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Old 05-19-2019, 08:04 PM
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Help - Valvetronic Electric Issues

Well, this is interesting.

X5, 4.8, 2007, I am getting the following codes:

002A69: Valvetronic actuator motor: power supply
002A6B: Valvetronic power limitation


Engine was starting and in severe limp mode.

Then, I did the following:

Replaced the valvetronic motors on each bank. Install went fine. I did follow the TIS directions for e70 located here: https://www.newtis.info/tisv2/a/en/e...e-gear/BXdnwTe

This document says unscrew and screw back on, so that's what I did.

I did have to manually turn the actuators full counter clockwise. Engine starts; same problem.


I also replaced the two relays on valvetronic: K6319a and K6317.
Located here: https://www.newtis.info/tisv2/a/en/e...tronic/dHmuaCP

I also replaced the 40amp fuses in the Engine Bay - all good.

I checked most of the wiring from the actuators to the relays - looks fine.

Tried to start again. Same codes keep coming back. I think I hear the driver's side actuator spinning when I turn car off, but not the passenger's side. Is it possible the eccentric shaft is stuck? Or there is a mechanical bind somewhere?

I've hooked it up to ISTA+ too. Same codes. Going through the procedures there, it's verified the car it running on throttle only - hence the reduced power mode. I was able to query the valvetronic module. Althought, I'm not sure if that means much.

My next look is at the IBS cable. I did swap the battery with a known working batter from x5m. I did text the battery. It's good.


Any thoughts or help? Thanks.
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Old 05-20-2019, 12:41 PM
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Did you recently have an oil service? Correct oil and filter used?


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Old 05-20-2019, 03:33 PM
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Good point; I thought the same. I drained and filled the oil today, fresh filter, etc. Same error codes.


I'm thinking it could be the power distribution box (the large red thing on top of the battery). According to the wiring diagram, the valvetronic is powered directly from there. Thoughts??


See attached for the inside of the power distribution box. BMW claims the black circuit/board are fuses. They don't look like it to me. How do I go about testing this board?

Last edited by pjfox23; 05-20-2019 at 06:05 PM.
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Old 05-20-2019, 06:05 PM
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Old 05-20-2019, 06:34 PM
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Have you let your Valvetronic motors calibrate for a couple minutes before starting? Key in, button pushed without starting?


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Old 05-20-2019, 08:14 PM
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There would likely be additional issues if your battery cable were faulty.

Those are fuses but they aren't designed to be replaceable.
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Old 05-20-2019, 08:30 PM
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Quote:
Originally Posted by josiahg52 View Post
There would likely be additional issues if your battery cable were faulty.

Those are fuses but they aren't designed to be replaceable.
I suspected as much. Reading a TIS document now that states, "fusible links (non replaceable)" as the BMW term.

I will order a new power box and report back.
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Old 05-22-2019, 08:11 PM
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Powerbox changed; same problem.

I am out of ideas at this point.

I will recheck all the wires, and I guess the valve cover is due on this x5.

So, when I get the covers off, I will check for physical blocks and replace the eccentric sensors.
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Old 05-22-2019, 08:21 PM
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You said the wiring “looks fine.” Did you test the wiring for power with a voltometer to make sure the Valvetronic motors are getting power?


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Old 05-22-2019, 08:47 PM
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Quote:
Originally Posted by pjfox23 View Post
How do I go about testing this board?

Just an ohmmeter. They should be 0 ohms. Or a voltmeter, if the one side is connected to the battery, it will be the same on the other side
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