Need help doing vanos test with INPA

[sapote]

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Originally posted by JBAshland View Post
10: Signal: Camshaft sensor, Exhaust
15: Camshaft sensor 1: Synchronization to Crankshaft.......

This means that the expected crank angle window/range when a rising/falling edge is expected isn't happening. In your case it might be caused by the missing signal from the error code above.

Tomba, If the EX cam was too advance, why the DME didn't just issue the timing error code instead of error 10 and 15 combo? There are distint codes for VANOS too retarded or too advance, but I rarely see the combo of 10 and 15. Also the poster confirmed that after re-timed the cam then the error 10 and 15 gone.

[alpinem3e46]

It expects to see 0 and yours is 38, meaning the intake cam is too retarded. Need to remove valve cover and double check the vanos timing on the Intake side.

How did you check the cam timing? Using the bridge tool?

I haven’t checked cam timing yet, the results from that vanos test are what made me think the intake cam timing is likely off. Unfortunately I am not sure what the previous shop that rebuilt the vanos did. The owner of this M3 tells me that it has had that code since the vanos work. I think my next step will be to order the timing tools and see if it’s in time.

Thanks again! I really appreciate your input.

[sapote]

I think my next step will be to order the timing tools and see if it’s in time.

no need to buy the tool for checking the timing. Do this: VC rempved, turn crank CW to TDC compression, #1 cam lobes should be pointing at each other at about 45* with the cam holes pointing close to vertical ref to the head top flat surface. remove the vanos IN piston front cover and the vanos piston should be about 1mm below the cover interface surface. in your case I believe the piston protrudes out quite a bit. To correct the problem, keep crank at TDC and with the vanos piston protrudes out, install the cover to push the piston back in at the max retard, loosen the hub bolts and proceed to set the timing such as the IN cam hole is 90* to the head top surface. run the Tool32 again to verify.
Note: the perfect timing set the hole not perfectly 90* to the head surface, but using 90* vertical is close enough for the job without the bridge tool.

[Tomba]

Tomba, If the EX cam was too advance, why the DME didn't just issue the timing error code instead of error 10 and 15 combo? There are distint codes for VANOS too retarded or too advance, but I rarely see the combo of 10 and 15. Also the poster confirmed that after re-timed the cam then the error 10 and 15 gone.

Good question,
I don't know the routines for the DME to trigger the error codes.
I would expect the DME to check a level / edge from trigger wheel between low and high or visa versa during a certain crank angle window to detect a working sensor.
Maybe the window is small and it can trigger both codes? Even in newer ECU I see these 2 codes sometimes together.

[sapote]

Good question,
I don't know the routines for the DME to trigger the error codes.
I would expect the DME to check a level / edge from trigger wheel between low and high or visa versa during a certain crank angle window to detect a working sensor.
Maybe the window is small and it can trigger both codes? Even in newer ECU I see these 2 codes sometimes together.

May be the error is too large, above certain threshold -- the IN cam was 38* retarded instead of 0 -- and this caused the DME to issue codes 10 and 15 combo.