Hi everybody,

My wife was going to use the Volvo tonight instead of the

van,so when she was adjusting the seat it wasnt moving.

I came by to check if it was a blown fuse, but it was not that.

I have never have problems with power seats before,

so I do not know what to check here. Recently about 2

months ago I took it to a volvo shop because the power

windows randomly stopped working and it was not the fuse

neither the relay. He said it was short behind the fuse main

box so he fixed it. I am assuming that this problem could be

something like that as well. Where is the best place to start

troubleshooting the problem? I dont want to

Take it to the mechanic again to check it.

 

Are ALL the functions inop?
If so the problems most likely is the CONTROLLER. It's a rather large green electronic box under the seat. It will probably smell burned and the circuit board will have a break. You can repair the break or get a new controller.

 

there's two different power seat configurations on 7/9s, the earlier style with no memory, and the newer one with the 1,2,3 memory buttons. the memory controller has a box under the seat, while the non-memory ones don't.

my kid's 940SE had the non-memory seats, and there was a dead relay in the switch module so it wouldn't work at all. I bypassed the relay, and discovered half the motors were jammed up anyways, and the whole thing needed rebuilding, meh. ended up putting hte non-power seats from my 740 into it (hey, while my 740 seats were shreaded they weren't as bad as that 940SE"s, hah), and my 740 got a pair of seats I scored from a later 960, drivers powered, passenger not.

there's a pile of things you could test. there's a connector under the carpet near the front edge of the lefthand rail of the driver seat, where the power goes to the seat, so making sure there's power there would be a good first thing to test. there's actually THREE connectors there, one for the power seats, one for the seat heaters, and another for the seat belt sensor. I'll have to look up the wiring diagrams to tell whats which and I'm too tired tonight.

 

It does has the memory option with the power seat but nothing works as far moving back,

forward, down or up, and the back doesnt move either. Im going to look into that today.

I will reply back with results. There is a junker near me with at least 6 940's and 960's

so im gonna go give it a check.

Thanks guys

 

All '94 are "memory" if powered...
A JY is definitely the best source for that Green Box. BTW it's not called a CONTROLLER, this meaning the SWITCH in most cases. I am not sure what the Volvo name is for the part in question but pretty sure that that's what ails you.

Your problem now is removing the seat without power to the seat: how do you get to the front (or the rear bolts)?... and that's somewhat of a challenge....

 

Yeah i figured that. Now that I read from Pierce that the 960 seats will fit on it.

I think I am going to make my cloth interior car to leather from an S90 which are in very

good condition. I am going to make him an offer to see if he accepts.

 

I did note that newer seats had a different power connector than an earlier car... so if you're pulling seats from a JY S90, take as much of the harness as you can from the car side, too.

also, the seatbelt attachments may differ, but you can transplant them (very large torx driver bit required, with quite a bit of torque on these)... for instance, the seats I got had inverted dual seat belt retractors, but I was able to use the seatbelts from my car. ditto different versions of the side trim pieces can be transplanted as the seat frames are the same. I also had to cut a square tab off the back end of the tracks of the donor seats so my car's trim pieces would fit on them.

 

loading my 940 OTP disk now... ok, C158 is the 4 pin seat power connector on a 1994 940, this is just forward of the front of the outboard rail, jammed under the carpet (and under the plastic cover)

pin 1 is green-red on the car side, and red-black on the seat side, and is unswitched power from fuse 3.
pin 2 is yellow on the car side, orange on the seat side, and is ignition switched power from fuse 15
pin 3 is black on both sides and is ground
pin 4 is green or blue-white on the car side, and white on the seat side, and is the seat controller diagnostic signal that goes to pin 6 of the onboard diagnostic B block.

so, if you unplug that connector, and put a volt meter between 3 and 2 you should see power only when the ignition switch is on, and between 3 and 1 you shoudl see always-on power. if you DO see both of these, then the problem IS in the seat. if not, its upstream in the power chain.

 

Ohhh thanks I appreciate your input! What about the side airbags? My car has those and the s90 has those as well on the seat but will it be same connector too? I offered him 80$ for the full set, front and back, and he agreed I just want to know about the airbag cause i dont want to have the SRS light on.

 

Volvo 940's did not have side air bags. They only have two airbags, one in the steering wheel and the other above the glove box.

 

Im sorry but i believe they do have the side airbag located inside the seats to the side. I was at the Junkyard today and i saw a side impact on a 940 and its side airbag went off.

 

The 850 turbo had side airbags and they were an option on the early non-turbo 850's. The 940's and 960's didn't get the side air bags until around 1996. The last year that the 940's were imported into the United States was 1995, meaning that none of them here have side airbags. The car that you saw at the junkyard was probably a later model 960 or an S90.

 

940s don't have side airbags, they have SIPS (side impact protection system) which is not the same thing.

 

...and the 960 seats I installed didn't have side airbags either.

 

Well im going back and im going to show pictures and it was a 940 with and airbag deployed by the side impact that it had.

 

It was a 94 960, but im confused if they started putting those in 95 for the redesigned 960 how come the older 960 had that?

 

the 760/960 always got the higher end safety features a few years prior to the 740/940 models.

 

It is very possible that they were an option and then became standard on the newer models. That's how it was with the 850's, the non-turbo models had the option of the side air bags but latter it became standard equipped.

 

Learned something new. As to the power seats it was the Controller. All is good now. Next weekend im going to put the 960 seats. :-D

 

both the VADIS parts catalog, and the various greenbooks on the OTP 940/960/S90/V90 DVD don't make any mention of SIPS bags until 1996. The parts catalog for 1994 960's has no mention of SIPS bags at all, the 1995 one only lists seats explicitly without SIPS bags. In the "New Car Features" for 1995 940/960, there's ZERO mention of SIPS airbags. the 1995 960 gained more SIPS features inside the doors, but thats not airbags

The 1996 New Car Features DOES say the 850 style SIPS Bags were provided with all 960s'.... "Both front seats of all 960 1996 are now equipped with SIPS bags of the same design that were installed in the 1995 850. The sensor is slightly faurther back than the 850. Because the seat can be moved a long way back and forward it is important to have the sensor located in hthe correct position for the car. etc etc"

note that SIPS bags in the seats are fired by a percussion-cap like trigger thats in the side of the base of the seat, its designed to fire when the door is deformed sufficiently to hit the base of the seat, and the sensor has to be hit with the equiv of an 18km/h side impact. There's a trigger safety device on the inside of the seat pocket/motor control thing that can be placed on the sensor to prevent accidental discharges when working on it.

and yes, if you have SIPS bags, you can't use aftermarket seat covers