Hi,
Today I reinstalling some covers under the globebox when I see a device that is not on the haynes manual, It seems a electronic module but really I dont know what it is. Does anybody knows what for is it?

Please the photo

Edwin

The irony of this is my Haynes manual does show this, but mistakenly identifies it as an "aftermarket ECU".

Well, it is an aftermarket Electronic Control Unit. Dana is not Volvo, Bosch, or Hella.
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Don Foster (near Cape Cod, MA)

Yes, a different Dana division, but they supplied differentials to the plant in Torslanda so why not cruise brains? Don't know absolutely for sure, but I suspect the dealer did not add these here; the owners manual has the use and adjustment too well integrated. It goes too nicely with the three-tiered throttle spool and the mercury switch is always exactly in the same place, etc.

On the other hand, the circuit looks the same as those aftermarket kits I used to put on my cars in the '70s, and they still need too much vacuum to work full throttle up the mountain. Beats me how it can be anything but an annoyance on a turbo without supplemental storage or pump.
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Art Benstein near Baltimore

You could just run a tube to your mouth. Suck hard, as appropriate.
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http://www.fidalgo.net/~brook4/oilslubesfilters.html

I'd tire of that.
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Art Benstein near Baltimore

Yup it does not work that well on a Turbo. It will only open the throttle until the turbo boosts the manifold pressure to atmospheric. So, it often will not maintain speed up a hill. I got a spare heater control resevoir that I am going to try hooking up to it to see if that helps. I am pretty sure the unit on mine ewas dealer installed. It has a seperate manual, and I can't believe Volvo would have put on units from the factory that worked so badly. On the other hand I can't believe that a car that cost as much as a new 240 turbo did not have standard cruise control.

Don't know about turbos of any manufacture, but the wide open throttle limitation of cruise control was the same on any other car I can recall. I used to travel and rent a lot-- sometimes they'd give me luxury cars I guess to save the sensible ones for the less frequent renters. I think I was being picky because a friend had a 64 New Yorker that used a complicated servo motor with magnetic clutch instead of the usual vacuum servo. He judged its ability to keep a set speed within parts of a mile-per-hour.

Only reason I ever set the cruise is to see if it does a better job at economy than my foot does. Don't think it makes much difference.

I've been keeping my eye out for the 12V vacuum pump that comes on the 90's cars with cruise. Next time I see one in the boneyard... I was thinking it would be cute to see the cruise have the strength to downshift up the long grades.

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Art Benstein near Baltimore

Cruise control. Now you know where to adjust it if you cc isn't working properly.

I believe that is the dealer installed cruise control unit. I took one just like it out of an 82 last summer.

Thanks!

Edwin