Rover 75 airbag light........need help!

Gerard_Berends · 29th June 2015, 20:50

Dear members,

Since April of this year I am the proud owner of a Rover 75 2.5V6 Sterling of 2000.
And after having spend 'some' money and giving the car the very much needed mechanical TLC

I even love it more!

There's just one thing that my garage is not able to to resolve and that's the airbag light ... so would really appreciate some help in this as my garage is officially stuck now and doens't now how to proceed.

Some history on this matter:
When I bought the car, the airbag light was on. But I didnt worry since this is a common fault for a Rover 75.

Garage analysed it with T4 and saw the following errocodes:
*malfunction in the left side airbag sensor setting
* Failure in the left side airbag sensor communication
(Sorry, am translating from Dutch)

Erasing the errorcodes didn't work; they would re-appear instantly.
Next step: they took out the seats end removed the plugs for both the belt tensioners and side airbags, extended and soldered them.
Erased the errorcodes but still the same result.

Bought a used side airbag and connected it; same result.
Checked wiring to side airbag: that is ok.
Checked resistance of side airbag, that is also ok.

Then tried to change settings in airbag ecu. That isn't possible without reprogramming the engine-ecu. And that is not possible because the airbag ecu is not recognized properly by the T4.

So.. am stuck now and would really really appreciate some help in getting this fault out of the way!

Thnx in advance,

Gerard

Zircon · 30th June 2015, 09:52

Quote:

Originally Posted by Gerard_Berends

Dear members,

Since April of this year I am the proud owner of a Rover 75 2.5V6 Sterling of 2000.
And after having spend 'some' money and giving the car the very much needed mechanical TLC

I even love it more!

There's just one thing that my garage is not able to to resolve and that's the airbag light ... so would really appreciate some help in this as my garage is officially stuck now and doens't now how to proceed.

Some history on this matter:
When I bought the car, the airbag light was on. But I didnt worry since this is a common fault for a Rover 75.

Garage analysed it with T4 and saw the following errocodes:
*malfunction in the left side airbag sensor setting
* Failure in the left side airbag sensor communication
(Sorry, am translating from Dutch)

Erasing the errorcodes didn't work; they would re-appear instantly.
Next step: they took out the seats end removed the plugs for both the belt tensioners and side airbags, extended and soldered them.
Erased the errorcodes but still the same result.

Bought a used side airbag and connected it; same result.
Checked wiring to side airbag: that is ok.
Checked resistance of side airbag, that is also ok.

Then tried to change settings in airbag ecu. That isn't possible without reprogramming the engine-ecu. And that is not possible because the airbag ecu is not recognized properly by the T4.

So.. am stuck now and would really really appreciate some help in getting this fault out of the way!

Thnx in advance,

Gerard

Hello Gerard and welcome to the Club

. I also enjoy owning a year-2000 2.5 V6!

You may find that you need a new airbag ECU (sometimes called a DCU). This solved the problem for me last year and they are sold at a reasonable price by Best of British - see http://www.ebay.co.uk/itm/ROVER-75-M...item3cd5a104fb. It would need to be installed in your car using a T4 I believe.

Hope this helps. Other more technically-minded members may have different suggestions.

Enjoy your car

.

All the best, Nicholas/Zircon

KWIL · 30th June 2015, 14:18

You mention "side airbag sensor setting", have you checked the side impact unit that is mounted on the inside of the cill?

chris75 · 30th June 2015, 16:49

Quote:

Originally Posted by KWIL

You mention "side airbag sensor setting", have you checked the side impact unit that is mounted on the inside of the cill?

Agreed

This "side impact sensor " is a common cause of the light staying on , often but not always caused by damp floors / leaks destroying the sensor. It is bolted to a cross member under the passenger seat ( LHS ) As far as I know there isn't one under the driver's seat , but someone will correct me if I am wrong

Gerard_Berends · 1st July 2015, 19:04

Thank you all for taking the effort and time to reply.

Good to see that there are still people out there that take the time to help eachother out and keep these great cars on the road

Ok, trying to summarize your advice: looks like the side impact sensor under the driver seat should be replaced first, and if that doens't help then the airbag ecu. The airbag ecu would then also require a T4 job to be programmed.

Wondered around the internet a bit looking for these parts...

Two more questions before ordering:

The airbag ecu part YWC107090 has been used in Land Rovers and Rover 75, correct?
Am asking because the Land Rover YWC107090 is available close to where I live, the Rover 75 one is not.
The side impact sensor is part YDB10030 and located under the driver seat, correct?

Waiting for your answers and then will order parts.
As soon as I have the parts and have the work done, I'll update you all on the results.

Cheers,

Gerard

Teddy · 2nd July 2015, 18:51

Sorry Folks, but I will answer in Dutch.
Gerard, ik had hetzelfde probleem, alles onder beide voorstoelen doorverbonden maar het lampje bleef branden. Uiteindelijk bleek het probleem te liggen aan de gordelvanger van de passagierstoel. Deze vervangen voor een 2ehands, probleem opgelost.Hopelijk kan je hier wat mee.
Groet, je naamgenoot :-)

trebor · 2nd July 2015, 19:21

For the impact sensor Rimmers are using part number YWJ101340 although their picture still shows YDB100310 ( nla )

Similar story with ECU picture shows old part number of YWC107090 but they are using YWJ101590

Zircon · 2nd July 2015, 19:34

Quote:

Originally Posted by Zircon

Hello Gerard and welcome to the Club

. I also enjoy owning a year-2000 2.5 V6!

You may find that you need a new airbag ECU (sometimes called a DCU). This solved the problem for me last year and they are sold at a reasonable price by Best of British - see http://www.ebay.co.uk/itm/ROVER-75-M...item3cd5a104fb. It would need to be installed in your car using a T4 I believe.

Hope this helps. Other more technically-minded members may have different suggestions.

Enjoy your car

.

All the best, Nicholas/Zircon

My pleasure, Gerard,

Do please double-check that the Land Rover part number for the airbag ECU/DCU are identical and compare the costs of each - at the time for me, the Best of British price was the cheapest I could find

.

All the best,

Nicholas/Zircon

Gerard_Berends · 9th July 2015, 19:02

Dear all,

Today my garage replaced the Side-Impact sensor by a used one and guess what: the airbag light is off and stays off!

Looking at the replaced one, it is obvious why it failed: it had been submerged in water and was totaly corroded :-(

So thank you all for helping me out in resolving this issue.

Taking my car to Norway for a holiday of 3 weeks now. Fingers crossed

Anon3 · 9th July 2015, 23:29

It's always good to see a problem solved.
Have a good holiday Gerard

29th June 2015, 20:50	#1
Gerard_Berends Newbie Rover 75 Join Date: Jun 2015 Location: Amsterdam Posts: 18 Thanks: 2 Thanked 2 Times in 2 Posts	Rover 75 airbag light........need help! Dear members, Since April of this year I am the proud owner of a Rover 75 2.5V6 Sterling of 2000. And after having spend 'some' money and giving the car the very much needed mechanical TLC I even love it more! There's just one thing that my garage is not able to to resolve and that's the airbag light ... so would really appreciate some help in this as my garage is officially stuck now and doens't now how to proceed. Some history on this matter: When I bought the car, the airbag light was on. But I didnt worry since this is a common fault for a Rover 75. Garage analysed it with T4 and saw the following errocodes: malfunction in the left side airbag sensor setting Failure in the left side airbag sensor communication (Sorry, am translating from Dutch) Erasing the errorcodes didn't work; they would re-appear instantly. Next step: they took out the seats end removed the plugs for both the belt tensioners and side airbags, extended and soldered them. Erased the errorcodes but still the same result. Bought a used side airbag and connected it; same result. Checked wiring to side airbag: that is ok. Checked resistance of side airbag, that is also ok. Then tried to change settings in airbag ecu. That isn't possible without reprogramming the engine-ecu. And that is not possible because the airbag ecu is not recognized properly by the T4. So.. am stuck now and would really really appreciate some help in getting this fault out of the way! Thnx in advance, Gerard

1st July 2015, 19:04	#5
Gerard_Berends Newbie Rover 75 Join Date: Jun 2015 Location: Amsterdam Posts: 18 Thanks: 2 Thanked 2 Times in 2 Posts	Thank you all for taking the effort and time to reply. Good to see that there are still people out there that take the time to help eachother out and keep these great cars on the road Ok, trying to summarize your advice: looks like the side impact sensor under the driver seat should be replaced first, and if that doens't help then the airbag ecu. The airbag ecu would then also require a T4 job to be programmed. Wondered around the internet a bit looking for these parts... Two more questions before ordering: The airbag ecu part YWC107090 has been used in Land Rovers and Rover 75, correct? Am asking because the Land Rover YWC107090 is available close to where I live, the Rover 75 one is not. The side impact sensor is part YDB10030 and located under the driver seat, correct? Waiting for your answers and then will order parts. As soon as I have the parts and have the work done, I'll update you all on the results. Cheers, Gerard

2nd July 2015, 19:21	#7
trebor This is my second home Rover 75 CDTi Connoisseur SE & MG ZT Saloon 190 Join Date: Jun 2007 Location: Coven Posts: 12,522 Thanks: 526 Thanked 1,877 Times in 885 Posts	For the impact sensor Rimmers are using part number YWJ101340 although their picture still shows YDB100310 ( nla ) Similar story with ECU picture shows old part number of YWC107090 but they are using YWJ101590 __________________ www.midlandsnanomeets.co.uk Robs Car Gallery Coven near Wolverhampton WV9 2000 Cowley Built Rover 75 2.0 V6 Club SE/ Atlantic Blue/ Sandstone/Walnut (daily driver) 2003 Land Rover Freelander 1 TD4 HSE Helsinki Blue/Black Leather (swmbo daily driver) Last edited by trebor; 2nd July 2015 at 19:32..

9th July 2015, 19:02	#9
Gerard_Berends Newbie Rover 75 Join Date: Jun 2015 Location: Amsterdam Posts: 18 Thanks: 2 Thanked 2 Times in 2 Posts	Solved! Dear all, Today my garage replaced the Side-Impact sensor by a used one and guess what: the airbag light is off and stays off! Looking at the replaced one, it is obvious why it failed: it had been submerged in water and was totaly corroded :-( So thank you all for helping me out in resolving this issue. Taking my car to Norway for a holiday of 3 weeks now. Fingers crossed Last edited by Gerard_Berends; 9th July 2015 at 19:06..

9th July 2015, 23:29	#10
Anon3 Posted a thing or two Rover 75 Join Date: Mar 2014 Location: Birmingham Posts: 1,392 Thanks: 199 Thanked 219 Times in 187 Posts	It's always good to see a problem solved. Have a good holiday Gerard __________________ [SIGPIC][/SIGPIC] Villa, Stella, Balti. It's Brummie latin that means, er...... Vis tester available to local V6 owners

30th June 2015, 14:18	#3
KWIL Precise Rover 75 Tourer 2.5KV6 Connoisseur SE Join Date: Mar 2013 Location: Fleet Posts: 2,952 Thanks: 630 Thanked 617 Times in 480 Posts	You mention "side airbag sensor setting", have you checked the side impact unit that is mounted on the inside of the cill?

2nd July 2015, 18:51	#6
Teddy Avid contributor Rover 75 saloon 2.5 auto Join Date: Mar 2011 Location: Zandvoort NL Posts: 177 Thanks: 72 Thanked 23 Times in 16 Posts	Sorry Folks, but I will answer in Dutch. Gerard, ik had hetzelfde probleem, alles onder beide voorstoelen doorverbonden maar het lampje bleef branden. Uiteindelijk bleek het probleem te liggen aan de gordelvanger van de passagierstoel. Deze vervangen voor een 2ehands, probleem opgelost.Hopelijk kan je hier wat mee. Groet, je naamgenoot :-)