Repairing a 'fried' N54 MSD80 DME

JMARS · 08-21-2012, 12:13 PM

Great Job! WOW!

marv85 · 08-21-2012, 12:24 PM

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, 12:28 PM

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, 12:44 PM

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, 01:57 PM

nice work! Impressive!

marconi118 · 08-22-2012, 09:20 AM

what is the mosfet part N°?

Roy Cormier · 08-22-2012, 01:38 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, 06:39 PM

Impressive!

E90Company · 08-22-2012, 06:43 PM

Genius! Nice work

nydog · 08-22-2012, 09:14 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, 09:38 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, 04:47 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, 05:59 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, 06:05 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, 09:51 PM

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

enrita · 10-16-2012, 07:28 AM

where you able to pinpoint the coils drivers?

Sered · 10-16-2012, 08:19 AM

I've never seen this; this is awesome.

akotten · 10-17-2012, 03:29 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, 09:08 AM

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

scottp999 · 12-02-2012, 10:38 AM

Great info. Curious, what was the dealer quote?

shaginwagon13 · 12-02-2012, 11:16 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, 11:39 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, 12:13 PM	#23
JMARS Not Baned 36 Rep 1,335 Posts Drives: Single-T WTCC e90 Join Date: Aug 2008 Location: Boca Raton, FL iTrader: (5)	Great Job! WOW! __________________ Motiv-900 HTA3794R \| Motiv PI \| Motiv/Fuel-IT! Stg3+ LPFP \| Motiv Cobb AEM EMS \| DSS Carbon Drive Shaft \| Spec SuperTwin-disc ** Front Mount \| Charge Pipe \| ** Oil Cooler \| JRZ Coilover \| ECS Performance Rear Trailing Arm \| UUC Tans Mount \| Full M3 Suspension \| AR Line Lock \| 5 Point Welded in Cage
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08-21-2012, 12:24 PM	#24
marv85 Colonel 31 Rep 2,590 Posts Drives: '07 335i MT Join Date: Jun 2010 Location: Portland iTrader: (5)	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. __________________ SOLD --'07 E90 335i, PTF COBB E50, HFS4, ER CP, ETS 7", AA DP, Vishnu Exhaust, DCI, ACT, Nitto Nt555 SOLD '10 E92 335i M, 6MT COBB v3, ER IC, ER CP, VRSF DP, Fuel-it st2, Mfactory LSD
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08-21-2012, 12:28 PM	#25
Jeff@TopGearSolutions BimmerPost Supporting Vendor 1726 Rep 42,625 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (36)	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. __________________ \|Facebook Discounts\|\|Evolution Racewerks\| \|Active Autowerke\| \|ETS\| \|Burger Tuning\| \|PURE Turbos\| \|Mishimoto\|\|VRSF\| \|AWE\| \|Wagner\| \|HPB 240W H8 Angel Eyes Now $99\| \|VTT\| \|KW\| \|Spec\| \|ST Coilovers\| \|Koni\| \|Bilstein\| \|Borla\| \|Magnaflow\| \|AFE\| \|Shifteck\| \|Injen\|Coding / PPK / Alpina
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08-21-2012, 01:57 PM	#27
ar design II Captain 27 Rep 773 Posts Drives: which one? Join Date: Jan 2012 Location: Denver, CO iTrader: (1)	nice work! Impressive!
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08-22-2012, 09:20 AM	#28
marconi118 Major 25 Rep 1,071 Posts Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe iTrader: (0)	what is the mosfet part N°?
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08-22-2012, 01:38 PM	#29
Roy Cormier Private 12 Rep 70 Posts Drives: Single Turbo 335i Join Date: Feb 2012 Location: Green Bay, WI 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, 06:39 PM	#30
Rotary Rasp Lieutenant Colonel 139 Rep 1,833 Posts Drives: 2009 E92 335i 6MT Join Date: Aug 2008 Location: SoCal - Torrance iTrader: (6)	Impressive! __________________
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08-22-2012, 06:43 PM	#31
E90Company Major General 93 Rep 6,137 Posts Drives: Car Join Date: Mar 2012 Location: FL iTrader: (2)	Genius! Nice work
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08-22-2012, 09:14 PM	#32
nydog Private First Class 10 Rep 150 Posts Drives: e92 M3 Join Date: Apr 2011 Location: Beacon, NY 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.
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08-23-2012, 09:38 AM	#33
Roy Cormier Private 12 Rep 70 Posts Drives: Single Turbo 335i Join Date: Feb 2012 Location: Green Bay, WI 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.
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09-20-2012, 04:47 PM	#34
saxon Captain 146 Rep 886 Posts Drives: s4 Join Date: Oct 2011 Location: pa iTrader: (3)	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
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09-20-2012, 06:05 PM	#36
JamesM3M5 Some dude 54 Rep 1,779 Posts Drives: E28 M5, E92 335i Join Date: Sep 2011 Location: Northern VA 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, 09:51 PM	#37
SkySoldier Private 3 Rep 93 Posts Drives: Jet Black E90 335I Join Date: Mar 2008 Location: USA 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, 07:28 AM	#38
enrita Major General 107 Rep 7,383 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	where you able to pinpoint the coils drivers? __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 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 - LUX H8 - Level 10 AT upgrade
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10-16-2012, 08:19 AM	#39
Sered Major 92 Rep 1,201 Posts Drives: 08 E90 335i Join Date: Apr 2012 Location: Melbourne, FL iTrader: (3)	I've never seen this; this is awesome. __________________ '08 E90 w/ just boltons '09 Z4 sDrive35i w/ just boltons
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12-02-2012, 09:08 AM	#41
._. Colonel 44 Rep 2,356 Posts Drives: BMW Join Date: Jun 2009 Location: Miami 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, 10:38 AM	#42
scottp999 Brigadier General 84 Rep 4,765 Posts Drives: 4runner SR5 Join Date: Mar 2007 Location: MD iTrader: (2) Garage List 2007 BMW 335 [4.50]	Great info. Curious, what was the dealer quote?
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12-02-2012, 11:16 AM	#43
shaginwagon13 Charted Accountant 18 Rep 939 Posts Drives: BMW 335i Coupe Join Date: Apr 2012 Location: Toronto 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, 11:39 AM	#44
dlbrooks18 Brigadier General 85 Rep 3,735 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles 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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