cq diff lights

Alski501 · 27-12-08, 11:35 PM

Sorry guys if this has been covered elsewhere.
Not had the CQ long and i am still trying to learn about it.
I'm not mechanical or i'm affraid very technical so i hope this isn't a daft question.
Hopefully(if i've added the picture right) you can see the diff panel. I have a light that shows on the panel(not all the time), as if i've engaged the diff. But as you can see (hopefully) the diff switch is in a upright position. In fact i have not touched it since i bought the car! So the question i'm trying to ask is, is this normal for the light to come on when the diff has not been manually engaged? Could this be a sensor problem? The car seems to be driving fine, but i would like to hear any advice from you guys.

kerker21 · 28-12-08, 12:00 AM

no that light should only be on when lock engaged is there an air leak from the vacume lines to the back of the switch , pull the radio out and listen ??

Alski501 · 28-12-08, 12:20 AM

Quote:

Originally Posted by kerker21

no that light should only be on when lock engaged is there an air leak from the vacume lines to the back of the switch , pull the radio out and listen ??

Will do, thanks. Is this a serious problem?

steveb · 28-12-08, 09:48 AM

It will scrub your tyres out very quickly, it may be the one way valve leaking there is a thread about it on www.quattroforum.com i think

Alski501 · 28-12-08, 11:16 AM

Quote:

Originally Posted by steveb

It will scrub your tyres out very quickly, it may be the one way valve leaking there is a thread about it on www.quattroforum.com i think

Thanks Steve i'll take a look.

Alski501 · 28-12-08, 05:21 PM

Drove the CQ to work and back today. I thought this problem with the diff light was random! But today i have discovered that the light only comes on and off when i engage the car in fifth gear. I even switched the engine off, and it still came on when i engaged fifth!
So the question now is, why? Has any one else come across this problem? The car feels fine so i'm hoping it's nothing major?
Hope you guys can help.

kerker21 · 28-12-08, 05:28 PM

its the front dif light thats on so jack the car of the ground and spin one of the front wheels if thay both spin in the same direction the dif lock is on "i think" some one will corect me if im wrong if thay spin in oposite directions its not on .

darreno'd' · 28-12-08, 07:38 PM

I thought the "front" was actually the centre diff only, and the rear was the rear. Hence why the torsen cars only have one postion.

Nigel Conniford · 29-12-08, 01:52 PM

Change the one way valve which is hidden up behind the panel, Coxy should have the part number kicking around, its around about a tenner, mine started to do this when I was on full boost and the diffs will try and lock, Luckerly this only happened twice to me and a t low spped, Derek over on the quattroforum had this happen to hime two years ago on the way home from Castle Combe on a tight bend and he went streight on and totalled his WR quattro

Alski501 · 30-12-08, 02:14 AM

I'm pretty sure the diff doesnt change, if it does, i havn't noticed it. But its wierd why the light is only coming on when 5th is engaged.
Thanks for the advice guys.

28-12-08, 12:00 AM	#2
kerker21 Senior Member Classic Audi Club Member Join Date: Jul 2007 Posts: 1,412	no that light should only be on when lock engaged is there an air leak from the vacume lines to the back of the switch , pull the radio out and listen ?? __________________ chairman of the quattro owners club 85 UR WR Quattro 52 ford transit faf specialised big hit mtb ex Z1000R owner ex KTM Duke owner

28-12-08, 09:48 AM	#4
steveb Senior Member Classic Audi Club Member Join Date: Jul 2008 Location: West Berkshire Posts: 1,155	It will scrub your tyres out very quickly, it may be the one way valve leaking there is a thread about it on www.quattroforum.com i think __________________ [FONT] '76 Leyland Princess 2200 HLS '79 Scirocco storm '84 WR '89 coupe quattro '01 A2 1.4 TDI SE '14 A3 1.4 TFSI COD [/color][/size][/font]

28-12-08, 05:28 PM	#7
kerker21 Senior Member Classic Audi Club Member Join Date: Jul 2007 Posts: 1,412	its the front dif light thats on so jack the car of the ground and spin one of the front wheels if thay both spin in the same direction the dif lock is on "i think" some one will corect me if im wrong if thay spin in oposite directions its not on . __________________ chairman of the quattro owners club 85 UR WR Quattro 52 ford transit faf specialised big hit mtb ex Z1000R owner ex KTM Duke owner

28-12-08, 07:38 PM	#8
darreno'd' Mr Sixty Thousand!! Classic Audi Club Member Join Date: Jul 2007 Location: berkshire Posts: 1,729	I thought the "front" was actually the centre diff only, and the rear was the rear. Hence why the torsen cars only have one postion. __________________ http://www.oesems.co.uk/

29-12-08, 01:52 PM	#9
Nigel Conniford Chief Sausage Meister!! Classic Audi Club Member Join Date: Jul 2007 Posts: 3,614	Change the one way valve which is hidden up behind the panel, Coxy should have the part number kicking around, its around about a tenner, mine started to do this when I was on full boost and the diffs will try and lock, Luckerly this only happened twice to me and a t low spped, Derek over on the quattroforum had this happen to hime two years ago on the way home from Castle Combe on a tight bend and he went streight on and totalled his WR quattro __________________ Horsepower is the force that determines at what speed you hit the wall, Torque is the force that determines how far you take the wall with you after you hit it.

28-12-08, 05:21 PM	#6
Alski501 Grown up member Join Date: Dec 2008 Location: North Somerset Posts: 162	Drove the CQ to work and back today. I thought this problem with the diff light was random! But today i have discovered that the light only comes on and off when i engage the car in fifth gear. I even switched the engine off, and it still came on when i engaged fifth! So the question now is, why? Has any one else come across this problem? The car feels fine so i'm hoping it's nothing major? Hope you guys can help.

30-12-08, 02:14 AM	#10
Alski501 Grown up member Join Date: Dec 2008 Location: North Somerset Posts: 162	I'm pretty sure the diff doesnt change, if it does, i havn't noticed it. But its wierd why the light is only coming on when 5th is engaged. Thanks for the advice guys.

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