M5 Expert (>4000)
Join Date: Oct 2010
Location: Cobourg Ont
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Now you have me totally confused. I am not seeing any exhaust Vanos codes although I do see some intake codes and I see that INPA has two different readings for the position of the cams. Those BTW are exhaust as INPA does not show the intakes.
Although the voltages look totally wrong to me it depends on your meter because the Volts are really 12v but pulsed, on my meter I see much higher voltages but scaled they would be about the same.
First you need to understand how the DME moves the piston when it wants to change the valve timing. It appears to open both inlet and outlet noids at the same time but at different bandwidths. To you the difference in bandwidth will show as different voltages. Although the 1.4v for the inlet makes no sense to me half that voltage for the outlet would be normal.
Not sure why you see any volts on Bank two because the DME is not adjusting the valve timing, but It could be a meter thing not sure. The vanos solenoids are only fed volts when the DME wants to move the timing. Under load while going through the gears you may see constant voltages because the rate of exhaust returned would always be changing, but at a constant load the EGR/Vanos is very stable.
So what I am seeing is the DME is trying to move the exhaust timing on bank 1 but it is not moving. We knew that though.
I just looked at my meter and I have a setting for ECU volts that might be why I see different volts than you. My meter is a Automotive meter and that scale may have a different circuit for reading pulses.
As I write I think I might be understanding the codes I am seeing but I am still a little puzzled. I assume you had some stuff unplugged? I still don't see why we don't have a code for the intake advanced valve or any codes for the exhaust, might be because you have the meter plugged into them but.... I have no clue.
This is the reason you back probe and don't unplug things. Because the signal is not always on to the noids if they are not plugged in then you will always have the DME trying to move the timing. Which brings me to... If you unplug bank 2 and start the car you should see similar volts as you are reading on bank 1 because the DME should be trying to move the timing because the timing should fall back to 0.60 when the engine is shut off.
Also where are you hooking the ground for your meter when doing these tests? You should try the pin on the board and another location like the body and confirm the readings are the exact same.
Last edited by Sailor24; 12th January 2017 at 02:49 AM.