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BMS VW GTI JB4 info thread

2.0T-GTI

VW in MadTown
Location
Midwest
Car(s)
2019 Rabbit Ed. GTI
Share a pic of your install. Mine bt dongle is facing towards the cabin and i never have issues. Mine is literally velcroed to the battery.



Same here. Mine connects great consistently. Good luck!


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JeffGTI1

Passed Driver's Ed
Location
Orlando, FL
Hello everyone

I just installed a used jb4 today on my mk7.5
Got it with the bluetooth for s good price.

So for my understanding theres map 1 and map 2 for stock engines,
Map 3 is for meth and map 6 is for custom.

So maps 4 and 5 arent used?

For the price I paid I'm glad I threw this in. Makes it lil more fun.

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ZuMBLe

Autocross Champion
Location
NY
Car(s)
Alltrack 6MT
Hello everyone

I just installed a used jb4 today on my mk7.5
Got it with the bluetooth for s good price.

So for my understanding theres map 1 and map 2 for stock engines,
Map 3 is for meth and map 6 is for custom.

So maps 4 and 5 arent used?

For the price I paid I'm glad I threw this in. Makes it lil more fun.

Sent from my SM-N950U using Tapatalk
Map 4 is the valet mode map if you have the latest firmware.
 

NeedSleep

Go Kart Champion
Location
USA
Car(s)
2016 Golf R DSG
Hello everyone

I just installed a used jb4 today on my mk7.5
Got it with the bluetooth for s good price.

So for my understanding theres map 1 and map 2 for stock engines,
Map 3 is for meth and map 6 is for custom.

So maps 4 and 5 arent used?

For the price I paid I'm glad I threw this in. Makes it lil more fun.

Sent from my SM-N950U using Tapatalk

Good thing I bookmarked the following (post #5439) in the logging thread:

Guys there are a few maps on the JB4 that we have kept silent up till now. Worth it for guys with aggressive settings to test them out first and put up some logs.

Map 3 is a map 2+ map with absolute values. Typically will boost 24psi with a taper to around 20.
Map 5 is a aggressive map to be used with E85 mix or race fuel on full bolt on cars.
Map 8 is the methanol map. The boost additive value is what gets added across the rpm range where 10=1psi, 40 is the starting recommended point for this and the boost will be added in proportion of meth flow. i.e no flow no boost add.

These maps are on all firmware later than 60/1/5

I believe version 60/7//5, uploaded around October 2018 and what I currently run, is when map 4 became valet mode (cutting boost in half).

Map 1, 2, and 6 were unchanged from the first post of the thread.

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pdisguise

Go Kart Newbie
Location
USA
Valet mode? Quit the fancy restaurants and buy an RS car with the money.Hahahah
 

Quantim0

Passed Driver's Ed
Location
Winter Park, Fl
Car(s)
16 GTI and S3
I've been getting an intermittent P0100 the last two days. I haven't messed with the car recently, possibly plug D is loose or is the maf the plug on the manifold?


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GTI210

Ready to race!
Location
TX
I know this has been asked a million times...but what's the proper procedure for removing the JB4 again? Put the car in sleep mode before removing the plugs, right?
 

NeedSleep

Go Kart Champion
Location
USA
Car(s)
2016 Golf R DSG
I know this has been asked a million times...but what's the proper procedure for removing the JB4 again? Put the car in sleep mode before removing the plugs, right?
Yup, just like the install process

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GTI210

Ready to race!
Location
TX
So what the hell are you supposed to do when you break a tab? Everyone has trouble with plug D but I've been fighting with plug C for like 15 mins, and just broke the little tab. It's still in there snug and I'm assuming no way for me to pull it out since that tab is part of the locking/unlocking mechanism.




Having a service done at the dealership tomorrow smh.
 
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NeedSleep

Go Kart Champion
Location
USA
Car(s)
2016 Golf R DSG
So what the hell are you supposed to do when you break a tab? Everyone has trouble with plug D but I've been fighting with plug C for like 15 mins, and just broke the little tab. It's still in there snug and I'm assuming no way for me to pull it out since that tab is part of the locking/unlocking mechanism.




Have a service done at the dealership tomorrow smh.
If you have a small flathead screwdriver, you can put it in the slot on the left side to lift the lever/lock inside. Think of this: when pressing the tab that you broke, it was lifting said lever. Now that tab is gone, you have to lift the lever from the other side.

Do this while pulling the plug towards the right.

I found most success with a mini screwdriver intended for my glasses.

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