E60 Airbag module repair 93F9

[dunkler]

Hi
I have a BMW E60 '05 which has a fault code stored "93F9 - Low Reserve Voltage" and cannot be cleared. After I've searched on google I think it has something to do with backup power and some faulty capacitors. Does anyone have any ideea about this, do I need to replace those capacitors or rewrite a good dump? Car have been reflashed so I don't think it's a firmware issue

LE: Problem solved, changing the capacitors will cure fault 93F9. 8200uF 63V 35x35. I attached a photo with them, good luck

[Yurghen]

Hi, thank you for repair solution.
your airbag SGM still No faults? (after replacing capacitors)
how did you remove capacitors from the electrical board, capacitors are glued with epoxy.?

Thank you in advance.

[h3ndal33]

Thank you. Going to give this a try...

[dunkler]

Usually 83F9 will go with new capacitors but had one module which I've had to reball the CPU, strange. No errors so far

[UnDeR_ScOr3]

Hi dunkler

What do u mean reball cpu? Is it the same as flashing it? Rewrite firmware?

Is it easy to open the module? What about desolderind and soldering back the capacitors? Easy? Difficult? Do you need any special equipment? How many capacitors does it have?
Sorry for so many questions. Really need some help with this.

Would two of these do the job?

384916
Thanks in advance.

[UnDeR_ScOr3]

Anyone? please...

[markpilk]

Is it easy to remove the old capacitors. I'm getting fault 93f9, voltage of reserve energy v60 n.i.o. Really interested if it can be repaired

[markpilk]

Reballing is done a lot with computer chips, where controlled heat is applied to chips, to hopefully repair any cracks in the solder joints within.

[autopro68]

Hh vbnnnnn


Envoy? de mon iPhone en utilisant Tapatalk

[ptikkala]

Did you use 105c capacitors or 85c?

[BusCan]

Hi
I encountered the same problem on a BMW E60
I changed the capacitors without result
The problem and the BST
After change all and OK
Good luck

[BusCan]

Hello everyone
Eventually the problem persisted 93F9 return code
The solution I replaced them with an opportunity and reprogrammed and all and OK
I think the BGA and cause it's malfunction!
Good luck

[WackyII]

I have them same problem and I hope changing the capacitors will solve the issue.

[BusCan]

I have them same problem and I hope changing the capacitors will solve the issue.

hi
I changed the capacitor that did not change anything.
I change ECU and all and returned to order
Good luck

[ivazol]

Hi dunkler! I have same problem than you. I can see your attached photo. Where is this module in bmw car?

[morgano]

Facing same problem today, have spare module that only spit vin number not match error, is possible clone old 93F9 faulty vin to new working module?

Thanks

[joker01]

avere winkfp e k dcan cable ???
in addition to the frame it seems to me that the "time of the ecu" should with ista-d.....

[TJOT]

HELLO, I HAVE THE SAME PROBLEM AND I'M GOING TO TRY TO CHANGE CAPACITORS NOW.
THANK YOU

[marek128]

I changed the capiators but no luck - did reprogram, recode, start system time no luck - 93f9 - spannung u60 n.i.o. After connect on capiators see 60V but immanginally goes down slowly like the power supply go off?

U think need to change other capiators on board?