Check engine light after changing to new bars.

[pvt93]

I changed out my stock bars on my new 2019 TG and now I have a check engine light on. I rechecked all the wires I unplugged and plugged them all back in again. Everything works fine except for the light on the dash. Any suggestions??.

 

[Jack Klarich]

You will have to scan for DTC here

https://www.triketalk.com/forum/threads/55107-How-to-scan-19-20-Harley-DTC-thru-radio-display

Then record the code and report back

 

[Jack Klarich]

Here https://www.triketalk.com/forum/threads/55081-2019-Harley-Trouble-Code-List?p=698498#post698498 is a list of trouble codes

 

[pvt93]

No DTC codes logged is what it says.

 

[Jack Klarich]

No DTC codes logged is what it says.

The light should not be on if you have NO codes

 

[pvt93]

That's what it says, I even tried to up a picture, but that's not working. I'm lost.

 

[Jack Klarich]

That's what it says, I even tried to up a picture, but that's not working. I'm lost.

Me too, as I have never seen a check engine light on with no stored codes

You say everything else is working correctly? The engine starts and runs OK?

 

[pvt93]

I took it for a short ride up and down my street and as far as I can tell it works just like it did before. All switches work, lights, radio, and other things seem in order except for the check engine light. I've checked the DTC codes several times and no codes noted. ??

 

[Jack Klarich]

I took it for a short ride up and down my street and as far as I can tell it works just like it did before. All switches work, lights, radio, and other things seem in order except for the check engine light. I've checked the DTC codes several times and no codes noted. ??

Very strange, I hate to say it but you may have to have your dealer hook it up to the digital technician scanner

I am surprised to see NO codes displayed, these newer can bus systems are tricky, tho it would NOT surprise me to see some sort of hidden problem on your trike not being picked up by the on board diagnostics

Good Luck and let us know what you find

Welcome to Trike Talk

 

[pvt93]

Thanks for the ideas anyway. Looks like a trip to the shop for me. I don't even have 250 miles on it yet.

 

[Jack Klarich]

Thanks for the ideas anyway. Looks like a trip to the shop for me. I don't even have 250 miles on it yet.

Just for grins, un plug your neutral light switch after starting your bike. Shut it off and scan for codes. I am curious if it picks this up

Do your brake lights and cruise control work?

 

[pvt93]

How do I do that? Not sure which is the neutral light switch. The brake lights did work, haven't checked the cruise control.

 

[Jack Klarich]

How do I do that? Not sure which is the neutral light switch. The brake lights did work, haven't checked the cruise control.

RS of the bike in front of the starter you see a switch with 2 wires

By removing 1 of the wires with engine running we are trying to set a code to see if in fact your on board diagnostics works and you can clear a code

# 10 here

 

[pvt93]

I started the bike, it showed the neutral light on. Pulled the black wire with it running and the neutral went out. Shut off the bike and open up the DTC and it shows no codes. Tried to start the bike without using clutch and brakes and no start. Put the wire back on, the light lit and was able to start the bike. Pulled both wires with it running and shut it off and looked at the DTC again and no code.

I also went back out earlier and the cruise control works great.

So it appears that it's not registering codes on the DTC.

 

[Jack Klarich]

I started the bike, it showed the neutral light on. Pulled the black wire with it running and the neutral went out. Shut off the bike and open up the DTC and it shows no codes. Tried to start the bike without using clutch and brakes and no start. Put the wire back on, the light lit and was able to start the bike. Pulled both wires with it running and shut it off and looked at the DTC again and no code.

I also went back out earlier and the cruise control works great.

So it appears that it's not registering codes on the DTC.

Very interesting, You might want your dealer to take a look at this

 

[Koolbreeze]

Did you pull the main fuse prior to changing the handle bars? Might want to turn the bike on and put it in the accessory position, then pull the main fuse and then turn the switch to off. Wait 10 min, then plug the main fuse back in and see if the engine light come back on. If it does it is time for a trip to the dealer I expect as it is under warranty.

 

[pvt93]

Did you pull the main fuse prior to changing the handle bars? Might want to turn the bike on and put it in the accessory position, then pull the main fuse and then turn the switch to off. Wait 10 min, then plug the main fuse back in and see if the engine light come back on. If it does it is time for a trip to the dealer I expect as it is under warranty.

I did as above and it didn't make a difference. Started the bike and still had the service engine light. Let it run a bit then shut it off. Tried the DTC again and it finally has a code of U000100. Reset the code and started the engine and still have the check engine light.

 

[Jack Klarich]

I did as above and it didn't make a difference. Started the bike and still had the service engine light. Let it run a bit then shut it off. Tried the DTC again and it finally has a code of U000100. Reset the code and started the engine and still have the check engine light.

UO100 is a loss of communication with ECM, very strange code if it starts and runs

Just for grins test your battery voltage, check and make sure battery connections are tight. Check the connections @ the ECM to be sure they are plugged in all the way, I would not be surprised this could have been missed @ the factory

 

[pvt93]

I took the bike to the shop today and there was 10 codes in the computer and all were historic. They simply reset the system with the computer and all is well. The tech said that I had started it with something disconnected and that was the reason for the check engine light and needed the computer to reset it. I did start the bike with the headlight disconnected, so it was something that I did. I'll know not to do that again.

 

[Jack Klarich]

I took the bike to the shop today and there was 10 codes in the computer and all were historic. They simply reset the system with the computer and all is well. The tech said that I had started it with something disconnected and that was the reason for the check engine light and needed the computer to reset it. I did start the bike with the headlight disconnected, so it was something that I did. I'll know not to do that again.

Good on you for getting this resolved

I am still curious why you could not get the codes to read out on your display?

Did the tech answer this?

 

[pvt93]

The tech got the codes through the trip meter instead of the boom box. So, I didn't ask him why the difference.

 

[Jack Klarich]

The tech got the codes through the trip meter instead of the boom box. So, I didn't ask him why the difference.

I dunno if the scan works the same on your Triglide as mine, try holding down trigger switch on LS switch pak then turn ignition to on position. Your speedo gauge should sweep then go to scan for DTC

Look here

 

[pvt93]

I dunno if the scan works the same on your Triglide as mine, try holding down trigger switch on LS switch pak then turn ignition to on position. Your speedo gauge should sweep then go to scan for DTC

Look here

This is how the tech got the 10 different historical codes. He reset everything and it's working great now.

 

[Jack Klarich]

This is how the tech got the 10 different historical codes. He reset everything and it's working great now.

Good deal, I was not sure if this scan would work on your Triglide with the info screen

 

[ultrafxr]

The tech got the codes through the trip meter instead of the boom box. So, I didn't ask him why the difference.

Did something change on the 2019 with the BoomBox GTS that enables you to get the DTCs from the BoomBox? I am unaware of any such change and as far as I know the procedure Jack referenced using the trip meter button is how to get to the DTCs. I think there is a diagnostic specific to just the BoomBox itself which can have it own codes but these are different from the codes that will illuminate the check engine light.