Foxflash Read and Write BMW EDC15C4 ECU via OBD on Bench

By | February 27, 2026

It’s a BMW 3D 184hp with Bosch EDC15C4 ECU.
Tried Foxflash Full mode but not working(connected everything as shown, measured cables, resistors, outputs everything with multimeter and it’s 100% fine but still no connection) – ERROR SEND WAKE.
Simulated OBD on BENCH via K-LINE ok.
READ – 5 min
WRITE – 2 MIN
ONLY FLASH PARTIAL READ!!
Checksum with winols.

foxflash bmw edc15c4 obd on bench 1 foxflash bmw edc15c4 obd on bench 2 foxflash bmw edc15c4 obd on bench 3 foxflash bmw edc15c4 obd on bench 4

If need to do it via full system mode, need to fix the colored rainbow cable!

Problem is rainbow cable inverted, you need to fix the cable.

fix foxflash rainbow cable