2.0L ECM

Vehicles equipped with the 2.0L Beta used the 2mbit SIMK41 up until the first facelift model (2005), when CVVT was introduced and 4mbit SIMK43 was used.

Memory layout

Both units memory can be separated into 5 sections:

• bootloader & UIF
• adaptive values
• calibration zone
• program code

Memory layouts per ECU

SIMK41 - 2mbit

Start	End	Section	Size
0	3FFF	Bootloader & UIF	16 kByte
4000	7FFF	Adaptive values	16 kByte
8000	FFFF	Calibration Zone	32 kByte
10000	3FFFF	Program Code	192 kByte

SIMK43 - 4mbit

Start	End	Section	Size
0	3FFF	Bootloader & UIF	16 kByte
4000	7FFF	Adaptive values	16 kByte
8000	FFFF	Program Code	32 kByte
10000	1FFFF	Calibration Zone	64 kByte
20000	7FFFF	Program Code	384 kByte

Description of memory sections

Bootloader & UIF

This section is 16 kilobytes in size and contains the boot code that initializes the ECU and verifies that everything is ok before control is handed over to the program code section.

This section also contains one time writeable data such as hardware identifier, manufacturer information and user information fields (UIF).

Offsets and data structure in the table below are shared across all variants.

Name	Offset	Size (bytes, decimal)	Example	Notes
KWP seed/key	0x3E01	4	0x58D8C848	Two bytes seed, followed by two bytes key
VIN	0x3E22	17		2.0 ECUs don't store VIN. Instead, sometimes there's a wildcard that narrows the VIN down to Tiburon models, sometimes it's just 'xxxxxxxxxxxxxxxxx'
Socket	0x3F70	2	0x5539 (ASCII: U9)	Value from the small sticker usually located on the ECU socket. Click for example with "U9" label
ECU family	0x3F80	8
Serial number	0x3F8A	50
Date (YYMMDD)	0x3F98	6?	0x303830333130 (ASCII: 080310 - 2008, March 31st)	Production/first flash date. This might/should be updated after flashing, might be updated after flashing with an official dealer tool - to be verified.