Spooky FBH

Heddy · 25th July 2013, 12:23

While replacing a bonnet cable the FBH whirred, just for 30 secs or so and then shut up. Think ignition switch was set to accessories but not ready for a start up. Thought it a tad spooky in this weather. Is this normal or should I search for a fault?

Cheers.

johnny t · 25th July 2013, 12:27

I don't know if it should, but i noticed mine doing exactly the same thing

suffolk boy · 25th July 2013, 13:03

no it should not whir into life in this weather.chances are your pcb has a fault contact french mike for a repair.

Woodsie · 25th July 2013, 14:21

Mine does it as well, when I open the door or boot it kicks into life. There is a cure for it on here somewhere I think its the middle wire that needs disconnecting or cutting, not sure of the link but someone will know. Not done anything with mine, sort of got used to it.

suffolk boy · 25th July 2013, 15:04

the wire referred to is the kbus wire which is red and white with a yellow horizontal stripe. my advice is do not cut this wire unplug the heater or pull the fuse and get it fixed correctly.ps cutting this wire will not make it work btw.

johnny t · 25th July 2013, 15:14

I you sure it is faulty? I just thought it was programed to run the fan to stop it from seizing up, mine has always done it, even when locked

bl52krz · 25th July 2013, 19:59

Mine has also done it, not very often, but does seem spooky in a quiet garage.

Heddy · 25th July 2013, 20:06

Well gentlemen, it seems we are now entering--------'The Twilight Zone.'

suffolk boy · 25th July 2013, 20:10

Quote:

Originally Posted by johnny t

I you sure it is faulty? I just thought it was programed to run the fan to stop it from seizing up, mine has always done it, even when locked

mine never has.i have not heard of the function you describe.as for the fan seizing i doubt it.might stop the water pump from sticking but thats about it,

HarryM1BYT · 25th July 2013, 20:22

The story goes, that the FBH was partially programmed to respond to signals on the K-Bus, but it was never completed - an incomplete project. Under certain fault conditions the FBH can not only trigger itself into activity, but can trigger other items on the K-bus into activity.

If the FBH suddenly bursts into life when you open the drivers door, or other weird problems, you have little choice other than to cut the K-bus wire at the 6pin plug mentioned above.

The wire serves no function at all, other than when connected to a T4, when the T4 can interrogate the FBH. It can cause problems to the T4, if the T4 sees that the FBH should be there, but fails to respond - so I have heard.
So, if you disconnect it - ensure it can be easily reconnected.

25th July 2013, 12:23	#1
Heddy This is my second home None Join Date: Feb 2013 Location: None Posts: 5,556 Thanks: 465 Thanked 1,161 Times in 924 Posts	Spooky FBH While replacing a bonnet cable the FBH whirred, just for 30 secs or so and then shut up. Think ignition switch was set to accessories but not ready for a start up. Thought it a tad spooky in this weather. Is this normal or should I search for a fault? Cheers.

25th July 2013, 12:27	#2
johnny t Loves to post MG ZT 135+/ MG ZT 260 Join Date: Apr 2007 Location: Chesterfield, Posts: 290 Thanks: 21 Thanked 19 Times in 14 Posts	I don't know if it should, but i noticed mine doing exactly the same thing __________________ [SIGPIC][/SIGPIC]

25th July 2013, 13:03	#3
suffolk boy This is my second home fiat panda Join Date: Sep 2009 Location: haverhill Posts: 6,720 Thanks: 96 Thanked 586 Times in 526 Posts	no it should not whir into life in this weather.chances are your pcb has a fault contact french mike for a repair. __________________ fiat panda 1.2 eco

25th July 2013, 15:04	#5
suffolk boy This is my second home fiat panda Join Date: Sep 2009 Location: haverhill Posts: 6,720 Thanks: 96 Thanked 586 Times in 526 Posts	the wire referred to is the kbus wire which is red and white with a yellow horizontal stripe. my advice is do not cut this wire unplug the heater or pull the fuse and get it fixed correctly.ps cutting this wire will not make it work btw. __________________ fiat panda 1.2 eco

25th July 2013, 15:14	#6
johnny t Loves to post MG ZT 135+/ MG ZT 260 Join Date: Apr 2007 Location: Chesterfield, Posts: 290 Thanks: 21 Thanked 19 Times in 14 Posts	I you sure it is faulty? I just thought it was programed to run the fan to stop it from seizing up, mine has always done it, even when locked __________________ [SIGPIC][/SIGPIC]

25th July 2013, 14:21	#4
Woodsie Avid contributor Rover 75 Club CDT SE Saloon manual Join Date: Sep 2012 Location: Newport on Tay Posts: 191 Thanks: 69 Thanked 18 Times in 17 Posts	Mine does it as well, when I open the door or boot it kicks into life. There is a cure for it on here somewhere I think its the middle wire that needs disconnecting or cutting, not sure of the link but someone will know. Not done anything with mine, sort of got used to it.

25th July 2013, 19:59	#7
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,444 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Mine has also done it, not very often, but does seem spooky in a quiet garage. __________________ Great Barr, Birmingham.

25th July 2013, 20:06	#8
Heddy This is my second home None Join Date: Feb 2013 Location: None Posts: 5,556 Thanks: 465 Thanked 1,161 Times in 924 Posts	Well gentlemen, it seems we are now entering--------'The Twilight Zone.'

25th July 2013, 20:22	#10
HarryM1BYT This is my second home 75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010 Location: Leeds Posts: 17,273 Thanks: 2,160 Thanked 2,061 Times in 1,586 Posts	The story goes, that the FBH was partially programmed to respond to signals on the K-Bus, but it was never completed - an incomplete project. Under certain fault conditions the FBH can not only trigger itself into activity, but can trigger other items on the K-bus into activity. If the FBH suddenly bursts into life when you open the drivers door, or other weird problems, you have little choice other than to cut the K-bus wire at the 6pin plug mentioned above. The wire serves no function at all, other than when connected to a T4, when the T4 can interrogate the FBH. It can cause problems to the T4, if the T4 sees that the FBH should be there, but fails to respond - so I have heard. So, if you disconnect it - ensure it can be easily reconnected. __________________ Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money.