Bench connection How To
Read and write Siemens MS43/MS42 ECU
Here is the little tutorial.
First of all, get a K+L adapter
The white 2 pin connector has “L” and “K” pin identifiers and the black 2 pin connector,“+” and “-” which should be power and ground
1) Remove ECU from car. 2) Screw 4 torx bolts from case and extract mainboad.
3)Locate 104 boot pin
4)Short boot pin to GND 5)Put “+12V” and “-” to your black (2 pins) socket connected to cable 6)Connect K-line from white (2pins) socket to ECU 7)Connect power to ECU
Note: If you use the K-line pin.
1)L-line no need 2)12V and GND is direct power source to black (2pin) and to ECU (4/7 and 26)
After 6 Seconds (from power connected) remove wire between 104pin and GND. ECU now in bootmode and you can “connect”