Srs warning light

[finallyrangie]

Hello people,
I'm after suggestions for what could cause the srs light to be on, the nanocom reads no faults, even when the light is on, clear faults puts the light off, then it comes straight back on.
I've tried changing the clock spring, and the connections under the front seats both seem to be good, there is also a plug in the dash, passenger side, which I've checked as well, all seem good.
Both front seat belts get used regularly, so I don't think that's the issue, not quite sure what to check next.

All suggestions gratefully received

[sierrafery]

Hi, unplug a pretensioner then read code again, if you dont get open circuit for that one the DCU becomes very suspect cos once the light is on it should log a fault code too unless nanocom is misbehaving in this case cos it's not the best with the SRS, i've had something similar once and found a logged code with hawkeye while nanocom didnt show any especially that you said that there is no code logged but the light goes out when you clear that non-existent code

[Tikka7mm08]

Just been through this... test continuity of the pretensioners to see if fault there, use electrical contact cleaner on connections, if SRS light staying on it is the DCU under the cubby box - replace. We thought we had our one sorted after wet river crossings and liberal spray of contact cleaner but came back a couple of days later - replaced the DCU under the cubby box and all good since.

[finallyrangie]

Just to finish this one off, finally got time to change the srs ecu over yesterday, its under the cubby box between the front seats, not difficult but very fiddly, the srs warning light has gone and on the couple of short drives I've done so far it seems to be staying off, so hopefully that's the end of that.

Thank you all for your help and suggestions, this forum really is the best thing

[Tins]

Just to finish this one off, finally got time to change the srs ecu over yesterday, its under the cubby box between the front seats, not difficult but very fiddly, the srs warning light has gone and on the couple of short drives I've done so far it seems to be staying off, so hopefully that's the end of that.

Thank you all for your help and suggestions, this forum really is the best thing

Can you tell me where you bought the yellow box?

[finallyrangie]

Can you tell me where you bought the yellow box?I looked on eBay first, a few about for 125-160, then got the one from the UK that was 36 dollars including postage, if you can wait a week they are almost giving them away over there. Just make sure your ebay setting allows you to buy from overseas

[Tins]

I looked on eBay first, a few about for 125-160, then got the one from the UK that was 36 dollars including postage, if you can wait a week they are almost giving them away over there. Just make sure your ebay setting allows you to buy from overseas

I get lots of stuff from OS. So it's second hand? I have no problem with that btw, the one in my car is 24 yo.

[finallyrangie]

I get lots of stuff from OS. So it's second hand? I have no problem with that btw, the one in my car is 24 yo.Yes it's a used one mate, I wasn't sure that was the problem and didn't want to throw a lot of money at the wrong thing, seems to be working perfectly now though, so I'm just going to leave it alone!

[sierrafery]

I get lots of stuff from OS. So it's second hand? I have no problem with that btw, the one in my car is 24 yo.
Heres a cheap one LAND ROVER DISCOVERY SRS Control Unit Module YWC106600 | eBay (https://www.ebay.com.au/itm/302988971123?_trkparms=amclksrc%3DITM%26aid%3D1110 006%26algo%3DHOMESPLICE.SIM%26ao%3D2%26asc%3D20230 928123234%26meid%3D8fb0e93825b8411a859a59f7201190e f%26pid%3D101196%26rk%3D1%26rkt%3D12%26sd%3D193654 212294%26itm%3D302988971123%26pmt%3D1%26noa%3D0%26 pg%3D4429486%26algv%3DSimplAMLv9PairwiseUnbiasedWe bWithSearchFilterPromotionWithSaasShippingFitmentP romotion%26brand%3DLand%2BRover&_trksid=p4429486.c101196.m2219&amdata=cksum%3A3029889711238fb0e93825b8411a859a59f 7201190ef%7Cenc%3AAQAIAAABQNI7KH%252FkMN0XlqIig1VA YWtmDXYVaqhQDlS4JbO1bPMVKuuGI9jkufipe8vr8C75BJYEgJ Ya0WXkYHfRDT7ZQ%252FhX2Ce%252FqDs9Yb2Qvor1D%252Fr% 252Bxh08ATn4TK4ONK9j9tAvCsGbzzZy%252BgWLrBN4oGs%25 2F2pq6uZl82NGum8JS87YQvwytdNN6NBn6SbJXN%252FZJI6ax f2Zdz9NcL367bc8WEdREAFGID12%252FcpkeGF1O5ypffXYX%2 52FVrPmFahKZs%252FjA6G7QTb9sHIVfYuTBTg9BQSne9GlhS% 252BK%252BcHmHt4nDvYjgE4kn113BQlj8%252BxPKUvDEOz%2 52FLUOp4ktgufW6H9UdVhX%252B6DeGIhtN9S%252Ba82pdxZw VS77UGaiSFlqxQ1cDG7LhwT%252B10eniCkNTS1eLbcNEi83Ej k98K0P5ap9W8ngwgvbgBHqt%252Fa8%7Campid%3APL_CLK%7C clp%3A4429486&epid=649584403) or even cheaper LAND ROVER DISCOVERY SRS Control Unit Module YWC106600 | eBay (https://www.ebay.com.au/itm/174108380531?_trkparms=amclksrc%3DITM%26aid%3D1110 006%26algo%3DHOMESPLICE.SIM%26ao%3D2%26asc%3D20230 928123234%26meid%3D8fb0e93825b8411a859a59f7201190e f%26pid%3D101196%26rk%3D2%26rkt%3D12%26sd%3D193654 212294%26itm%3D174108380531%26pmt%3D1%26noa%3D0%26 pg%3D4429486%26algv%3DSimplAMLv9PairwiseUnbiasedWe bWithSearchFilterPromotionWithSaasShippingFitmentP romotion%26brand%3DLand%2BRover&_trksid=p4429486.c101196.m2219&amdata=cksum%3A1741083805318fb0e93825b8411a859a59f 7201190ef%7Cenc%3AAQAIAAABMNI7KH%252FkMN0XlqIig1VA YWtmDXYVaqhQDlS4JbO1bPMVKuuGI9jkufipe8vr8C75BJYEgJ Ya0WXkYHfRDT7ZQ%252FhX2Ce%252FqDs9Yb2Qvor1D%252Fr% 252Bxh08ATn4TK4ONK9j9tAvChPReep%252Fm%252FZG2Lb2uT ewpVnhAD4NtZloykJEf%252BQV4HuGzpK7lqyJ48lHiTgGoViC cMUMw9y089M%252F1XvUzYrTK%252BseQ%252B0fke9AT4EzD% 252FUrzGMPsIU%252FBRHnO56olJkqV1YYcXfRPjRUOhcsrg6o %252FpUYudJ9XnG7czS9k9MRDPDZZiocYP6FWkBt0xxfkzhA65 bfuX3wwftJVwltO50osm%252FTjd504LUBcLm5FbdLyUUPTXkp 4MregkKDwIRb2sV3nVhkxA%252FDvCWFrCjxkFk3gtNlWow%25 3D%7Campid%3APL_CLK%7Cclp%3A4429486&epid=649584403)

[Tins]

My car logs "Drivers airbag logged short circuit permanent", which is helpful.....

[sierrafery]

My car logs "Drivers airbag logged short circuit permanent", which is helpful.....
Unplug it and if you dont get open circuit that way then you should rule out the DCU but if you get the open circuit the problem is beyond that connector toward the bag

[Tins]

Unplug it and if you dont get open circuit that way then you should rule out the DCU but if you get the open circuit the problem is beyond that connector toward the bag

Thanks. SF. I already replaced the clock spring but stupidly didn't think to redo the test with it unplugged. Well. in my defence I did have the battery off....

[sierrafery]

Thanks. SF. I already replaced the clock spring but stupidly didn't think to redo the test with it unplugged. Well. in my defence I did have the battery off....
Remember that in most cases the clock spring faults are "open circuit", i've never seen short circuit code which was caused by the clock spring as the tracks in it get interrupted not shorted, for a short circuit it should be exposed to some physical "intrusion" or water ingress iMO.

[Tins]

Remember that in most cases the clock spring faults are "open circuit", i've never seen short circuit code which was caused by the clock spring as the tracks in it get interrupted not shorted, for a short circuit it should be exposed to some physical "intrusion" or water ingress iMO.

I did the clock spring before I decided I needed a nanocom again. But thanks for that. Makes sense.

[Tins]

Unplug it and if you dont get open circuit that way then you should rule out the DCU but if you get the open circuit the problem is beyond that connector toward the bag

OK. Unplugged. Nanocom now says driver's airbag open circuit. I'm a little nervous screwing around with the airbag itself. Heard enough loud bangs in my life.[bigsad]
Is there a safe way of testing this, or is it a new bag required. According to the Nano the bag is the original fitted to the car.

[Tins]

OK. Unplugged. Nanocom now says driver's airbag open circuit. I'm a little nervous screwing around with the airbag itself. Heard enough loud bangs in my life.[bigsad]
Is there a safe way of testing this, or is it a new bag required. According to the Nano the bag is the original fitted to the car.

Of course, the clock spring I got could be as bad as the one originally in the car. I guess I'm safe testing the one I have sitting around!

[Tins]

Of course, the clock spring I got could be as bad as the one originally in the car. I guess I'm safe testing the one I have sitting around!

Hmm... found an old thread on LandyZone which you, SF, contributed to. Still none the wiser except in that it seems likely that a SH rotary coupler is just as likely to be as bad as the one I already have, and doesn't help as to testing them....

[sierrafery]

To check the bag you need a resistor to connect instead of it dont mess with multimeter in the bag's plug... probably you need a new one

google out "airbag simulator resistor"

[Tins]

To check the bag you need a resistor to connect instead of it dont mess with multimeter in the bag's plug... probably you need a new one

google out "airbag simulator resistor"

Thanks. I know about not putting a mm to the bag! BANG!

Resistor goggle coming up

[Tins]

I changed the cluster today for one that's not cracked. synced the odo to the BCU. Noticed that the SRS light is not on. Now, I know the fault is still logged, so I guess someone has been into this cluster before me.... I have no intention of selling the car, and the guy said I could blank off the light.... but I still want to fix it. Eventually. Anyone know a good source of driver airbags??? There are a few in the UK, but of course they can't be posted...

[sierrafery]

I dont know how your rules are there but here the missing SRS warning on ignition self test is a MOT failure, check if it's not black tape on the LED cos otherwise the wire to it must get a positive feed to be extinguished...unless the PO was not so brutal to "kill" the LED

[Tins]

I dont know how your rules are there but here the missing SRS warning on ignition self test is a MOT failure, check if it's not black tape on the LED cos otherwise the wire to it must get a positive feed to be extinguished...unless the PO was not so brutal to "kill" the LED

It's the same here. The bloke here will overlook it in my case.... But like I said I want to fix it. So I will probably swap the clear cover to get rid of the cracks and put my own cluster back. I'll follow up with the resistors though. The clock spring tests ok

[Bohica]

OK. Unplugged. Nanocom now says driver's airbag open circuit. I'm a little nervous screwing around with the airbag itself. Heard enough loud bangs in my life.[bigsad]
Is there a safe way of testing this, or is it a new bag required. According to the Nano the bag is the original fitted to the car.

This makes loud bangs.
SHORT: 'Beethoven' Exploder Revisited - YouTube (https://www.youtube.com/watch?v=RHgKKUfkZYI)

[Tins]

This makes loud bangs.
SHORT: 'Beethoven' Exploder Revisited - YouTube (https://www.youtube.com/watch?v=RHgKKUfkZYI)

I have used a Beethoven. The device itself makes no noise at all save a furious whirring noise when cranked. It was the forty or so holes with gelignite and nitropril that went BANG. Watch out for falling rocks!