[Johnnyroper]

Have you run ISTA test plan to see what that indicates the problem is?

 

[Johnnyroper]

Get the test plan up again to have the circuit drawing so you can test wiring back to DDE, just because ISTA logs fault doesn’t mean the wiring is ok. There’s wiring for movement and also wiring for position feedback.

 

[Johnnyroper]

So long as you have 12v at pin 1, good ground at 2 and 3 & 4 continuity back to DDE is good then it can only be the DDE at fault.

on live data what is the boost pressure pre and post starting?

 

[Johnnyroper]

Control unit tree- select DDE- call up functions

 

[Johnnyroper]

So it’s showing DDE is requesting boost but boost not being delivered, which you know as actuator not moving.

I think if wiring checks fine then it’s a problem internally with DDE

 

[Johnnyroper]

Why would you replace the plug? Don’t see any need to replace it unless its
DDE is digital diesel electronics….. ECU in non BMW speak.

I can’t see it being a boost leak, a leak could account for low boost pressure but not the actuator failing to move. It would still move to max boost position when starting and remain there until boost needed controlling.

the live data is telling you the command for actuator is there but it’s not moving. It can only be losing output from DDE or there’s a wiring break. You need to 100% confirm wiring continuity pins 3 and 4 back to DDE,pin 1 has 12v and pin 2 has good earth.

 

[Johnnyroper]

Unlikely to be within the plug, if there’s a wire break it’s usually where it passes over or round engine parts etc. as you have circuit drawing it’s an easy thing to check with a multimeter. Also the fuse is easy to check,if you measure 12v from pin 1 to pin 2 that proves the fuse and also the earth.
You would then just need to resistance check pins 3 and 4 back to X2411 plug at DDE,also check them to earth with x2411 unplugged. ISTA wiring diagram should give you the info which plug is which at DDE

 

[Johnnyroper]

Measure pin 1 to a body earth see if there’s 12v, you will probably need ignition on.

Measure pin 2 to a body earth using resistance, you want to see 0 ohms

 

[Johnnyroper]

**** sake what kind of clown manages that, shame you didn’t check the wiring before changing turbo and actuator.
at least it’s sorted now

 

[Johnnyroper]

Sorry was running ista+ and testing it... hallelujah.... Actuator working like a charm...and helll...i forgot how the car felt... Finally...


And i found how it happen..a guy fixing the real issue with actuator uplugged the plug and managed to bend the pins...why or how i dont know... But having said that i had actuator issue...innitially as the vanes were stuck and the arm coudlnt move ...


Would you mind and send me your revolut or paypal i own you abd Johny bier or two.... Please dont let me beg yous

Don’t talk silly I come on here to help if I can and don’t want any payment.