[mindau88]

I got very similar problem but my codes are in German so I got no idea what they mean
Engine
P0557
U1120
U110C
U1118
U1126
U116D
U1103
P0503
P0500

JBB
A6CA
C918
A6C9
C804

FRM
E594
932C

[Tonethejackal]

I had airbag light too. Bad alternator diode was likely allowing ac voltage into the can system screwing things up. Alternator was also was causing 3 amp parasitic draw killing battery.

[mweisdorfer]

Originally Posted by luxe91

Hi Everyone. I'm a new member.

After reading a lot of forum posts and searching I need to ask for help from the experts here.

The car is a 2006 320d Touring (build 12/2006), European model.

In a nutshell the current problem with my car is that the windshield wipers cannot be controlled (always on!!!), the turn signals do not cancel automatically, the Traction Control and Brake lights are lit up on the dash (yellow) and I get a tire pressure warning. I think the issue really is the JBE (junction box electronics) which is not a common culprit.

I was able to drive the car on a limited basis with the wiper relay pulled, but now the car is effectively out of use.

Slowly the problem has evolved as follows over the past year:

- Tire Pressure warning light coming on and off (started after swapping between winter and summer wheels, OEM sizes)
- DSC light coming on and off (was able to reset with INPA and went away for a while)
- DSC light becoming sensitive to (car cabin-assumed) temperature (dash lights off when car was parked outside in the cold, then came back on after few minutes of driving)
- Wipers would start running by themselves, no control over them. Initailly problem went away by cycling the ignition a couple times. (After that I had to start pulling out the relay to maintain my sanity)
- NOW: wipers are always on, DSC light always on, brake light yellow always, turn signals don't cancel.

These are the current codes being returned. Particularly interesting are the codes for DSC and JBE/JBBF.


DSC:

D373 D373 - F-CAN SWA-Top-Sensor data 200 or 201 is missing
5E3F 5E3F - F-CAN SZL coding error.
5E51 5E51 - F-CAN SZL serial number invalid.
D34B D34B - F-CAN-Bus Off.
D370 D370 - F-CAN Sensorcluster_1 data 205 is missing
D371 D371 - F-CAN Sensorcluster_2 data 209 is missing
D372 D372 - F-CAN Sensorcluster_3 data 212 is missing
9520 9520 - steering wheel MFL: mechanical faulty, contact.

JBBF:

A6CA WISCHER_STUFE_1_RELAIS
C918 PT_CAN_ID2A6_BEDIENUNG_WISCHER_TIMEOUT
C918 PT_CAN_ID2A6_BEDIENUNG_WISCHER_TIMEOUT
A6E4 SENSOR_TANK_LINKS
A6E5 SENSOR_TANK_RECHTS
A6D1 ZUSATZWASSERPUMPE


I know a lot of the above can tie back to the usual DSC/SZL/tri-fecta of lights issues these car have, however I don't think the codes are exactly tying back to the common items such as:

1) Wheel sensors - Mine are all reading correctly and report the same rotation speed via INPA. I have inspected and cleaned all 4. A couple had some minor scraping on the surface. Did not inspect ABS rings.
2) ABS Pump - Have not done anything, as I don't see a specific code for this.
3) ABS Pump Electronic module - Have not gone for a rebuild yet, as have not 100% confirmed that this is the cause. The temperature sensitivity of failing units reported by others is interesting.
4) Steering wheel SZL/Disk/Board - Found no residue on the encoder disk. Cleaned anyway. Also reflowed most solder joints on the circuit board. No difference.
5) Battery is in good condition, there is no IBS sensor on the negative terminal, but a small connector on the positive side is correctly plugged in.
6) Alignment appears correct but has not been redone.
7) JBE - inspected and tried to reflow with heat gun. No difference.

Car is fully stock except for a wiring harness for the radio to plug in a PnP audio amplifier. This required relocating the Fiber optic Most cable to the new radio plug.


This all brings me to the JBE which I suspect is the issue because of the following:

1. My error codes don't matchup exactly to anyone else who had the classic DSC/SZL issue. The closest was a guy in Sweden who had 4 of my SZL communication errors and fixed it by reflowing solder joints on the SZL board.
2. The JBE is a pass thru for F-CAN communications between the SZL and DSC, as well as has circuitry for windshield wipers
3. Looks like the JBE was replaced sometime in 2011 under previous owner (verified via INPA and part number date of JBE) so is a potential culprit again
4. The very few cases I have found of wipers running out of control are people who were doing something with the JBE

Would welcome any thoughts on any of the above.

My next steps are to buy a used JBE to replace what I have. This is my intuition and the JBE is the least expensive part vs the other possible culprits.


Q: Does the replacement JBE need to have a later manufacture date than the build of my car?

Q: What are the steps/tools to code the JBE to my car once I install it? I have NSC Expert, EDIBAS, INPA etc. Cannot find any instructions for how exactly to do this.


If this is indeed the JBE, then I can look forward to the next round of DSC related failures (at least these were well documented) )

Thanks for reading and again would welcome any help.

How's your battery ?!

[2fast4]

Originally Posted by mweisdorfer

How's your battery ?!

I have the same problem. ABS/DCS/brake lights and cogwheel icon.
I recently replaced battery with Walmart AGM type. About 2 weeks ago.
Coded and registered.
What is the fix?

[mweisdorfer]

Originally Posted by 2fast4

I have the same problem. ABS/DCS/brake lights and cogwheel icon.
I recently replaced battery with Walmart AGM type. About 2 weeks ago.
Coded and registered.
What is the fix?

How many miles?

Most importantly, what codes are you getting?

[Swamp Fox]

I just finished changing the coolant on my 2013 E93 335is. Now the windshield wipers will not turn off. The only thing electronic I touched was to remove the fan so I could drop the intercooler to gain access to the coolant radiator drain plug. I put everything back together and now the windshield wipers will not turn off. I have not driven it yet so I do not know if there are other problems but....What could cause this?

[Swamp Fox]

I think the problem was the battery is getting old after 7 years and after sitting over the weekend the voltage was too low and caused almost every system to show a warning (including the windshield wipers that defaulted to on). I charged the battery and cleared all the codes with ISTA and the car is working. Now I see a new battery in my future.

[Jonjabu08]

Good evening all
I am having similar issues but different codes
It all started after I bought it, I had intermittent lights in the dash (abs, handbrake airbag and tyre warning light)
Also the wipers would switch to intermittent blower motor stops, windows stop working, radio turned off and indicators would not auto cancel.
After reading up I thought it might be either water in the electrics under the bonnet or abs module/ pump.
Had a mechanic who apparently knows BMW’s well plug it in who basically said it could be any anything but he couldn’t talk to the DSC module.
Useless!
Anyway I’ve decided to go it on my own and investigate.
So I’ve got INPA and searched stores codes and this is what I have.
00 JJBF 4 errors
A6D1 61
C910 64
C914. 64
C90B. 61
01 MRS. 1 error
93FB. E4
12 DME/DDE. 14 errors
4C13. 68
4C23. 68
4C28. 68
49F3. 68
43F1. 72
4C03. 68
4992. 64
3F62. 74
4BF3. 68
4212. 24
4232. 24
4222. 24
4242. 24
4B90. 11
40 CAS 2 errors
A118. 20
A0B5. 61
50 SINE 1 error
9D12. 11
60 KOMBI 3 errors
A3AC. 60
A3B9. 60
A550. 60
72 FRM 2 errors
9CAC. 21
9CCF. 64

after resetting and not driving these have straightaway come back.

00 JJBF
A6D1. 61
01 MRS
93FB. E4
12 DME/DDE
4C13. 48
4C23. 48
4C28. 48
49F3. 48
4C03. 48
4992. 44
4BF3. 48
60 KOBI
A3AC. 60
A3B9. 60
A550. 60

I have also fitted a new battery to eliminate this first

When I bought it was sent to have the recall of the blower motor wire replaced ?
Could this play a part !

Any help or advise would be greatly received .

Thanks

[DBeum]

Hello! Sorry to resurrect an old thread. I’m dealing with wipers always on on a 2006 325xi wagon. No issues before this. The only issue alongside it is a window icon in the cluster. Relay was super hot with burnt contacts. Putting a new one in, the issue remains. Battery was tested and tests good. I don’t have access to a scan tool but my first thought was the JBE possibly. I’ll look into the other recommendations here as well. Any help would be appreciated!

[luxe91]

Originally Posted by DBeum

Hello! Sorry to resurrect an old thread. I’m dealing with wipers always on on a 2006 325xi wagon. No issues before this. The only issue alongside it is a window icon in the cluster. Relay was super hot with burnt contacts. Putting a new one in, the issue remains. Battery was tested and tests good. I don’t have access to a scan tool but my first thought was the JBE possibly. I’ll look into the other recommendations here as well. Any help would be appreciated!

I would suggest you get an inexpensive OBD scanner and use an app like Carly or Torque to see what codes are present. I believe the window icon means that a relearn is required.

Have you checked that your interior is perfectly dry - carpets, behind dash etc.?

[DBeum]

Originally Posted by luxe91

I would suggest you get an inexpensive OBD scanner and use an app like Carly or Torque to see what codes are present. I believe the window icon means that a relearn is required.

Have you checked that your interior is perfectly dry - carpets, behind dash etc.?

I haven’t checked that. The carpets appear dry to me but I’ll look. If they are wet, I fix the leak, what’s most probable leak point, and/or corroded connections?

[luxe91]

Spots to check for water - Lateral acceleration sensor under the drivers seat and CAN bus wiring junction near the drivers foot rest (on a LHD car).

In your case codes are very important to have. There are many different causes for the wipers running out of control as it is all tied together to the DSC Unit / Steering SZL / Lateral Sensor / JBBF modules which communicate over CAN. Any continuity or resistance issues will cause the problem.

I would approach this issue by reviewing what changes were made to the car recently if any, pulling codes, verifying wiring and CAN resistance between each end point. I've attached a diagram but you can probably find something better online.

[boothunter11]

Old thread but may help someone, if you dsc is disconnected your windscreen wipers will be continually on. So possible bad dsc connection if its plugged in

[luxe91]

Originally Posted by boothunter11

Old thread but may help someone, if you dsc is disconnected your windscreen wipers will be continually on. So possible bad dsc connection if its plugged in

There can be many different reasons for the wipers running. Wiring issues or CAN BUS resistor failures are possible. What is happening in your case? Do you have specific error codes?

[boothunter11]

Originally Posted by luxe91

There can be many different reasons for the wipers running. Wiring issues or CAN BUS resistor failures are possible. What is happening in your case? Do you have specific error codes?

I had it unplugged for a brake job

[Handyrandy23]

Same issue. Pulled relay and replaced it solved issue.

[mm899]

Originally Posted by Handyrandy23

Same issue. Pulled relay and replaced it solved issue.

did you have to the wipers going on non stop as well? did you have the trifecta lights ABS, traction control, brake lights on too or just the wipers?

[Luper52]

Just wanted to add I was getting all of these symptoms when installing my CarPlay android head unit. Only when I would disconnect my LVDS cable or Screen Cable from the CIC. (Yes the battery should have been disconnected)

But I believe my issue to have either been frayed wires on the LVDS plug, shorting out, or my JBBF module had gone bad. Like I say, it only happened when installing the head unit, and when plugged back in like OEM it worked like normal.

Wish I had a more definite answer than "one of two things" but honestly it's good practice to re-insulate any frayed or exposed wires anyways, so try re-insulation and then if the problem still exists, replace JBBF!

[jacojaco]

hello guys, I've got a 08 328i with similar electrical issues. wiper always on, abs, airbag, traction control, and break light on (in yellow), radio shuts off. this all seems to appear when you accelerate or even rev the car in neutral. when off the gas everything appears normal again. any ideas for this case. much appreciated

[Luper52]

Originally Posted by jacojaco

hello guys, I've got a 08 328i with similar electrical issues. wiper always on, abs, airbag, traction control, and break light on (in yellow), radio shuts off. this all seems to appear when you accelerate or even rev the car in neutral. when off the gas everything appears normal again. any ideas for this case. much appreciated

Scan your car for codes. It sounds like at the very least you have a bad JBBE. Could be another reason though on top of that why your car seems to be surging. Intelligent Battery Sensor controls voltages to each module so perhaps that's gone bad too.