Code 37 after +6000kms of MX


wwmotors

Well-known member
Location
Bavaria Germany
Yesterday i got my first code or problem on my 2018 MXR (code 37) after +6000 MX kms. Strange: The bike was standing dry for weeks, never got washed the last weeks, because in the MX hall it is not really dirt sticking to the bike. Then after 2 weeks of storing in the house at 10-15 degrees Celsius, I did 6 stints with 10 minutes in the MX hall. Drove the bike home in the closed van. When riding the bike slowly into my house, the code came up!
My explanation: The humidity was already there. When the bike cooled down in the back of the van to nearly 0 degrees Celsius, the relative humidity went up over the critical barrier. Is there any tutorial from other guys here, how to change the desiccant pack (descrition, pistures , Youtube video etc...) ?
First i will check data with MT and keep You posted, what the datas say.
Cheers
 

Rashid510

Well-known member
Forum's Sponsor
@wwmotors - you can change out the desiccant pack that will partially help. But based on the reading the humidity value is within spec...The humidity sensor can be thrown off pretty easily. You may want to clear the code with MT and see if it continues.
 

wwmotors

Well-known member
Location
Bavaria Germany
@wwmotors - you can change out the desiccant pack that will partially help. But based on the reading the humidity value is within spec...The humidity sensor can be thrown off pretty easily. You may want to clear the code with MT and see if it continues.
Ok, i already deleted the code. I will report, when it shows up again! I try to change the desiccant pack. Thanks and Cheers
 

wwmotors

Well-known member
Location
Bavaria Germany
So to clear, what happened to my battery with the code 37, i removed the battery frame in 5 minutes. For that i layed the bike down to the side. Then i warmed up the battery around the seal of the bottom cover. 30-40 degree celsius where enough to soften the sealing. I removed the cover easlily with a screwdriver and then it fell off after warming up all the way around. Inside the bottom cover is a airbag which cares for pressure equalization, without getting humidity in! A very good idea, to do this that way! The airbag is connected to the outside air. So be careful not to hurt it. Under the airbag You will find the decassent bag. In my case it was already broken from shaking around during 6500 MX kms of hard MX! So i cleaned up everything, also removed the rest of the seal as clean as possible and fitted everthing together. Cleared the code with MT. Bike is running like new!
P.S: I was curious about my cells, so i opened the orange cover and checked the cells and wirebonds (Careful HIGH VOLTAGE!) But also there everything looked perfectly dry! So here we go for the next 6500kms!

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wwmotors

Well-known member
Location
Bavaria Germany
A blown dessicant pack...yay. Were you able to clean out the dessicant from the butyl? And did you apply fresh butyl?
Yes i cleaned it with a small screwdriver and a knife. i bought butylstring 4mm. Worked out pretty good. STRANGE: I have a EXR with 2000 km odo. Yesterday i got also code 37!!! Exact same situation: i went 5 stints with 12 minutes in the cartinghall at 10 degree C. Then i went home. Next day unloading the bike at 0 degrees! Code37!!!
UPDATE: Today i checked with Multitool both bikes: They had exactly the same humidity of 49%! I have no idea, why i got the same humidity warning on 2 bikes!?!
 

TCMB371

The Silent Assassin
Forum's Sponsor
Location
Temecula, CA
Code 37 is triggered when the humidity sensor reads >70% for over 60 continuous seconds. Check your log (will need to download it from the bike) and see if that had occurred.
 

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