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Hi, first post, just wanted some advice.
My car has decided it doesnt like running. Drove it a couple of hundred miles, pulled into some shops, came back 5 mins later and it wouldnt start.
Plugged my diagnostics tool in and all seemed normal except for the high pressure fuel actual value which sat nicely at 0.
Attached are some pictures of live data of the fuel system with no cranking and then during cranking.
Anyone know good things to check like fuses relays? What could the fault potentially be?
Thanks.

Can you hear the low fuel boost pump at the back when you put the key ?
What engine is it ?

Its a 1.2 TDI, dont think i can, is there a fuse or relay for the low pressure pump i can test?

check fuse 3 ( small ones)

Fuses are all good, testing the fuel pump im getting no continuity/resistance across the two large pins on my fuel pump but i am getting resistance across the smaller ones, does anyone know what the designation for the pins are on the pump?
Cheers

It's very easy to to guess, I shouldn't I know, but, as you have considered, there will be a large +ve and a large -ve supply and return for the pump motor, and the typical fuel level device will be a resistor with a moveable (wiper) contact, so could explain the 3 smaller contacts.

So, I'd expect a low resistance across the 2 large contacts - like you seem to expect.

Regarding checking the fuel pump:



- Check fuse SB31, SB35, and J643 Relay (1).