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      04-09-2024, 06:48 PM   #33
mikerunt
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Drives: M4GTS
Join Date: Mar 2023
Location: Austin

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Garage List
2011 BMW M3  [10.00]
2016 BMW M4 GTS  [9.42]
Quick update:
  • Ground straps are all fine
  • Fuses and relays are all fine
  • Battery at 13v
  • The car starts when it’s taken out of park lock (which is why it wasn’t starting before)
  • DCT harness connection checked and confirmed

The issue:
  • There is no communication with the DCT. Like at all. Can’t run any system tests or anything.

What could possibly be causing the DCT to completely disappear? I don’t want to jump and assume Mechatronics just yet - looking for other electrical errors that could possibly be causing this.

One note - I did disconnect my gauge cluster to move it and hide it up behind the dash but it was reconnected BEFORE the car had this issue. After I moved the cluster the car ran fine for 5 sessions on track before the issue. I moved this cluster with the Cartek kill switch in the car completely of.

The car also has an OTB Epic tune on the engine and trans. Could the trans tune have been weird? Again, was running fine with the trans tune up until this point?

Could this be a CAS issue? DME?
Appreciate 0