M4 Service and Open Campaign - Can Terminator (Service Bulletin

Gac101177 · 10-07-2014, 01:14 PM

Hello Thanks to forum member RobRed i was able to get my SIB done in case anyone miss it here

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DocWeatherington · 10-07-2014, 04:46 PM

What exactly is this for?

redfox · 10-07-2014, 05:01 PM

silent "recall". This is one of them. There are two right now.

EDIT: as pointed out by another forum member. This is not a full on recall. My understanding of a silent recall is one where the customers do not have to be made aware of the situation. The dealership quietly fixes it the next time vehicle is in for service. That usually means the issue is nothing major. I wanted to clarify this point.

SakhirM4 · 10-07-2014, 05:03 PM

Quote:

Originally Posted by redfox

silent recall. This is one of them. There are two right now.

It is not a recall. It is a service bulletin. There is a big difference.

MoxieMoxie · 10-07-2014, 05:08 PM

I don't know what it is but I want my can terminated now. Thanks.

DocWeatherington · 10-07-2014, 05:13 PM

Quote:

Originally Posted by redfox

silent recall. This is one of them. There are two right now.

What's the other?

redfox · 10-07-2014, 05:26 PM

Quote:

Originally Posted by DocWeatherington

What's the other?

Water drainage - apparently applying sealant to an area that could leak.

DocWeatherington · 10-07-2014, 06:32 PM

Quote:

Originally Posted by redfox

Water drainage - apparently applying sealant to an area that could leak.

Side note, any decent tint shops in Toronto?

NorCal f80 · 10-07-2014, 07:27 PM

WTF is a Can Terminator?

DocWeatherington · 10-07-2014, 07:31 PM

Quote:

Originally Posted by dwin_sd

WTF is a Can Terminator?

I THINK IT HAS MADE IN GERMANY on it somewhere.

Gac101177 · 10-07-2014, 07:38 PM

Quote:

Originally Posted by DocWeatherington

Quote:

Originally Posted by dwin_sd

WTF is a Can Terminator?

I THINK IT HAS MADE IN GERMANY on it somewhere.

huatian · 10-07-2014, 08:31 PM

CAN bus, or Controller area network. It's a protocol used mainly in the automotive industry and audio. It's used for control boards and systems to communicate. It's a linear bus topology and needs to be terminated to work correctly. Lack of proper terminal in a linear bus can lead to all sorts of errors. But, I'm sure there are more then one CAN bus within M4, and I'm sure it's not a critical one, however, all CAN buses need to be properly terminated.

Not a bad write up on CAN bus protocol for those interested. http://en.wikipedia.org/wiki/CAN_bus

Since it says retrofit resister, that means either the value is off a bit leading to internal reflections on the bus, or the value of the resister isn't up to spec in tolerance maybe a 5% resister was used instead of 1% or, maybe the resistor wasn't automotive grade quality. Most circuitry in an automobile has a tolerance of -40C to 250C. My gut tells me it's along those lines hence the retro fit.

But being a BMW, this resister isn't a simple ceramic, it's most likely SMD (surface mount and you can't be just replaced) hence in reality, they'll yank the board that part of the termination and replace it (probably a 100.00 board for a .5 cent resister). Now some CAN buses are terminated with a simple RJ45 terminated internally and used for this purpose, really depends on how it's done. I have my money on a simple little board swap (BMW isn't going to use RJ45 connectors for CAN bus termination - that's for little shops with no money)

wg8221 · 10-07-2014, 08:45 PM

Quote:

Originally Posted by huatian

CAN bus, or Controller area network. It's a protocol used mainly in the automotive industry and audio. It's used for control boards and systems to communicate. It's a linear bus topology and needs to be terminated to work correctly. Lack of proper terminal in a linear bus can lead to all sorts of errors. But, I'm sure there are more then one CAN bus within M4, and I'm sure it's not a critical one, however, all CAN buses need to be properly terminated.

Not a bad write up on CAN bus protocol for those interested. http://en.wikipedia.org/wiki/CAN_bus

Since it says retrofit resister, that means either the value is off a bit leading to internal reflections on the bus, or the value of the resister isn't up to spec in tolerance maybe a 5% resister was used instead of 1% or, maybe the resistor wasn't automotive grade quality. Most circuitry in an automobile has a tolerance of -40C to 250C. My gut tells me it's along those lines hence the retro fit

Right after these two service bulletins were done (1200 mile Svc) I got the Drivetrain Malfunction indication which I outlined in the Drivetrain Malfunction Thread that has put my M4 out of service from Sept 29 until the parts arrive from Germany on 15 Oct at the earliest.

I hope this is a coincidence but thought I'd share my experience.

huatian · 10-07-2014, 08:51 PM

Quote:

Originally Posted by wg8221

Right after these two service bulletins were done (1200 mile Svc) I got the Drivetrain Malfunction indication which I outlined in the Drivetrain Malfunction Thread that has put my M4 out of service from Sept 29 until the parts arrive from Germany on 15 Oct at the earliest.

I hope this is a coincidence but thought I'd share my experience.

Interesting, Now the drive train system would communicate to another system of its status over a CAN bus. If somehow that protocol got messed up (say one wrong bit from 0 to a 1) it it would indicate an problem but in reality there is no problem. I'm just speculating not saying that's what happened. Point is, all communications in todays auto's use CAN bus as the primary protocol for system communication. So if you have one 1 bit out of sync and you'll get messages that are not accurate. And an improperly terminated bus (CAN, RS232, RS485, USB etc) will easily do that; SOB to track down these types of problems too from an engineering prospective.

CanAutM3 · 10-07-2014, 09:40 PM

Quote:

Originally Posted by DocWeatherington

I THINK IT HAS MADE IN GERMANY on it somewhere.

Nope. Made in Austria

JPBesl · 10-11-2014, 04:21 PM

Just went in for my break-in service and had the CAN terminator show up as a bulletin. They didn't have the part so they have to bring me back in. Might want to call to make sure they have the part if you're bringing it in for service and want to get everything in one go.

nasdaq100 · 10-13-2014, 04:23 AM

Quote:

Originally Posted by Gac101177

Hello Thanks to forum member RobRed i was able to get my SIB done in case anyone miss it here

Attachment 1102178

What is your production's date? I have read that this SIB is for March to July prod

Gac101177 · 11-27-2014, 06:14 AM

Quote:

Originally Posted by nasdaq100

Quote:

Originally Posted by Gac101177

Hello Thanks to forum member RobRed i was able to get my SIB done in case anyone miss it here

Attachment 1102178

What is your production's date? I have read that this SIB is for March to July prod

It's June

major one · 02-06-2015, 10:37 AM

i just returned from the dealer after having a 6mos check up completed. my m4 is subjected to this open campaign and will have the part replaced when it comes in. i was surprised really as the car runs beautifully and would not have known there was any issue whatsoever.

major one · 02-06-2015, 10:38 AM

sorry - april '14 build.

10-07-2014, 01:14 PM	#1
Gac101177 M4-SAHD 510 Rep 611 Posts Drives: M3 Join Date: Aug 2014 Location: Jacksonville iTrader: (0) Garage List 2015 BMW M4 [10.00]	M4 Service and Open Campaign - Can Terminator (Service Bulletin - SIB) Hello Thanks to forum member RobRed i was able to get my SIB done in case anyone miss it here
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10-07-2014, 04:46 PM	#2
DocWeatherington Brigadier General 2933 Rep 4,076 Posts Drives: F90 CP Join Date: Jul 2014 Location: US iTrader: (0) Garage List 23 Bmw M3 [10.00]	What exactly is this for?
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10-07-2014, 05:01 PM	#3
redfox INSTAGRAM: @yaasplease 166 Rep 1,023 Posts Drives: 2015 YMB M4 Join Date: Mar 2010 Location: Toronto iTrader: (4)	silent "recall". This is one of them. There are two right now. EDIT: as pointed out by another forum member. This is not a full on recall. My understanding of a silent recall is one where the customers do not have to be made aware of the situation. The dealership quietly fixes it the next time vehicle is in for service. That usually means the issue is nothing major. I wanted to clarify this point. __________________ 2015 ///M4: M/Vorsteiner Aero, P3Cars, HRE R101, Dinan S2, Coils & Intake; Eis/Akra Exhaust 2013 WRX Hatchback: LED Conversion, Blacked Out, Rally Armor 2015 Macan Turbo: Techart Exhaust, Cargraphics Lowering Module, Blacked Out Last edited by redfox; 10-07-2014 at 05:25 PM..
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10-07-2014, 05:08 PM	#5
MoxieMoxie New Member 6 Rep 26 Posts Drives: 2015 M3 Join Date: Aug 2014 Location: USA iTrader: (0)	I don't know what it is but I want my can terminated now. Thanks.
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10-07-2014, 07:27 PM	#9
NorCal f80 Lieutenant Colonel 346 Rep 1,656 Posts Drives: M3 Join Date: Apr 2014 Location: Nor Cal iTrader: (0)	WTF is a Can Terminator?
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10-07-2014, 08:31 PM	#12
huatian Second Lieutenant 73 Rep 240 Posts Drives: SS M4 Join Date: Oct 2014 Location: NJ iTrader: (0)	CAN bus, or Controller area network. It's a protocol used mainly in the automotive industry and audio. It's used for control boards and systems to communicate. It's a linear bus topology and needs to be terminated to work correctly. Lack of proper terminal in a linear bus can lead to all sorts of errors. But, I'm sure there are more then one CAN bus within M4, and I'm sure it's not a critical one, however, all CAN buses need to be properly terminated. Not a bad write up on CAN bus protocol for those interested. http://en.wikipedia.org/wiki/CAN_bus Since it says retrofit resister, that means either the value is off a bit leading to internal reflections on the bus, or the value of the resister isn't up to spec in tolerance maybe a 5% resister was used instead of 1% or, maybe the resistor wasn't automotive grade quality. Most circuitry in an automobile has a tolerance of -40C to 250C. My gut tells me it's along those lines hence the retro fit. But being a BMW, this resister isn't a simple ceramic, it's most likely SMD (surface mount and you can't be just replaced) hence in reality, they'll yank the board that part of the termination and replace it (probably a 100.00 board for a .5 cent resister). Now some CAN buses are terminated with a simple RJ45 terminated internally and used for this purpose, really depends on how it's done. I have my money on a simple little board swap (BMW isn't going to use RJ45 connectors for CAN bus termination - that's for little shops with no money) Last edited by huatian; 10-07-2014 at 08:53 PM..
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10-11-2014, 04:21 PM	#16
JPBesl Private First Class 29 Rep 121 Posts Drives: 2014 F82 M4 Join Date: Aug 2006 Location: NY iTrader: (0)	Just went in for my break-in service and had the CAN terminator show up as a bulletin. They didn't have the part so they have to bring me back in. Might want to call to make sure they have the part if you're bringing it in for service and want to get everything in one go. __________________ 2015 F82 M4 DCT (current) / 2012 991 C2S PDK / 2011 E92 M3 6MT / 2009 Cayman 6MT / 2007 E92 335i 6MT / 2004 E46 325xi 6MT / 2000 E36 Z3 M Coupe 5MT
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02-06-2015, 10:37 AM	#19
major one Private First Class 67 Rep 183 Posts Drives: 18 750i x-drive; 16 g550 Join Date: Aug 2014 Location: pittsburgh iTrader: (0)	i just returned from the dealer after having a 6mos check up completed. my m4 is subjected to this open campaign and will have the part replaced when it comes in. i was surprised really as the car runs beautifully and would not have known there was any issue whatsoever.
	Appreciate 0 Quote

02-06-2015, 10:38 AM	#20
major one Private First Class 67 Rep 183 Posts Drives: 18 750i x-drive; 16 g550 Join Date: Aug 2014 Location: pittsburgh iTrader: (0)	sorry - april '14 build.
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