D5 (2005 on) ECM-6820 and power loss

[EzekielKnobrott]

Hi all,

Been having some problems with my V50 D5 MY09 for a while now and finally got a VIDA/DiCE on it to discover this problem code.

In short it started as an intermittent power issue which is now a total turbo loss. No boost, doesnt even spool.

Cant find much on the net regarding similar issues(specifically the actuator) or codes so any advice would be appreciated!

Theres a thread on the V50 sub forum that hasn't bore much fruit either albeit just updated.

Screenshot of VIDA below.

[EzekielKnobrott]

Ran some live data and it looks as if the actuator is the problem.

Either a dead motor or jammed vanes maybe. Either way looks like the turbo is coming off at the weekend!

[IMG][/IMG]

[cheshired5]

Originally Posted by EzekielKnobrott

Ran some live data and it looks as if the actuator is the problem.

Either a dead motor or jammed vanes maybe.

What's made you draw that conclusion?

[EzekielKnobrott]

Originally Posted by cheshired5

What's made you draw that conclusion?

If you look at the blue line for actuator position its constantly at 100% signal which is constantly open, ergo no boost.

Running the actuator test in VIDA and the arm doesnt move at all, doesnt make a sound either.

Combine that with the live data and and the reported codes all pointing to actuator I think its safe to say the actuator motor is kaput or the vanes are jammed.

I'll take it off at the weekend and see if I can move the arm manually and bench test the actuator but I'm almost certain its the actuator.

[cheshired5]

Originally Posted by EzekielKnobrott

If you look at the blue line for actuator position its constantly at 100% signal which is constantly open, ergo no boost.

I see the static blue line but the engine is idling though as you can see from the almost static rpm and airflow so why would you be expecting any different with boost?

If you have a graph showing rising engine speed, fuel pressure and airflow but static boost, I'd take your point but that isn't currently the case.

Does the PWM signal stay at 100% when you rev the engine?
Have you tried moving the actuator using Vida and physically looking at the actuator mechanism to see what's happening whilst you do this?

There's only so much you can do looking at a screen.

[EzekielKnobrott]

Originally Posted by cheshired5

I see the static blue line but the engine is idling though as you can see from the almost static rpm and airflow so why would you be expecting any different with boost?

If you have a graph showing rising engine speed, fuel pressure and airflow but static boost, I'd take your point but that isn't currently the case.

Does the PWM signal stay at 100% when you rev the engine?
Have you tried moving the actuator using Vida and physically looking at the actuator mechanism to see what's happening whilst you do this?

There's only so much you can do looking at a screen.

This wasn't idle, the graph may appear like it doesn't move much but that was a 5 minute drive with taking it as high in the RPMs would allow, about 3500 in 1st/2nd and 2500 in 3rd/4th.

Don't think I can adjust the scale so it appears really tiny. The mass flow is a better indicstor of me revving/accelerating. The desired boost line should closely match the actuator position I should imagine and it's just static throughout.

[cheshired5]

Right well you can definitely adjust the scale so look into that for future data.

As I mentioned earlier, try moving the actuator with Vida.
If it won't move, look into the electrical side first to ensure power is available.
If there's an electrical fault, no amount of turbo removal and cleaning will fix that.

It's also not uncommon for the worm drive on the actuator to wear out.
This would mean a whole new turbo from Volvo as they don't sell the actuator separately or speaking to a turbo specialist who may have an alternative solution.

You have a few bits to eliminate before doing what you propose.
That's how I see it fwiw.

[EzekielKnobrott]

Originally Posted by cheshired5

Right well you can definitely adjust the scale so look into that for future data.

As I mentioned earlier, try moving the actuator with Vida.
If it won't move, look into the electrical side first to ensure power is available.
If there's an electrical fault, no amount of turbo removal and cleaning will fix that.

It's also not uncommon for the worm drive on the actuator to wear out.
This would mean a whole new turbo from Volvo as they don't sell the actuator separately or speaking to a turbo specialist who may have an alternative solution.

You have a few bits to eliminate before doing what you propose.
That's how I see it fwiw.

I ran the VNT test before any of this and no movement, no noise, nada. Manually moving it will be the next step when I can get under it tomorrow.

Even if the vanes were jammed I'd be expecting to hear the motor whirring furiously trying to move it.

Actuator motors are sold separately by various places and far cheaper to replace than the full manifold/turbo/actuator jobby. I've enquired with Hella and Garrett (as I'm unsure which unit it is yet as its still on the car) and they will supply new actuator units. If its a Hella which I suspect it is its a UTA so should present even fewer problems. Theres many reported problems with various Hella and Garrett units over heating and melting solder to grounding wires inside. Which is literally a 5 minute fix just soldering the connection back in place.

Failing all of that I'll open up the actuator and fault find and replace internal parts as necessary which are all available online fairly cheaply.

[cheshired5]

Sounds like it's all in hand.

[EzekielKnobrott]

Originally Posted by cheshired5

Sounds like it's all in hand.

Until I open the actuator, drop a tiny screw and lose it