Help to repair ABS unit Bosch to Rover 75

[soxten]

I have a Rover 75 with a broken ABS unit.
Bosch 0265800001
Fault is that abs pump is working all time.

I have open abs unit and check solder and broken wire but all is ok!

Do some one know how to find this fault and if it possible to repair?









Christian Johansson via Iphone 5s

[Zmann]

there are motor driver mosfet's under al block

[Meat-Head]

Somebody else had this, good excuse to dk search MOSFET (metal oxide seminicenducter, field effect transistor ?)

[obdsystems]

Surprised can do anything with this as hybrid pcb

[soxten]

Obdsystem, i don't understand you?
Hybrid pcb?


Christian Johansson via Iphone 5s

[Meat-Head]

He means this abs is like trying to solder to a porcelain toilet, rather than real curcuit board

https://encrypted-tbn1.gstatic.com/i...eDeJ1PNZabMnSZ

[soxten]

Thx Meat-Head, but my pcb is not as the one on you'r picture.
My is a one with angel gold hair and gel over it.


Christian Johansson via Iphone 5s

[Meat-Head]

Thx Meat-Head, but my pcb is not as the one on you'r picture.
My is a one with angel gold hair and gel over it.


Christian Johansson via Iphone 5s

This is what obdsyetems means, I have an ecu the same gold and gel and destroyed it by touching by accident

[soxten]

Ok
No mosfet transistor under those 2 aluminium boxes?
It's hard to find a way to separate abs unit, metal pin ar welded...


Christian Johansson via Iphone 5s

[Meat-Head]

Blair 11094 Premium Spotweld Cutter with Standard Pilot | eBay

[Zmann]

Ok
No mosfet transistor under those 2 aluminium boxes?

----------------------!
Bosch_TO-220.jpg

[obdsystems]

That looks possible - but have you destroyed any wires to that pcb board ??

See the PCB itself is not designed to be repaired as its not like a conventional pcb - ie open up you computer.


Thanks ZMann - i take it you've successfully repaired these

[soxten]

The pcb with angel gold hair is not possible to fix/solder.
(not by normal tools)

I repair many Vw abs when alu wire is broken.
Microscope and no shaking hands is method to solder new wire to pcb.

Normal pcb is often bad solder problem so they are no problem.

But this Rover is a h*ll...

Zmann, how do you take a part those aluminium boxes?



Christian Johansson via Iphone 5s

[soxten]

This mosfet transistor is dead, no ohm on any pin
Do someone know what sort this is so I can order a new?

Is it posible to solder the new one back or do I need to weld connections?

Thx all as helping me!!!





Christian Johansson via Iphone 5s

[soxten]

A mini grinder and a microscope to disconnect this.





Christian Johansson via Iphone 5s