BMW 320D limp home mode

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Greg.H
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Joined: Mon Mar 18, 2013 5:30 pm

BMW 320D limp home mode

Post by Greg.H » Sun Apr 07, 2013 8:48 am

Hi
Vehicle is BMW E90 320D and has a hard fault in memory what i can't reset with KOEO.Trouble code is 44cc Turbo charger regulator valve and the car goes in limp home mode at WOT.It's got a brand new turbo charger on it so can not be sticky vanes.
Does anyone know what's the blue channel on this waveform?4 wire type turbo actuator what is fitted directly on turbo charger.

Brown:power
Green:ground
Red:PWM duty cycle controled ground.on time increase with higher boost pressure
Blue:??????????
Attachments
Turbo actuator 2.psdata
4 wire type turbo actuator
(4.73 MiB) Downloaded 300 times

mteste03
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Re: BMW 320D limp home mode

Post by mteste03 » Sun Apr 07, 2013 11:24 am

Hi,

Is the actuator moving freely? Where did the new turbo come from?

Matt

Greg.H
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Posts: 28
Joined: Mon Mar 18, 2013 5:30 pm

Re: BMW 320D limp home mode

Post by Greg.H » Sun Apr 07, 2013 5:34 pm

Hi

Yes it moves freely.it's an aftermarket unit but requested boost pressure match with actual up on WOT.

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