Is anyone familiar with the relationship between these two circuits - or if there even is one?

Background:

The SRS warning lamp has been illuminated for a couple of weeks now. It just appeared - for no apparent reason. No accident, no heavy slams - just business as usual. Doesn't show up with a handheld Actron OBDII scanner. First thought was that it was somehow linked to the date of manufacture. Volvo strongly urges a visit to the dealer after a certain amount of years past DOM to have the SRS system checked out. But I cannot find anything to indicate that the light comes on at a certain age.

Killing the power from the battery does not clear it. No amount/method of key dancing seems to work either.

No to my question:

Are the seatbelt switches interfaced with the SRS?

As I was sitting in the car this evening - scratching my head and staring at the instrument cluster - it suddenly dawned on me that the little man with the strap across his chest was not there. If you fail to "use common sense" (like I fail to do) and buckle up when you are in the seat, he always appears (immediately to the left of the little bubble man -SRS).

It just seems to be too much of a co-incidence that the SRS warning lamp is lit and the seatbelt warning light isn't. I mean really, how often does the seatbelt warning fail. Most people spend lots of time trying to disable it.

The SRS and Seatbelts are connected to the same computer control module. Did you check all your fuses?

The reason the belt are connected to the SRS is because the SRS computer uses information to deploy airbags at different rates depending on seat belt use or non-use. The belts also have pre-tensioners to retract slack in an accident where the bags deploy.

You don't have to have the SRS system serviced as the book states anymore. Volvo revised its SRS expiration date because of the years of study on the SRS systems, they found no wear on air bag components no matter what the age.

Disconnecting the battery will not erase an SRS code. They are recorded in hard memory.

How many miles you have? I think from previous posts when I replied to you, that your mileage is getting up there. Check your owners book for the SRS system warranty. Not sure the exact terms but I am positive the SRS warranty is for a longer term that the normal car warranty.

+1

Thank you Mr S40guy - Good Answer!

That was the most articulate, comprehensive posting that I have seen in ages (well... other than those pearls of wisdom that I submit).

You must have either, (1) a remarkable memory or (2) a ton of time on your hands to recollect that my wife's car is a very high miler. I think it's well up into the 90's. Anyway, you know what, I have not checked fuses. I was actually thinking more along the lines of a penny or some foil in the drivers slot thus jumping the switch and completing the circuit.

Just figured that with a system as vital as the SRS/belt on is - that there would an alarm upon a power failure in addition to the normal "buckle up now" light. The car is not here tonight or tomorrow - but will check fuses as soon as it gets back in town.

And, good thought as regards the warranty angle , I will certainly check that out .

Hey, just as an aside; my Chrysler T&C is throwing a P0443. Solenoid is good, wiring rings out as having continuity (with no grounds). But, no voltage at the sens pin. As a test, I supplied 12 VDC direct from the battery and was able to operate the solenoid by manually grounding. But feeding the ctrl side back through the PCM gets no reaction. Ever hear of just one driver circuit on a Chrysler PCM going bad. The wiring was chafed through (the bracket failed and the leads were rubbing on the sinous belt . I thought that I had an easy one but, NO!

At this stage, everything points to a PCM malfunction. Oh yeah, the only reason I mention this is because the van is a 2003 with 82K and the emissions are only covered for 8/80. Dammit!

Thanks, Man - you're good!

as for your van problem if there was a short you might have fried the computer as you suspect. Check everywhere for fuses for that too. My friend had a mass air sensor problem on his Audi that we couldn't figure out and when he took it to the dealer they found a blown fuse that popped when he had a wire ground out on the PCM.

The reason I remember your car is because we both had that annoying P0015 timing code issuse.

Mine is still doing that too, but that's the least of my worries since the bearing started rattling, now on Monday I need to make some call to see what can be done about my motor.

I'm not very Volvo happy right now. I guess Volvo for life. turned into Volvo for 4 years. I never had a motor go bad in 4 years in my life.

Hey buddy just wondering if you got your SRS problem fixed? I checked on volvo's website and the SRS is covered for 5 years no mileage limit.

The Warranty Period

The warranty period is five (5) years and has no mileage/kilometer limitation.* It begins with the date the vehicle is sold/delivered to the first retail purchaser or put into service, whichever occurs first.

just thought I would share the info.

well i got a Volvo V 50 i got it from ICBC salvage and at the time of the accident the airbags did not deploy and the CRS light is lit and annoying what should i do
PS: the dealership says that because it was in an accident and the ICBC written it off and there's no warranty what should i do?????? :right:

V-M-T-D you light is probably on because even if the air bags didn't pop, its possible the seat belt pretensioners did.

My guess is you probably need new seat belts and more than likely u will need a new SRS control module.

If you bought it from salvage all warranties are void. They won't make good for anything.

Thanks S40 - That's good news. I needed a break on something - that Chrysler PCM thing is killing me.