times, and I'm scared that will be the result.

Fingers are crossed.....
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Old 12-21-2009, 07:06 PM   #10 (permalink)
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Found some info...


Click the image to open in full size.
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