[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

 

[EdEire]

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

I am going to replace the plug next week and see ... But DDE.... What does it means?

 

[EdEire]

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?

Can i ask if you know

1. Would boost leak cause actuator not work?
2. What pressure reading is ideal? Should i retest it and do it under load? As i have dont it stationary...


As ista is telling me the cause of none operational actuator

 

[EdEire]

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

Wanted to ask

1. Whats ideal pressure is mine looking good?
Would not be better to test it under load?
2. Would boost leak cause actuator to not work?

This are suggestions by ista

 

[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.

 

[EdEire]

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.

Thats not going to be easy...but will try to tackle that tomorrow....
Could the wiring break not be on the plug itself?

 

[EdEire]

I will check the fuse again....or even replace it as i have new one there...i only checked the fuse visually.... F1 on diagram

 

[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

 

[EdEire]

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

Pin 1 to pin2 has 0.1V pin 1 and pin 4 has 11.5V

 

[EdEire]

And pin 2 with lin 4 has 11.5

 

[EdEire]

Sorry for confusion.... Pin 1 connected to pin 2 has 0.1V
Only pin 1 connected to lin 4
And pin 2 connected to pin 4 has power

 

[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

 

[EdEire]

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

Johny you are Godsent...i will check tomorrow.......will report back with finding...

I honestly appreciate your time and skill to explain to me the things i have to carry.
Have a good night.

 

[Criscarp]

Looks like the ground is missing from pin 2.

 

[EdEire]

Looks like the ground is missing from pin 2.

Chris is you have any tips please thorw it at me... Goong to work but will work on this puzzle in afternoon. I understand a little of te diagram...but dont understand it all.
Thank you

 

[Criscarp]

As been said from the beginning you need to check continuity of the wiring.

The ground is obviously missing so the actuator is not powering up thus the code 00449A no position signal back to the DDE. In the DDE/ecu box check the connector X6011 pin 7 should be zero volts

 

[EdEire]

As been said from the beginning you need to check continuity of the wiring.

The ground is obviously missing so the actuator is not powering up thus the code 00449A no position signal back to the DDE. In the DDE/ecu box check the connector X6011 pin 7 should be zero volts

Forgive me....but i literally bought multimeter yesterday...

I will run pin 1 and oin 2 against chasis as adviced and then check the resistance ..

With humble respect i would say with a little of more guide i can tackle any task.... Can you tell me...checking you mean the pin with ground/chasis if there is a power?

 

[EdEire]

And if you can....if the ground is missing ut means that the cable is broken somewhere or disconnected?

 

[Criscarp]

Pin 2 on the actuator is permanent ground(0 volts) from this pin the wire goes to connector X6011 pin 7 in the ecu box and then continues to chassis ground. Measure voltage at X6011 pin 7 should be zero. Check this connector for good connections.

Report back the voltage. Black probe on metal part of car body/engine, red probe on the connector

Yes looks like pin 2 of actuator is floating and not grounded/disconnected.

Try that first

 

[EdEire]

Pin 2 on the actuator is permanent ground(0 volts) from this pin the wire goes to connector X6011 pin 7 in the ecu box and then continues to chassis ground. Measure voltage at X6011 pin 7 should be zero. Check this connector for good connections.

Report back the voltage. Black probe on metal part of car body/engine, red probe on the connector

Yes looks like pin 2 of actuator is floating and not grounded/disconnected.

Try that first

Yeh...will do....will be afternoon before i get to it
... Ecu is sealed under couple screws....locating the connectorx6011 will be fun...is it looks like ramen soup inside the box... But i am confident that i can check that... Thanks a lot