Repairing a 'fried' N54 MSD80 DME

JMARS · 08-21-2012, 11:13 AM

Great Job! WOW!

marv85 · 08-21-2012, 11:24 AM

Respect Sir! you must have done quite a lot of probing to pinpoint the problem. Luckily only that transistor was fried.

Thanks for sharing the processor's ballmap.

Jeff@TopGearSolutions · 08-21-2012, 11:28 AM

Just when I thought I was the man for hooking up a car stereo this guy comes in!

Nice work man. Electronics and I dont mix.

jb's335 · 08-21-2012, 11:44 AM

Quote:

Originally Posted by Jeff@topgearsolutions

Just when I thought I was the man for hooking up a car stereo this guy comes in!

Nice work man. Electronics and I dont mix.

I hate electronics too. Thats why we have an electronics guy on staff and its not me lol.

ar design II · 08-21-2012, 12:57 PM

nice work! Impressive!

marconi118 · 08-22-2012, 08:20 AM

what is the mosfet part N°?

Roy Cormier · 08-22-2012, 12:38 PM

IRF644S. This was the closest match I could find at Digi-Key when comparing the datasheets. The original part was IRF644B.

Rotary Rasp · 08-22-2012, 05:39 PM

Impressive!

E90Company · 08-22-2012, 05:43 PM

Genius! Nice work

nydog · 08-22-2012, 08:14 PM

Very nice job!

For those not as brave as you. I had the same codes on my new acquired 07 335i, 37k miles with no warranty. Turns out DME is covered under Federal Emissions Warranty, 8yrs or 80,000 miles. This took me digging in plain site to find out, page 39 of the service and warranty manual. The dealer informed me I'm covered today.

Roy Cormier · 08-23-2012, 08:38 AM

I was really hoping mine would have been covered too. The odometer had just gotten to 82,000 miles when this happened.

saxon · 09-20-2012, 03:47 PM

can you tell me exactly how you found out that that was the faulty part? i keep getting a cylinder 5 misfire and cant figure out why, figuring its something in the dme

joec500 · 09-20-2012, 04:59 PM

Quote:

Originally Posted by saxon

can you tell me exactly how you found out that that was the faulty part? i keep getting a cylinder 5 misfire and cant figure out why, figuring its something in the dme

I was curious if you would also get a 30BB failure if it was actually a DME issue?

JamesM3M5 · 09-20-2012, 05:05 PM

I emailed Pico Technologies to ask whether their scopes can check firing circuit on the piezo direct injectors. I have a Pico 3223, used it to look at all sorts of electronics problems from a diagnostic standpoint. If they ever email me back, I'll let you know what it takes to scope the injector circuit. The coil circuit is easy.

He checked wiring diagrams and found a shorted transistor for injector #5. Looks like a wiring harness fault took out the transistor, not an internal failure.

SkySoldier · 09-20-2012, 08:51 PM

Good job, a breath of fresh air around here. I like your other TT to

enrita · 10-16-2012, 06:28 AM

where you able to pinpoint the coils drivers?

Sered · 10-16-2012, 07:19 AM

I've never seen this; this is awesome.

akotten · 10-17-2012, 02:29 AM

Quote:

Originally Posted by Roy Cormier

I was really hoping mine would have been covered too. The odometer had just gotten to 82,000 miles when this happened.

Nice work! I didn't realize you were on the forums here haha. This place needs some good DIY's.

-Alex

.. · 12-02-2012, 08:08 AM

I'm only able to find IRF644SPBF, looking at the datasheet this seems fine, what do you think?

scottp999 · 12-02-2012, 09:38 AM

Great info. Curious, what was the dealer quote?

shaginwagon13 · 12-02-2012, 10:16 AM

Wow good for you for doing this.... no way in hell I would even attempt this on my car haha

dlbrooks18 · 12-02-2012, 10:39 AM

Are DMEs interchangeable between cars, what would this entail, jus wondering if it is indeed possible to swap a "flashed" DME?

08-21-2012, 11:24 AM	#24
marv85 Colonel Drives: '07 335i MT Join Date: Jun 2010 Location: Portland Posts: 2,547 iTrader: (4)	Respect Sir! you must have done quite a lot of probing to pinpoint the problem. Luckily only that transistor was fried. Thanks for sharing the processor's ballmap. __________________ '10 E92 335i , COBB
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08-21-2012, 11:28 AM	#25
Jeff@TopGearSolutions BimmerPost Supporting Vendor Drives: C6 Z06, GSXR-750, 09 335i Join Date: Dec 2008 Location: TopGearSolutions.com Posts: 14,417 iTrader: (26)	Just when I thought I was the man for hooking up a car stereo this guy comes in! Nice work man. Electronics and I dont mix. __________________ \|VRSF DP & FMIC\|\|Facebook Discounts\|Best Price on COBB AP\|\|80W LED Angel Eyes!\| Email: Jeff@TopGearSolutions.com Phone: 973-283-5771 (M-F 10-6 EST)
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08-22-2012, 12:38 PM	#29
Roy Cormier Private Drives: Single Turbo 335i Join Date: Feb 2012 Location: Green Bay, WI Posts: 61 iTrader: (0)	IRF644S. This was the closest match I could find at Digi-Key when comparing the datasheets. The original part was IRF644B. __________________ Single Turbo E92 BMW 335i \| roycormier.net \| My YouTube channel If you can leave black marks on a straight from the time you exit a corner till the time you brake for the next turn....... Then, you have enough horsepower.
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08-22-2012, 05:39 PM	#30
Rotary Rasp Lieutenant Colonel Drives: 2009 E92 335i 6MT Join Date: Aug 2008 Location: SoCal - Torrance Posts: 1,528 iTrader: (6)	Impressive! __________________
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08-22-2012, 05:43 PM	#31
E90Company Major General Drives: 335i Join Date: Mar 2012 Location: Tallahassee Posts: 6,138 iTrader: (2)	Genius! Nice work __________________ E90 N54 6AT
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08-21-2012, 11:13 AM	#23
JMARS Not Baned Drives: Single-T WTCC e90 Join Date: Aug 2008 Location: Boca Raton, FL Posts: 1,054 iTrader: (5)	Great Job! WOW!
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08-21-2012, 12:57 PM	#27
ar design II BimmerPost Supporting Vendor Drives: which one? Join Date: Jan 2012 Location: Denver, CO Posts: 738 iTrader: (1)	nice work! Impressive!
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08-22-2012, 08:20 AM	#28
marconi118 Captain Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe Posts: 927 iTrader: (0)	what is the mosfet part N°?
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08-22-2012, 08:14 PM	#32
nydog Enlisted Member Drives: e92 335i Join Date: Apr 2011 Location: Beacon, NY Posts: 31 iTrader: (0)	Very nice job! For those not as brave as you. I had the same codes on my new acquired 07 335i, 37k miles with no warranty. Turns out DME is covered under Federal Emissions Warranty, 8yrs or 80,000 miles. This took me digging in plain site to find out, page 39 of the service and warranty manual. The dealer informed me I'm covered today.
	0

08-23-2012, 08:38 AM	#33
Roy Cormier Private Drives: Single Turbo 335i Join Date: Feb 2012 Location: Green Bay, WI Posts: 61 iTrader: (0)	I was really hoping mine would have been covered too. The odometer had just gotten to 82,000 miles when this happened. __________________ Single Turbo E92 BMW 335i \| roycormier.net \| My YouTube channel If you can leave black marks on a straight from the time you exit a corner till the time you brake for the next turn....... Then, you have enough horsepower.
	0

09-20-2012, 03:47 PM	#34
saxon First Lieutenant Drives: 07 335i Join Date: Oct 2011 Location: pa Posts: 325 iTrader: (2)	can you tell me exactly how you found out that that was the faulty part? i keep getting a cylinder 5 misfire and cant figure out why, figuring its something in the dme
	0

09-20-2012, 05:05 PM	#36
JamesM3M5 Some dude Drives: E28 M5, E92 335i Join Date: Sep 2011 Location: Northern VA Posts: 1,619 iTrader: (0)	I emailed Pico Technologies to ask whether their scopes can check firing circuit on the piezo direct injectors. I have a Pico 3223, used it to look at all sorts of electronics problems from a diagnostic standpoint. If they ever email me back, I'll let you know what it takes to scope the injector circuit. The coil circuit is easy. He checked wiring diagrams and found a shorted transistor for injector #5. Looks like a wiring harness fault took out the transistor, not an internal failure. __________________ RRT Racing E92 335i/6MT Dinan Stage 3: intercooler, oil cooler, intake, flash, exhaust, LW dual-mass flywheel. Vishnu PWM methanol custom trunk mount, Diffsonline 3-clutch Salisbury custom diff, Ohlins Road and Track coilovers, Vorshlag camber plates, much more... E28 M5 w/ buncha stuff, R171 SLK350
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09-20-2012, 08:51 PM	#37
SkySoldier Private Drives: Jet Black E90 335I Join Date: Mar 2008 Location: USA Posts: 93 iTrader: (1)	Good job, a breath of fresh air around here. I like your other TT to __________________ 2008 Jet Black 335I E90 Mods: Procede, HPF intercooler, Helene filter, intake scoops, Riss Racing can, 18" VM V710 wheels, PIAA angel eyes, black grill, blacklines, 20% tint, OE CF splitters and spoiler. 1999 Pearl White 3000GT VR4 (far from stock)
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10-16-2012, 06:28 AM	#38
enrita Major General Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden Posts: 7,267 iTrader: (0)	where you able to pinpoint the coils drivers? __________________ 07 335i AT - TD St.2 Turbos - COBB (Custom Cobb mapping by http://www.protuningfreaks.com/) - JB4G5 ISO - Okada Coils - NGK 5992 Plugs - E85 Walbro - Injen Intake - Helix IC - Snow Stg. 3 - Stett CP - AR DPs - midpipes 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - Level 10 AT upgrade - Alpina AT Flash
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10-16-2012, 07:19 AM	#39
Sered Lieutenant Drives: 07 E92 Sport, 6MT Join Date: Apr 2012 Location: Melbourne, FL Posts: 427 iTrader: (0)	I've never seen this; this is awesome. __________________ '09 E93 M3 6MT, H&R sports, 15/12.5 TMS spacers, VF540 kit on the way '09 Z4 sDrive35i, Deep Sea Blue Metallic, DCT, Premium Pkg, Ivory Leather pkg
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12-02-2012, 08:08 AM	#41
.. Colonel Drives: BMW Join Date: Jun 2009 Location: Miami Posts: 2,329 iTrader: (15)	I'm only able to find IRF644SPBF, looking at the datasheet this seems fine, what do you think?
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12-02-2012, 09:38 AM	#42
scottp999 MFP - Twin Turbo I6 Interceptor Drives: 335i - E92 - 6MT & 4runner SR5 Join Date: Mar 2007 Location: MD Posts: 4,536 iTrader: (1) Garage List 2007 BMW 335 [4.50]	Great info. Curious, what was the dealer quote? __________________ Rob Beck Turbos, PROcede Rev. 3, Procede Fueling Flash (via OpenFlash Tablet), PPS Methanol System (DO12/Aquamist Flow Sensor), DCI, Quaife LSD, BMW Performance Suspension, Autobahn Exotics Exhaust, Helix FMIC, AR Design Downpipes, BSH Catch Can, Forge Diverter Valves, P3cars Vent Boost Gauge, Alufelgen CSL Reps, Lux 5.1 H8 Angel Eyes, HPB HID Fogs, LTBMW M3 Side Skirts, BMW M3 Rear Spoiler, BMW Front Aero Lip, BMW Pedal Kit, BMW M Shift Knob, Autotecknic Matte Black Grilles.
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12-02-2012, 10:16 AM	#43
shaginwagon13 Captain Drives: BMW 335i Coupe Join Date: Apr 2012 Location: Toronto Posts: 861 iTrader: (4)	Wow good for you for doing this.... no way in hell I would even attempt this on my car haha
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12-02-2012, 10:39 AM	#44
dlbrooks18 Brigadier General Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles Posts: 3,351 iTrader: (2)	Are DMEs interchangeable between cars, what would this entail, jus wondering if it is indeed possible to swap a "flashed" DME? __________________ 2008 E90 335
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