It may help, in theory.. no harm in doing it.
The pump does activate breifly on ABS start up check.

Potentially yes, although tapping mine made no difference, they were that stuck.

just a note on this thread incase anyone else is googling and comes across this. I fixed the fault. It was the motor brushes stuck, therefore not supplying power to activate the motor. I found these Youtube videos very helpful: https://youtu.be/CmCe98MZ-Yw https://youtu.be/6m2H-nC0CqE It was a bit o...

Thanks guys. Sorry, I should have made a better introduction. Yes I am in UK. I bought a Lancer GS4 as a trade in at my work, its an ex CCR UK press car. Having scoured google for the same issues nobody has ever come up with a DIY fix it seems. Some useful info on that link Fearful1, thank you. I am...

Hi, Sorry to drag up this old chestnut. My same fault has been intermittent. Last 8 weeks it has been permanent. I want to fix it myself but can't find any info on what the actual failure is on the board. I can send it away for repair at a cost of £300 but if it's a simple reflow or component replac...