Kia Hyundai SIM2K-240 241 141 245 251 Bootloader Wiring Diagram

If you need to read Hyundai/Kia sim2k-240 sim2k141 sim2k241 sim2k245 sim2k251 ecus in bootloader mode, pinout will be a very good starting point.

Here comes the wiring diagram for sim2k-240 IROM TC1767

Information

BSL130	no
BSL131	yes
BSL132	no
BSL-ADP	not required

Or check pinout from dimsport

This ECU can be read by ktag using the continental sim2k240 Hyundai driver

PCMTuner/KTM Bench/ PCM Flash reads no problem.

If it shows a checksum verified error when save file, it saved though, don’t worry, it will still calculate correctly when writing.

Module 50 for

2.0L, 2.4L (SIM2K-140)

2.0L, 2.5L (SIM2K-D160)

2.0L, 2.4L (SIM2K-141/142/341)

2.0L (SIM2K-C201)

2.0L, 2.0T (SIM2K-240/241/242/245)

Supported: Reading, Writing, Checksum Correction.

SIM2K-140 and SIM2K-141 have similar pinouts.

Siemens SIM2K-140/141/341/D160 on the desktop (large connector) :
1,3,5 – ECU Ground (just connect one of the contacts)
77 – CAN-High
78 – CAN-Low
76 – K-Line
2 – + 12V (ignition on)
4 – + 12V (main relay power supply)
6 – + 12V (unswitched power)
64 – output of the main relay control

Note that when working with the SIM2K-140/141/341 / D160 on the desk, it is absolutely necessary to connect the relay via the control output of the main relay (64th computer contact). Otherwise, the firmware recording operation may not succeed.

Siemens SIM2K-241 on the desktop (smaller connector) :
1,2,4 – ECU Ground (just connect one of the contacts)
77 – CAN-High
60 – CAN-Low
3,5,6,75 – + 12V (main relay power supply)
41 – + 12V (ignition on)
58 – + 12V (unswitched power)
53 – output of the main relay control