[EdEire]

I also cleaned the maf sensor...and tried running it unplugged...no change....

Just to note the arm in turbo itself moves freely but you can feel like vacuum resistance on the actuator itself when you trying to open or close by hand... Like pumping air on the actuator if that makes any sense

 

[EdEire]

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

I have.... It gave me a test olan suggestion.... Steps...connection...plugs...and the real test when the ista is simulating the boost...opening and closing actuator... The actuator stays on nr2 and doesnt move at all so the test fails and advice me to replace turbo/actuator... Which i have done twice ..once actuator itself and second time turbo as whole unit... The arm moves freely on turbo side...on actuator as well with slight vacuum resistance...like pumping tire or so...but movable

 

[EdEire]

If you are 100% its not the actuator, I would be checking the wiring from the plug back to the DME plug. The fault code seems to be an issue with the status line. The ecu is unable to tell what position its in.

For what i could see it goes into the loom with maf and egr and then to ecu....

The actuator is not moving at all...not clicking...not moving when opening car/closing...not moving when driving and if i move it by hand it stays on the position.... Cables seems ok... Nothing damaged or burned or so

 

[EdEire]

If you are 100% its not the actuator, I would be checking the wiring from the plug back to the DME plug. The fault code seems to be an issue with the status line. The ecu is unable to tell what position its in.

When i unplug it ista register new error as actuator not present or so .. so i assume the plug isnt the issue... It register the actuator but unable to operate.... I am going crazy with this.... At this stage

 

[EdEire]

I do not have a circuit diagram but have you checked the fuses?

Yes ..F1 near ecu running few more bits then actuator 20amp..

 

[EdEire]

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.

You can not test the wiring....or at least i cant see the option....all i see is diagram...that i traced...all plugs are in and to me it seems fine...but for some reason its just not operating at all...not even clicking

 

[EdEire]

Well you can still check if the actuator is getting terminal 15 voltage and do a continuity test on the other connector cables back to the DME. Inspect the plugs on the DME for corrosion/water ingress. If all that is fine I wouldn't know what else to suggest other than scoping the pwm signals to the actuator and DME.

Will try tomorrow.....the actuator should have 5v i believe

 

[EdEire]

I do not have a circuit diagram. I have had a quick look at one for a diesel unit which is not your one. You say you have the diagram.

I guess you should have battery voltage on one pin, voltage supply from terminal 15 through the DME on another, ground on another and then pwm inputs and outputs. At a guess.

Yes diagram is there on ista+

Will run test tomorrow afternoon and come back

 

[EdEire]

Yes do let us know the outcome, how many pins are in the actuator plug?

5 pins ...

 

[EdEire]

Just a quick question? What happened when the original fault on the original turbo occurred? Did it just stop working? Or any intermittent problems before hand? Same code any other codes? Do you still have the original actuator at hand?

The original part had arm on turbo stuck...abd was not boosting...dont have it...binned it

 

[EdEire]

I was going to ask if you knew the hella part number on it? If the fault you are having now was not there on the original could it be possible you have fitted the incorrect part actuator?

Thats why i fitted whole turbo unit...just in the case

 

[EdEire]

Ok so you fitted the whole turbo that had the same actuator part number as your original. It was just a thought.

Do you have the second actuator at hand?

I first ordered actuator....i fitted...no change...returned actuator and ordered whole turbo....fitted and binned old as the vanes were stuck...it was 200e for the turbo.... It was matching car...and went to reputable bmw used parts...one of the best in country....

 

[EdEire]

New i have to manually adjust the actuator to suit....as if its wrong it gives me and overboosting error....so had to find position when i can drive the var without throwing an limp mode.... The car is flat but being driven daily...

 

[EdEire]

Note i got the car 6 months a go ... And i want to keep it for as long as i can ...

 

[EdEire]

I wonder if i can just test the actuator by plugging it on spare 12v battery...just to see if the actuator motor inside operates...and moves the arm....if so then i would have few possible issues but at least an answer.... 1. Connection issue or ecu issue...

 

[EdEire]

Yes do let us know the outcome, how many pins are in the actuator plug?

Pin 2 and 4 reading 11.8v
Pin 1 and 4 reading 11.8v
1 and 3 reading 1v
2 and 3 reading 1v


So there is power for sure

 

[EdEire]

Like I said previously I do not have the circuit diagram that you have in ista or what type of actuator you have on the turbo or if it is the correct one.

Are those values at the 5 pin loom plug with the actuator unplugged?
Can you post the wiring diagram that you get in ista?

Yes..... Just tried and hooked the actuator on 12v battery....working like a charm

 

[EdEire]

Like I said previously I do not have the circuit diagram that you have in ista or what type of actuator you have on the turbo or if it is the correct one.

Are those values at the 5 pin loom plug with the actuator unplugged?
Can you post the wiring diagram that you get in ista?

So actuator working when 12v in pin 1 and pin 2 present...actuator moving up and down respectively..... But on the car plug there is not power between pin 1 and pin 2 even under load..there is power in pin 1 and pin 4....will post the diagram now

 

[EdEire]

Yes do let us know the outcome, how many pins are in the actuator plug?