self activating airbag - Page 2

Rincewind · 11th November 2007, 17:03

Quote:

Originally Posted by Paranoid Carlos

Where are the impact sensors on 75's ?

There are no impact sensors as such on the 75/ZT, things have changed a bit since then.

The SRS system is controlled by the DCU (Dynamic Control Unit) that is located under your elbow below the centre console. It is a box that is monitoring the car and detects forward, rearward and lateral impact pulses and then it decided if and when to fire the bags either front, or side (plus curtains if fitted).

Nic.

PS no, I'm not in India - I am however out in Italy testing again as I type this. Only arrived today and I've got 9 days out here so as my trip falls over a weekend, I'm hopefully going to pop over to Lamborghini again to get some pictures in the museum as I couldn't do it last time I was here, and then on my way up to my Auntie who lives on Lake Garda, I've got to go through Modena, so I may pay a visit to the Prancing Horse manufacturer and see what I can see too!

Alex30013k · 11th November 2007, 17:19

Got one of these on both sides....
It is something to do with the Air Bags

The DCU (Dynamic Control Unit) sliver Box near the gear stick

Jules · 11th November 2007, 17:21

Scary thread this.
You beat me to it Alex.......

A 52 plate 75 I had all the carpets out of recently, had 2 extra impact sensors
mounted half way along the inner sills. Pretty sure they said SRS on them.

Anyway the point is, if your car has had plenum flooding on the past or any water leak that flooded the carpets, then these sensors are going to get very damp or worse still completely submerged!!!!

Finally my advice to anyone driving round with an intermittent SRS lamp....get it sorted ASAP! Don't keep moving the seats or wiggling the wires as a temporary fix( Pence to fix and under an hours labour both seats)

An intermittent feed to an SRS device due to a faulty connection in my opinion, could be the very cause of the mystery deployment.

Departed · 12th November 2007, 12:35

It's not a later thing to have these side sensors. My '99 Cowley car has them too.

And you are right, they get drowned when you have a water leak.

I don't know how they 'talk' to the main control unit, but I would expect that water stopped them triggering and caused a warning lamp.

More likely, is a short between the wiring to the seat bags and something else, maybe where something got hot and melted some wires together.

If the airbag unit had triggered them as a result of getting a crash signal from the side sensor, I would expect a code to be stored in the airbag ECU, and a warning lamp to be on the dashboard now, but that may not be so.

Phil · 12th November 2007, 21:54

When the airbags have gone off, does it blow the srs control unit on Rovers? Honda ones burn out and I just wondered if the Rover ones were the same.

JohnDotCom · 12th November 2007, 22:01

You have to replace the Control Box and Obviously the Airbags that went off. (according to XPart who I asked about this).

Jules · 13th November 2007, 00:28

Yep
I could confirm that also; the airbag control unit is rendered useless if activated.

JohnDotCom · 13th November 2007, 07:42

Thanks Jules.

11th November 2007, 17:21	#13
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	Srs Things To Check Scary thread this. You beat me to it Alex....... A 52 plate 75 I had all the carpets out of recently, had 2 extra impact sensors mounted half way along the inner sills. Pretty sure they said SRS on them. Anyway the point is, if your car has had plenum flooding on the past or any water leak that flooded the carpets, then these sensors are going to get very damp or worse still completely submerged!!!! Finally my advice to anyone driving round with an intermittent SRS lamp....get it sorted ASAP! Don't keep moving the seats or wiggling the wires as a temporary fix( Pence to fix and under an hours labour both seats) An intermittent feed to an SRS device due to a faulty connection in my opinion, could be the very cause of the mystery deployment. __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

12th November 2007, 21:54	#15
Phil This is my second home Rover 75 CDT Connoisseur SE Join Date: Nov 2006 Location: Wales Posts: 12,227 Thanks: 469 Thanked 523 Times in 241 Posts	When the airbags have gone off, does it blow the srs control unit on Rovers? Honda ones burn out and I just wondered if the Rover ones were the same. __________________

13th November 2007, 00:28	#17
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	Yep I could confirm that also; the airbag control unit is rendered useless if activated. __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

11th November 2007, 17:19	#12
Alex30013k Posted a thing or two Rover 75 Saloon 2.0 CDTi Conn Se Join Date: Nov 2006 Location: Ashford Kent Posts: 1,560 Thanks: 17 Thanked 29 Times in 21 Posts	Got one of these on both sides.... It is something to do with the Air Bags The DCU (Dynamic Control Unit) sliver Box near the gear stick

12th November 2007, 12:35	#14
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	It's not a later thing to have these side sensors. My '99 Cowley car has them too. And you are right, they get drowned when you have a water leak. I don't know how they 'talk' to the main control unit, but I would expect that water stopped them triggering and caused a warning lamp. More likely, is a short between the wiring to the seat bags and something else, maybe where something got hot and melted some wires together. If the airbag unit had triggered them as a result of getting a crash signal from the side sensor, I would expect a code to be stored in the airbag ECU, and a warning lamp to be on the dashboard now, but that may not be so.

12th November 2007, 22:01	#16
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	You have to replace the Control Box and Obviously the Airbags that went off. (according to XPart who I asked about this).

13th November 2007, 07:42	#18
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	Thanks Jules.