Engine cuts out at 12 MPH

[brad bevins]

I recently bought a 2015 Pioneer 700 that needed work. At about 12 MPH the engine cuts out which makes me think of a seat belt safety switch but the wiring diagram does not show a safety switch and there are no wires near the inside seat belt buckles. If I unplug the speedometer wires at the differential, then it no longer cuts out and drives much faster. Any ideas how to fix it correctly?

 

[NTCPrezJB]

Any dash lights especially sequence of flashes before/at startup? Thinking here that the machine could be putting itself in limp mode.

And at the risk of asking a dumb question…if the seatbelts are fastened does the problem persist? I’m assuming yes being that you already thought seat belt safety switch.

 

[ChadD]

Any dash lights especially sequence of flashes before/at startup? Thinking here that the machine could be putting itself in limp mode.

Here we go again 🤦‍♂️. Now you're a p700 mechanic 🤔🤪🤣🤣🤣🖕🤣🤣🤣


#NTC 😎

 

[dweber23tr]

Plug the seat belt in and try again before any more additional trouble shooting.

 

[Mopower58]

Here we go again 🤦‍♂️. Now you're a p700 mechanic 🤔🤪🤣🤣🤣🖕🤣🤣🤣


#NTC 😎

Scoogle II 🤣🤣

 

[Rayger143]

Surprised the cops haven’t showed up!

 

[JACKAL]

I recently bought a 2015 Pioneer 700 that needed work. At about 12 MPH the engine cuts out which makes me think of a seat belt safety switch but the wiring diagram does not show a safety switch and there are no wires near the inside seat belt buckles. If I unplug the speedometer wires at the differential, then it no longer cuts out and drives much faster. Any ideas how to fix it correctly?

Did you try fastening the drivers seat belt? I don't thjink the 2015 MY had that sensor but I never had a Pioneer 700,

 

[Remington]

I recently bought a 2015 Pioneer 700

Welcome from Michigan
Pics Or It Didnt Happen!

 

[brad bevins]

There are 30 flashes of the round seat belt light on the display each time I turn the key to the "on" position. The SXS was missing seat belts when I bought it. I purchased aftermarket seat belts that have no wires for confirming that the drivers seat belt is buckled. I don't see wiring behind the seats to plug a wired seat belt into or to "jumper" it. I agree that it must be going into limp mode but don't know how to stop it other than disconnecting the speedometer wires. Is there a table for understanding the display flashes?

 

[Mopower58]

Welcome from Mississippi. Ocean Springs,Ms.?
#NTC

 

[NTCPrezJB]

There are 30 flashes of the round seat belt light on the display each time I turn the key to the "on" position. The SXS was missing seat belts when I bought it. I purchased aftermarket seat belts that have no wires for confirming that the drivers seat belt is buckled. I don't see wiring behind the seats to plug a wired seat belt into or to "jumper" it. I agree that it must be going into limp mode but don't know how to stop it other than disconnecting the speedometer wires. Is there a table for understanding the display flashes?

View attachment 409224

Record the flashing sequence and post the video to YouTube or similar then post that video link to the forum. Some of the smart peeps on the forum can help you figure out what they mean.

It should be a series of short and long flashes and yes they can be cross referenced to the shop manual.

As a side note….Lifetime and Supporting members generally have access to digital versions of the various models shop manuals. I can’t say they are all there but it seems most of them are.

 

[tjoreo]

Can't speak for the your 700 exactly but I was able to take the driver seat belt apart on my 1000 and remove a little magnet u shaped piece in there that would allow it to not have the seatbelt done up. I don't know exactly if yours has it, if you aren't seeing any wires from the seatbelt, but it might be worth looking at. I also know that the my '15 700 would shift from 1st to 2nd at 12 mph so maybe it has something to do with the shifting vs the seat belt. Hope you can get it figured out.

 

[tjoreo]

Here some info on the piece I removed. Looks like 2017 and later models had the seatbelt feature.

P500 - 2017 seatbelt safety disable

Ok.. so I hated that every time I jumped in the pioneer to run from the house to garage or around the farm, the unhooked seatbelt would auto engage the 14mph speed limit feature. That's dumb!!! So tonight I disconnected it.. all you need is a T10 torx. First.. unscrew all four T10 torx...

hondasxs.com

 

[tjoreo]

Finally went back and reread your situation and see you didn't have seatbelts to take this piece out. Here is a link to the seatbelt by pass kit from the forum store. There is also a video of its installation that might shed a little light on where it needs to go. Once again hopefully you can figure it out.

Harness accessory seat belt override bypass kit - Honda PIONEER 1000 & 700

Used when installing an aftermarket safety harness. This unit bypasses the standard seatbelt limiter that no longer functions correctly with a harness installation. Use of this kit requires safety harnesses to be installed. Simple plug-and-play leave the OEM system intact allowing easy reversal...

store.hondasxs.com

 

[Hondasxs]

I am here to confirm the 700 is not showing a seat belt limiter until 2017.

HOWEVER.... Being used, that does not rule out someone installed a 2017+ ECU into your machine.
This would cause this very issue with no continued flashing light

How to check this...
The ECU will have a part number on it.
Post it for review.

Ex...
HL3-A42
HL3-602
HL3-G02

 

[brad bevins]

The ECU has an HL3-A42 part number on it.

What can we learn from that?

 

[Robobrainiac]

I am here to confirm the 700 is not showing a seat belt limiter until 2017.

HOWEVER.... Being used, that does not rule out someone installed a 2017+ ECU into your machine.
This would cause this very issue with no continued flashing light

How to check this...
The ECU will have a part number on it.
Post it for review.

Ex...
HL3-A42
HL3-602
HL3-G02

The ECU has an HL3-A42 part number on it.

What can we learn from that?

Just combining the two posts so @Hondasxs can see an alert for your question.

 

[Robobrainiac]

If you ever want to respond to another member in the threads just click reply.

If you ever want to get someone's attention place an @ symbol in front of their forum handle name.

@brad bevins

If you do not do that then the other member may never get an alert that you wanted to speak with them.

 

[Hondasxs]

Thanks @Robobrainiac


@brad bevins
I have no additional info or answers.
The part # 38770-HL3-A42 matches a 2015 unit.
Which should not have the seatbelt speed limiter.
I was really hoping that was the case as I have seen that before and had an easy fix.

 

[brad bevins]

Yesterday I purchased a new ECU HL3-A42 from the local Honda dealer. They expect to receive it by Friday. Once I get it and install it, I will provide feedback. I'm keeping my fingers crossed.