Hey All,
I recently purchased a 2011 e89 30i with electrical "issues". So far I found that the previous owner jumped fused 37,38,39,and 41 so that the corresponding output plug bypassed the k6300 relay. While this allowed the car to startup and drive, it did so without the power steering (and probably other modules as well). I "un-jumped" those lines so that the outputs could get their protected power from the fuse junction box as the good germans intended, but alas trying to start the car failed.
I confirmed that k6300 isn't getting activated after identifying the additional corresponding fuse outputs as being dead also (F11,16,&17 ; NOTE - These fuses where NOT also jumped with 37-41). I back-probed the incoming activation line (pin1 on connector X11010 White w/Brown stripe) and found 0V flowing through it. This led me to believe the issue originating from the incoming DME activation line. I traced the line all the way to the DME itself to validate no voltage from the source and sure enough, the DME isn't sending the required "negative activation" signal. I assume this means that I should be expecting -12V signal for the activation of the K6300 switch.
Given that the DME is indeed getting a valid wake up signal (testing the incoming Yellow Green wire for this), is it safe to assume that my DME is fried? Note that the car ran and drove indicating that the engine was at least receiving valid signals for fuel and spark control. Anything you can think of that might cause what I am seeing?
I recently purchased a 2011 e89 30i with electrical "issues". So far I found that the previous owner jumped fused 37,38,39,and 41 so that the corresponding output plug bypassed the k6300 relay. While this allowed the car to startup and drive, it did so without the power steering (and probably other modules as well). I "un-jumped" those lines so that the outputs could get their protected power from the fuse junction box as the good germans intended, but alas trying to start the car failed.
I confirmed that k6300 isn't getting activated after identifying the additional corresponding fuse outputs as being dead also (F11,16,&17 ; NOTE - These fuses where NOT also jumped with 37-41). I back-probed the incoming activation line (pin1 on connector X11010 White w/Brown stripe) and found 0V flowing through it. This led me to believe the issue originating from the incoming DME activation line. I traced the line all the way to the DME itself to validate no voltage from the source and sure enough, the DME isn't sending the required "negative activation" signal. I assume this means that I should be expecting -12V signal for the activation of the K6300 switch.
Given that the DME is indeed getting a valid wake up signal (testing the incoming Yellow Green wire for this), is it safe to assume that my DME is fried? Note that the car ran and drove indicating that the engine was at least receiving valid signals for fuel and spark control. Anything you can think of that might cause what I am seeing?
. Amazing to think the previous owner went to so much trouble with the workaround when it was just a bent pin. Sometimes you forget there can be an actual physical issue rather than software/electronics...
