I am trying to trouble shoot the DBW in an E40 system. At idle or even static both the Yellow (TB pin A) from PCM pin BLACK60 and Brown (TB pin B) from PCM pin BLACK 63 show constant 12V. Cycling the pedal does nothing. I see the 5V on the Purple (TB pin D) PCM pin BLACK 31 and LT BLUE/BLACK (TB pin E). These do not change voltage as the pedal cycles, but do change as the throttle plate is manually moved. I have tested the pedal sensor and it seems to be functioning correctly. If I remove the yellow wire from the TB and quickly ground the terminal the throttle blade does open for a moment. Any ideas?