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Thread: P3348 Turbo Actuator doesn't move, new turbo and actuator installed too!!!

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  1. Unhappy P3348 Turbo Actuator doesn't move, new turbo and actuator installed too!!! 
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    Losing my mind with my 2008 Audi A6 3.0 TDI

    Fault code 3348 for turbo actuator, clear the code, instantly comes back

    Turbo and actuator has been swapped for a new recon unit from a specialist, pre-calibrated

    Turn ignition on, the inlet manifold actuators self test sweep, but the turbo actuator just doesn't move

    I've tried my old actuator, and a 3rd actuator, it still doesn't move (had it confirmed that they don't even need to be calibrated for the self test sweep).

    It's on a 20A fuse in the engine bay under the windscreen, this fuse is good and everything else on the circuit works fine

    Everything else on the circuit has been unplugged, no change

    There's 4 pins on the turbo actuator plug:

    Pin 1 - Ground
    Pin 2 - Switched 12v live
    Pin 3 - Goes to ECU
    Pin 4 - Goes to ECU

    I've even cut the plug off and have properly crimped a brand new plug end on

    I've checked pin 1 and pin 2, 12v fine

    I've tested continuity on pins 3 and 4 from both ends and this is absolutely perfect, 001 reading on the multimeter

    I've cleaned the pins on the ECU with a dental teepee brush (they were already spotless but worth a shot) and sprayed contact cleaner

    When I scan with VCDS the only change I get with the code is if the turbo actuator is plugged in or unplugged. Unplugged I get a duty cycle of 0.4% and plugged in I get 20.5% (I'm guessing this is proving pins 3 and 4 are good which go to the ECU?)

    At a loss with it, the only thing I can think is that the ECU may be at fault, but everything else is working fine and I can't find anything online with ECU problems like this

    Any clues guys?

    Thanks
     
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  2. Re: P3348 Turbo Actuator doesn't move, new turbo and actuator installed too!!! 
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    I believe you require a turbo actuator the code p3348 points to actuator a common fault. When you say you checked pins 1 & 2 were you saying you had 12vs at each pin. is your engine bng
     
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  3. Re: P3348 Turbo Actuator doesn't move, new turbo and actuator installed too!!! 
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    Quote Originally Posted by mickeybo View Post
    I believe you require a turbo actuator the code p3348 points to actuator a common fault. When you say you checked pins 1 & 2 were you saying you had 12vs at each pin. is your engine bng
    I've just fit a new turbo which came with a new pre-coded actuator.

    No, I had 12v testing pin 1 and 2 together.

    Pin 1 is ground, pin 2 is 12v.
     
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  4. Re: P3348 Turbo Actuator doesn't move, new turbo and actuator installed too!!! 
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    The only people I have found that can do this is Midland Turbo.
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
    !


     
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