Range Rover P38 late 1999 4.6 LHD. Interior very poor, so took up offer of a mid-98 interior for exactly same model. Only problem encountered is that replacement front seats do not have side impact air bags in SRS system, so SRS fault lights up. I understand that the complete SRS may be inoperable until fault rectified? I understand that system needs to see a specific resistance on the circuit leading to each bag on start up check; so, a suitable rated resistor must be installed at the SRS plug leading to each seat. Questions: Is my approach correct? What is a suitable rating for these resistors? I am advised NOT to test resistance of the air bag with a multimeter or risk setting them off – correct? If not correct, what is the method of testing?
P38A SRS System Fault
- Thread starter JonmBG
- Start date
This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
- Posts
- 58,170
- Location
- Preston Lancs.
2.2 Ohms is popular but you can get packs of different value resisters off Ebay for little money. Or this to do job properly. https://www.ebay.co.uk/itm/Garage-m...097924?hash=item3408de7c44:g:4wUAAOSwoMddLPS2
Datatek
Well-Known Member
- Posts
- 45,023
- Location
- Near Poitiers SW France
2.2 ohms did not work on my cars, I'll PM you with the value I use.
- Posts
- 58,170
- Location
- Preston Lancs.
Why not post it on here so everybody knows?
Datatek
Well-Known Member
- Posts
- 45,023
- Location
- Near Poitiers SW France
Legal liability.
- Posts
- 58,170
- Location
- Preston Lancs.
Ok point taken. Don't know how the machine i posted works but i would think you connect it to the feed and turn it until the lamp goes out. Then that gives you your resistance value.
Datatek
Well-Known Member
- Posts
- 45,023
- Location
- Near Poitiers SW France
If you have diagnostics, you can find the resistance with a multi turn potentiometer, reducing the resistance until you get to a value that works, disconnect the pot and measure the resistance. That's how I did it, not rocket science.
- Posts
- 58,170
- Location
- Preston Lancs.
True but that is you or i not average Landyzone users.
Datatek
Well-Known Member
- Posts
- 45,023
- Location
- Near Poitiers SW France
What vehicle are those readings from and which airbag in the system?
- Posts
- 19,309
- Location
- Buckinghamshire, UK. ('95 DT)
Hiya
Indeed @Grrrrrr beat me to it , for my D3
The 10. 2 ohms was one of the faulty airbags in my drivers seat
Is that what u meant or the others as well
Datatek
Well-Known Member
- Posts
- 45,023
- Location
- Near Poitiers SW France
No, I was interested in what the 2.2 ohms represents, which airbag, I presume it's the airbag igniter resistance?
The side airbags in the P38 are not 2.2 ohms, the front driver and passenger ones might be, I have not checked.
The side airbags in all P38's will be past their use by date, so IMO ought to be removed.
Hi
after fitting a new seat air bag , the passengers / drivers seat , A to C curtain airbags are the 2.2 ohm
The 2.84 ohms are the passengers dashboard airbag and steering wheel airbag
Last figures are the rear curtain airbags
These are of course all readings from my D3
Hope that helps
Datatek
Well-Known Member
- Posts
- 45,023
- Location
- Near Poitiers SW France
Thanks for that Stuart. It just adds to the knowledge.
Ur very welcome and always happy to help where I can considering the extensive amount of times you’ve helped me
