• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

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TE630 don't start / defaut code

R

roamine

Husqvarna
A Class
Hello All,
First issue with my TE 630! 10000km.
All was fine every day, and this morning, starter and cranking is good and powerful but the engine won't start even if close...
Spark OK
Spark very wet so gas incoming OK
Battery fully charged
TPS reset
Explosion in the exhaust if I maintain too long the starter.
I am going to disconect the JDtuner to be sure this is not the guilty.
No under rain riding/No recent washing so I don't understand why this issue, from one day to the next.

Basically the engine is very close to fire but nothing.
Hopefully to guide a bit, I got 3 fault codes but I cannot explain which system is problematic according to this...
Here is a video to better explain the starting issue and the code on Ibeat.

View: https://www.youtube.com/watch?v=NmCC34DhEuk




Any fault code expert ?! Feedback on the same issue?

thank you
 
I would guess thats a faulty M.A.Q.S sensor. It's the sensor on the throttle body, it measures the air pressure and temperature and the throttle position. Or simply the connector of that sensor is bad.
 
Caboose said:
I would guess thats a faulty M.A.Q.S sensor. It's the sensor on the throttle body, it measures the air pressure and temperature and the throttle position. Or simply the connector of that sensor is bad.
Click to expand...

Thank you, I actually focus gradually in that direction, Manifold air pressure seems to be the only value which not varies in Ibeat => 96.4 since the problem, at every Ibeat connection.
Today issue is that I can't remove the MAQS sensor (CPS, TPS MAQS etc I am a bit lost with this definitions), screws are like torx with a pin in the middle, weird. Hope I can find the aftermarket MAQS Part number or equivalent...
 
roamine said:
Thank you, I actually focus gradually in that direction, Manifold air pressure seems to be the only value which not varies in Ibeat => 96.4 since the problem, at every Ibeat connection.
Today issue is that I can't remove the MAQS sensor (CPS, TPS MAQS etc I am a bit lost with this definitions), screws are like torx with a pin in the middle, weird. Hope I can find the aftermarket MAQS Part number or equivalent...
Click to expand...
Those are security Torx screws, supposed to be tamper proof. You can buy bits or keys everywhere.
 
Had similar issues with my bike, replaced M.A.Q.S. but issue still there. Disassembled the connector itself to find that the connector was full of water. Completely dry n the outside as all the seals did a great job holding the water in. Dried it out and reassembled it packed full of dielectric grease.
 
mekanik said:
Had similar issues with my bike, replaced M.A.Q.S. but issue still there. Disassembled the connector itself to find that the connector was full of water. Completely dry n the outside as all the seals did a great job holding the water in. Dried it out and reassembled it packed full of dielectric grease.
Click to expand...

Good to know !
Do you mean the white 5 pins connector under the MAQS?
 
Yes it's the white connector on the left side. If you look at it closely you'll see that it's actually up-side down, so water can flow into it and mess things up.

Funny thing is I removed that sensor a few years ago and I didn't realize that it's security torx. But that means my torx bit set is good for those. :D

M.A.Q.S means Modularized Air Quantity Sensor so it measures the air volume that enters the engine plus the throttle (butterfly valve) postition.

Edit: Btw Yamaha YBR125 and YZF125R seems to have very similar sensors. Might work if it needs to be changed.
 
I have removed the white connector and all is dry, even with WD40, same issue. Before ordering a new TPS I will check all the harness to be sure no short circuit or chaffing and of course check the TPS itself. Only the Manifold pressure is frozen on Ibeat.

For YBR some people say the current in reversed, fake? maybe they did not calibrate the new TPS I don't know. But this is my only solution, TB is sold in one part, 800$)
 
kirbybikes said:
Good info here! Scroll down into the comments and he confirms it does indeed fit from the Yamaha YZF 125R with a recalibration from Ibeat.
Click to expand...


I would like once and for all to clarify the compatibility of the yamaha 125 cc spare part. For this I put a photo of my MASQ of my TE taken from the connector part and of the one sold as a spare part for yamaha on ebay .. For me they are IDENTICALfoto 1_vtgma_usato.jpgIl mio MAQS2 VTGMA.jpg

The opinion is yours
 
Make sure that the wiring of the white connector isn’t damaged the whole way through.
I’ve had to change part or the wiring cause it was gone bad because of the water infiltration.
If you put another sensor on, check if it isn’t in reverse order by opening the gas throttle.
I bought a lot of ‘replacement’ sensors but they were all in reverse.
Good luck!
 
Good news, before checking ellectrically the MAQS I change the spark by a new one (even if I see sparks) and it starts finally !!

Weird to have this 3 fault codes just for a spark but anyway, problem is solved :)
 
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