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Old 08-28-2005, 13:03   #1 (permalink)
nacho7
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power seat 94 850-Reset?

My 94 850 passenger seat is not responding to the power controls. It
will rise a bit and tilt forward a bit, but no forward or back. Memory
button 1 seems to work. Is there a way to reset the memory? Maybe with
the diagnostic LED system? Or does it require the Volvo OBDII reader?
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Old 08-28-2005, 22:01   #2 (permalink)
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Re: power seat 94 850-Reset?

In article <IMnQe.202040$0f.4238@tornado.texas.rr.com>, nacho7@wt.net
says...
> My 94 850 passenger seat is not responding to the power controls. It
> will rise a bit and tilt forward a bit, but no forward or back. Memory
> button 1 seems to work. Is there a way to reset the memory? Maybe with
> the diagnostic LED system? Or does it require the Volvo OBDII reader?
>

The seat should have: front-up/down, back-up/down, seat bottom-
forward/back, seat back-forward/back. Usually the bottom controls get
"sticky"--the seat back control cable stretches and disengages from the
drive at the hinge.

The Volvo VST can reset the seat motor potentiometers (Pre-OBDII). To
set the memeory buttons adjust the seat to the position you desire and
hold the MEM button down while depressing 1, 2, or 3.

Bob
--
The goal when driving is to miss the maximum number of objects.
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Old 08-29-2005, 07:01   #3 (permalink)
Mike F
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Re: power seat 94 850-Reset?

nacho7 wrote:
>
> My 94 850 passenger seat is not responding to the power controls. It
> will rise a bit and tilt forward a bit, but no forward or back. Memory
> button 1 seems to work. Is there a way to reset the memory? Maybe with
> the diagnostic LED system? Or does it require the Volvo OBDII reader?


If the memory buttons move the seat in ways the individual switches
won't then there's a problem with the individual switches. They're not
so easy to clean, but they can need to be resoldered to the circuit
boards where they sit.

--
Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)
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Old 08-29-2005, 20:01   #4 (permalink)
nacho7
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Re: power seat 94 850-Reset?

Mike F wrote:
> nacho7 wrote:
>
>>My 94 850 passenger seat is not responding to the power controls. It
>>will rise a bit and tilt forward a bit, but no forward or back. Memory
>>button 1 seems to work. Is there a way to reset the memory? Maybe with
>>the diagnostic LED system? Or does it require the Volvo OBDII reader?

>
>
> If the memory buttons move the seat in ways the individual switches
> won't then there's a problem with the individual switches. They're not
> so easy to clean, but they can need to be resoldered to the circuit
> boards where they sit.
>

Thanks for the input. I guess I will be pulling the seat out and
checking switches and motors for operation and continuity. B6 gave me no
codes at all-not even 1-1-1.
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Old 08-30-2005, 10:01   #5 (permalink)
byrocat
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Re: power seat 94 850-Reset?

Have an additional question on this topic.

I've gone through the exercise of setting the seat to where I want it,
and then pressing the MEM and 1 buttons to lock the position in place.

I seem to loose the setting if I shut off the car and then go away. I
come back, shift the seat away from where I want it and then press the
"1" button to reposition. Nada!

I assume that the memory that is used for this is probably fried, and
the line from the Marx Brothers (Groucho as the Doctor) applies.

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