Cupra 280 St blowing fuse when put in reverse

Dec 16, 2022
3
1
Hello,

I have a cupra st 280 and it keeps blowing a fuse when I put it in reverse. In the photo its the blue 15A fuse in the middle. I switch to a new one and it works for a day or so and then blows again. When it blows I get all kind of error messages on the display like acc, tpms, parking censors not working.

Is it possible that it has something to do with a coil pack? I had one or two misfires on one cylinder this summer. Thankful for any help.

1FE48648-FCF2-4A8E-82C0-1E476F6751BD.jpeg
 

Butty

Active Member
Sep 7, 2018
156
46
That's fuse SB34 and is for the Haldex front differential. There's two connectors to it under the car.
Presumably the fuse doesn't ever blow when moving forward?
The Haldex motor pump may be drawing too much current due to a poor connector, so check them for corrosion and being in place correctly.
Reverse must requires the pump to be in an usual condition to either fully lock or unlock the diff?

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1671272647378.png
 
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Dec 16, 2022
3
1
That's fuse SB34 and is for the Haldex front differential. There's two connectors to it under the car.
Presumably the fuse doesn't ever blow when moving forward?
The Haldex motor pump may be drawing too much current due to a poor connector, so check them for corrosion and being in place correctly.
Reverse must requires the pump to be in an usual condition to either fully lock or unlock the diff?

View attachment 34835


View attachment 34836
I will check the connectors asap. I always reverse out of my driveway and thats when the fuse blows, so maybe it will blow in drive aswell. Thank you for your help with the pictures and diagrams!
 
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