850 Ecu

**Goof** · Monday 7th March 2005, 23:16

Is the ECU the same for an Auto and Manual box?, or is there a difference???

**Bracer** · Tuesday 8th March 2005, 09:00

Different

**glock19** · Tuesday 8th March 2005, 15:17

Hardware could be the same, the software is different and for Auto, there's another Control Unit. Altogether, there could be three in the plastic box - TRAC/ECU/AUTO. Feel free to correct me if I'm wrong ....

**Bracer** · Tuesday 8th March 2005, 15:49

Originally Posted by glock19

Hardware could be the same, the software is different and for Auto, there's another Control Unit. Altogether, there could be three in the plastic box - TRAC/ECU/AUTO. Feel free to correct me if I'm wrong ....

Ok I will. lol

Yes the Engine ECU hard ware is the same and yes there is a seperate ECU that controlls the Auto box but the Engine ECU softare is different as its programmed to work with the Auto Box ECU.

The Tracts is part of the ABS ECU which is mounted on the passangers side of the engine bay and is linked back to the Engine ECU.

But the easyist thing to do is check to see if the ECU numbers match.

For example

And now My ECU Numbers

Hope this helps

**volvotuning** · Tuesday 8th March 2005, 16:17

Actually, the ECU hardware is also different for the autos, as well as the software. ie, an auto ECU has different hardware circuitry to the manual ECU.

Adam.

**Bracer** · Tuesday 8th March 2005, 16:20

Originally Posted by volvotuning

Actually, the ECU hardware is also different for the autos, as well as the software. ie, an auto ECU has different hardware circuitry to the manual ECU.

Adam.

I bow before te "Adam the Great"