BMS powerbox installation help

ispeedyi · 10-02-2010, 09:57 AM

Weird Buzzing sound from ECU box once I re-insert the smaller connector into the ECU (when i push the slider back in) this is the step before connecting PBX box to the harness on page 26 of installation guide.

Any idea what this buzzing is? I disconnected the connector to avoid the sound. I will re-check all the connections tomorrow morning. Just wondering if anyone experienced something similar?

I have a 325 2.5l (EURO/Asia spec).. I noticed for the Small grey sub connector my pin 7 is actually white with yellow stripe rather than plain white as stated in the instruction manual. O_o does this matter?

Manual says: "Small gray subconnector:
PBX yellow - pin 7 (white)"

Hope I didn't fry anything.

update: fixed it. the problem was i put the grey/black subconnector in the wrong slots (black in grey and vice versa) (even though i thought it was impossible.. i managed to do it that way) thus they were stuck in there. pain in the a$$ to get back out.. for people installing on your own.. don't rush and don't force anything in.

danchee · 10-02-2010, 11:36 AM

That's the correct one - white with yellow stripe. My car is the same - 09 USA model. The manual needs to be updated...

ispeedyi · 10-02-2010, 09:22 PM

Any ideas what the buzzing sound is?

i have re-checked all the wiring but can't get the black and grey subconnectors out again (they seem to be stuck in the ECU holder)

DimSum · 10-02-2010, 09:36 PM

Nice car, I also have a 2.5L euro.
PBX works fine for me. No buzzing sound.

danchee · 10-04-2010, 09:11 PM

I don't have the buzzing sound, so I'm not sure what's causing it. Keep the cover open and try listening to it to pin point where the issue is?

10-02-2010, 09:57 AM	#1
ispeedyi Private 3 Rep 93 Posts Drives: AW E90 LCI 325i Join Date: Jul 2009 Location: Shanghai iTrader: (0)	BMS powerbox installation help Weird Buzzing sound from ECU box once I re-insert the smaller connector into the ECU (when i push the slider back in) this is the step before connecting PBX box to the harness on page 26 of installation guide. Any idea what this buzzing is? I disconnected the connector to avoid the sound. I will re-check all the connections tomorrow morning. Just wondering if anyone experienced something similar? I have a 325 2.5l (EURO/Asia spec).. I noticed for the Small grey sub connector my pin 7 is actually white with yellow stripe rather than plain white as stated in the instruction manual. O_o does this matter? Manual says: "Small gray subconnector: PBX yellow - pin 7 (white)" Hope I didn't fry anything. update: fixed it. the problem was i put the grey/black subconnector in the wrong slots (black in grey and vice versa) (even though i thought it was impossible.. i managed to do it that way) thus they were stuck in there. pain in the a$$ to get back out.. for people installing on your own.. don't rush and don't force anything in. Last edited by ispeedyi; 10-03-2010 at 12:00 AM..
	Appreciate 0 Tweet Quote

10-02-2010, 11:36 AM	#2
danchee Lieutenant 136 Rep 453 Posts Drives: 21 X7 40i Join Date: Dec 2009 Location: Rainy City iTrader: (0)	That's the correct one - white with yellow stripe. My car is the same - 09 USA model. The manual needs to be updated...
	Appreciate 0 Quote

10-02-2010, 09:22 PM	#3
ispeedyi Private 3 Rep 93 Posts Drives: AW E90 LCI 325i Join Date: Jul 2009 Location: Shanghai iTrader: (0)	Any ideas what the buzzing sound is? i have re-checked all the wiring but can't get the black and grey subconnectors out again (they seem to be stuck in the ECU holder)
	Appreciate 0 Quote

10-02-2010, 09:36 PM	#4
DimSum Banned 202 Rep 2,740 Posts Drives: SLOW Join Date: May 2008 Location: LITTLEBIMMER.COM iTrader: (10)	Nice car, I also have a 2.5L euro. PBX works fine for me. No buzzing sound.
	Appreciate 0 Quote

10-04-2010, 09:11 PM	#5
danchee Lieutenant 136 Rep 453 Posts Drives: 21 X7 40i Join Date: Dec 2009 Location: Rainy City iTrader: (0)	I don't have the buzzing sound, so I'm not sure what's causing it. Keep the cover open and try listening to it to pin point where the issue is?
	Appreciate 0 Quote