Home alot now with my projects

[Fredrik73]

Fredrik,
My thinking is not up to par.
Your car backfires. The FEM sends wheel speed info to the PCU/ECU (engine control module) which fires the spark plug coils according to speed or no speed.
If FEM fuse is blown that might do it.

Hermann
i have the electricdiagram book so i think it shows that 4 pin power connection c201g and of i find it iIn that book i Will look for pin 3 and 4.

thank you for the help, its night here now so tomorrow i Will try to find it in the book
Fredrik

[Fredrik73]

Fredrik,
My thinking is not up to par.
Your car backfires. The FEM sends wheel speed info to the PCU/ECU (engine control module) which fires the spark plug coils according to speed or no speed.
If FEM fuse is blown that might do it.

i Will sheck fuse F4.31 but im sure i have tested all fuses before, feels like the FEM sends out wrong or no signals to the coils

[Fredrik73]

Frank,
The item in the red zone are a high power connectors. Main power pins (3=12V and 4=Ground) (30amp fuse Battery junction box (BJB) fuse F4.31). Power windows, pins 1 and 2.
The Black spring like fingers, clamping the power transistors to the cast aluminum FEM chassis, are on the right side of your picture. What is the heat sink looking thing on the left side?
If it is a heat sink then this is not a picture of a 2002 FEM.

P.S. I looked at the sacrificial FEM I have laying around, and it looks the left side is showing the connector pins.

Are pins 1and2 for powerwindow on both driverside and passengerside? Because my passengerside powerwindow works but not driver side

[Fredrik73]

I feel you my friend, since the lockdown seems everything that COULD go wrong did...15 years in the house we built and I think all the systems have reached the end of their useful life:

A $700 septic tank repair, a $300 air conditioning repair, a roof leak.then lightning hit the house and did about $3,500 worth of damage (a direct hit which over-whelmed our surge suppressor) of which insurance will cover about $2,000. This doesn't count the EMP from the strike wiping out my jet ski that will require a $1,200 computer and perhaps a $750 throttle body.

Damn computers, my 20 year old Sea Ray boat with points and a carburetor is just fine - go figure... Daughter works for big pharma so, she's good and might even get a bonus - you have to count your blessings... Now I find out I need cataract eye surgery but that will be delayed for a good while due to the backlog from the virus... Oh well, I'm still on the right side of the dirt..

Frank thats bad luck! hit by the lightning...
i hope everything salves it sounds like You have alot of funny Toys, and soon this Corona thing is over ihope i did also see my doctor via internet
/Fredrik

[Fredrik73]

Frank,
The item in the red zone are a high power connectors. Main power pins (3=12V and 4=Ground) (30amp fuse Battery junction box (BJB) fuse F4.31). Power windows, pins 1 and 2.
The Black spring like fingers, clamping the power transistors to the cast aluminum FEM chassis, are on the right side of your picture. What is the heat sink looking thing on the left side?
If it is a heat sink then this is not a picture of a 2002 FEM.

P.S. I looked at the sacrificial FEM I have laying around, and it looks the left side is showing the connector pins.

I hope it is for a 2002 on my photo because this is the card i have in my 2002 (or have i wrong FEM?)

[Fredrik73]

Got new ignitioncoils from England yesterday for my flat track bike so now there are sparks on both cylinders

[Fredrik73]

And another unplanned project showed up in between i just had to Save this bike
it was rusty and yellow but now its read
EFB8873D-AF40-40B3-A0F8-C7878B1B4E5C.jpeg98FDC634-E23E-4117-B3FF-8F0AB03587AE.jpeg

[HKS]

Are pins 1and2 for powerwindow on both driverside and passengerside? Because my passengerside powerwindow works but not driver side

Passenger side is powered by REM rear electronic module.
Drivers side is powered by FEM.

[Frank Dreano]

I don't know what the modern convention is for electrical components but I find it odd that common systems' functions were divided among two disparate electrical boxes....e.g. power windows and lighting, but maybe that's just me...

[HKS]

I don't know what the modern convention is for electrical components but I find it odd that common systems' functions were divided among two disparate electrical boxes....e.g. power windows and lighting, but maybe that's just me...

The 2 boxes look identical from the outside. If they put all functions in one enclosure, they surely would need to put a fan on it to cool the power transistors. It may have to do with wire routing also.
Hermann

[Fredrik73]

Fredrik,

See those spring like fingers. They are holding the MOSFET power transistors to the aluminum FEM frame.
What does not work? I can tell you which one is bad for the Instrument lights and the one that causes hard steering. I can look the others up also, like lights etc.
MOSFETS cost $2.00 labor costs much more unless you do it yourself.

I can tell you how to test for bad MOSFET transistors.
Also, if I were doing the repair, I would not unsolder the 3 pin MOSFETs. I would cut them off and then solder the new ones leads to the existing old ones cut off leads. Less chance of damage to the circuit board. Getting the spring like clamps off is another story. You need to make a tool. Let me know if you are interested.
I hope your wife gets the job also. Take care.
Hermann

P.S. Is is easier to just replace the MOSFETs and bypass testing. They are easier to test after they are removed. Also there and P and N type MOSFETS.

Hello Hermann
im now trying to salv this
wich MOSFET do you know about?
and do you know What kind or number on it is ?

i also want to know please how to measure if a MOSFET is allright
i gues i must cut it off to get the right measurement?
thank you from Fredrik

[Fredrik73]

here are the MOFETS i wonder about
what they do and what kind it is so i can change them if i find any one faulty
Fredrik

IMG_0603.JPG

[007Cruiser]

here are the MOFETS i wonder about
what they do and what kind it is so i can change them if i find any one faulty
Fredrik

IMG_0603.JPG

I’m impressed! I wouldn’t know a MOSFET from a ratchet.

[Fredrik73]

Same same but different hihihi

[HKS]

here are the MOFETS i wonder about
what they do and what kind it is so i can change them if i find any one faulty
Fredrik

IMG_0603.JPG

Ok I will look them up and tell you what each one does.
Hermann
Q35 is power steering and is PMOS MOSFET positive.