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Car Forum / Volvo Cars / February 2005

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'95 850: Fixed the AT and broke the cruise control

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Stephen Henning - 06 Feb 2005 01:32 GMT
I have been posting about how my AT would generate an error when I
shifted down into "3" while descending a hill and it would cause the
dreaded flashing yellow arrow and the check engine light.  On the eighth
trip to the shop, with the sleuth of Mike, they replaced the pnp switch
on the AT and now that problem is fixed.

However, now the cruise control doesn't work.  I checked the cruise
control fuse and it is OK.  Is there some obvious relation between the
AT and the cruise control or a reason why working on the AT could kill
the cruise control?

I told the dealer about it, but haven't scheduled to take it in yet.
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Cheers, Steve Henning in Reading, PA, USA
   Owned '67,'68,'71,'74,'79,'81,'87,'93,'95 & '02 Volvos.
   The '67,'74,'79,'87,'95 and '02 through European Delivery.
 http://home.earthlink.net/~rhodyman/volvo.html

Glenn Klein - 06 Feb 2005 02:29 GMT
> I have been posting about how my AT would generate an error when I
> shifted down into "3" while descending a hill and it would cause the
[quoted text clipped - 8 lines]
>
> I told the dealer about it, but haven't scheduled to take it in yet.
Look under the battery there is a vacuum pump check to see if any vacuum
lines are off

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  "*-344-*Never Forgotten"
Is for the New York City Firemen who lost their lives on September 11,2001.
The official count is 343, but there was also a volunteer who lost his life
aiding in the initial rescue efforts. And I will never forget them as
long as I live,
nor should any American.

Stephen Henning - 07 Feb 2005 17:52 GMT
I wrote:
> > ... now the cruise control doesn't work.  I checked the cruise
> > control fuse and it is OK.  Is there some obvious relation between the
> > AT and the cruise control or a reason why working on the AT could kill
> > the cruise control?

> Look under the battery there is a vacuum pump check to see if any vacuum
> lines are off

I looked around the battery but couldn't see much so I can't verify this
problem.  I will be scheduling to take it in this week.
Signature

Cheers, Steve Henning in Reading, PA, USA
   Owned '67,'68,'71,'74,'79,'81,'87,'93,'95 & '02 Volvos.
   The '67,'74,'79,'87,'95 and '02 through European Delivery.
 http://home.earthlink.net/~rhodyman/volvo.html

Stephen Henning - 14 Feb 2005 15:46 GMT
> > I have been posting about how my AT would generate an error when I
> > shifted down into "3" while descending a hill and it would cause the
[quoted text clipped - 10 lines]
> Look under the battery there is a vacuum pump check to see if any vacuum
> lines are off

When I called the dealer to make an appointment to bring it in and
suggested that they may have forgotten to connect a hose or wire, they
told the mechanic and he said   "oops, I forgot to reconnect a hose.
Bring it in and it will only take a couple minutes to fix it."

Thanks much.

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Pardon my spam deterrent; send email to rhodyman@earthlink.net
Cheers, Steve Henning in Reading, PA USA
http://home.earthlink.net/~rhodyman

Per Hauge - 06 Feb 2005 10:12 GMT
>I have been posting about how my AT would generate an error when I
> shifted down into "3" while descending a hill and it would cause the
[quoted text clipped - 8 lines]
>
> I told the dealer about it, but haven't scheduled to take it in yet.

While the PNP switch allows the starter to engage when the the switch is
closed, it will at the same time turn off the cruise control module. The
cruise control will turn on again when the PNP switch is opened.
So - yes there is some obvious relation to the work done. Maybe the PNP is
permanently closed, even letting you start while in Drive position.

Regards

Per hauge
Stephen Henning - 07 Feb 2005 17:50 GMT
> While the PNP switch allows the starter to engage when the the switch is
> closed, it will at the same time turn off the cruise control module. The
> cruise control will turn on again when the PNP switch is opened.
> So - yes there is some obvious relation to the work done. Maybe the PNP is
> permanently closed, even letting you start while in Drive position.

I checked the starting while in drive and that doesn't work so I can't
verify this problem.  I will be scheduling to take it in this week.
Signature

Cheers, Steve Henning in Reading, PA, USA
   Owned '67,'68,'71,'74,'79,'81,'87,'93,'95 & '02 Volvos.
   The '67,'74,'79,'87,'95 and '02 through European Delivery.
 http://home.earthlink.net/~rhodyman/volvo.html

 
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