New battery and alternator, van won't start

[Deak22]

Also managed to totally clear all the codes for the 1st time but the p056200 came back...

 

[Deak22]

Should add the video was taken with a jumper pack on the battery cos as I said it was draining so quick

 

[mmi]

SB32 30amp ignition off 11.7
Ignition on 0.0

It wasn't a typo but could've been a misread mate, defo read 0.0 but then tested it again later and it read 11.6.

Sorry, I meant that ignition off was 11.7 and when ignition on it was powered off - should be the other way = ignition OFF nothing, and ignition ON about 12 V (battery voltage) to make ECU work.

But there's a massive draw on the battery.

Strange - can you verify it by measuring (e.g. clamp meter on battery cable).

Tested the J329 relay as well, also fine.

J329 is not related to ECU. The ECU is fed via relay J271 (supplying ECU via fuse SB32).

 

[Deak22]

Think I've found the cause of the battery draw... When I turn the van over the key stays in position 2 and continues cranking when I loose it, guess the starter motor is staying engaged causing he draw. Any idea what would make this happen? But surely that wouldnt cause it not to fire up?

 

[Dundee_Kev]

That's normal. If it were to fire, the ECU would disengage the starter. It will only run the starter for so long, then when it realises it ain't going to fire it will cut the power to the starter.