rusefi_documentation/Hellen-128-Mercedes.md

This development board is PnP for Mercedes with the 128 Pin ECU (M111 and M113 engine; late 90s-early 2000s. confirm your ecu)

Download release firmware Nightly firmware bundle

Ebay

Pinout & Google Sheet & Another Google Sheet

[Issue Tracker]

Schematics rev a

iBom rev a

Hardware features

Extension Pads (rev. a)

Pin	Type	Comments
	Outputs
P33	Bridge driver B	3 A peak
P34	Low side	0.5 A
P35	Low side	0.5 A
	Inputs
P30	Analog pull up
P31	Analog pull down
P32	Analog pull down
	MCU
J1	SPI, UART/GPIO	See schematic for details
	WBO1
J9	XH-8 WBO1 connector
P19	GND
P21	H-
P22	R Trim
P23	Ip
P24	Vs/Ip
P25	Vs
J7	SWD
	WBO2
J18	XH-8 WBO2 connector
P18	GND
P20	H-
P26	R Trim
P27	Ip
P28	Vs/Ip
P29	Vs
J19	SWD

Ignition jumpers (rev. a)

Vehicle	F2	F3	F4	F5	F6	F7	F8	F9	F10	F11	F12	F13	F14	F15	F16	F17
Connctor pin (NOT jumper designator!!!)	F4	F5	F6	F7	F9	F10	F11	F12	F13	F14	F16	F17	F18	F19	F20	F21
IGNx signal	IGN5	IGN5	IGN3	IGN3	IGN7	IGN7	IGN8	IGN8	IGN4	IGN4	IGN2	IGN6	IGN6	IGN2	IGN1	IGN1
4 cyl 2 coil	🟡	🟡	🟡	🟡	🟡	🟡	🟡	🟡	✔️	🟡	🟡	🟡	🟡	🟡	✔️	🟡
Other model	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?

🟡 - it doesn't matter, the specified pin is not connected

Coil type	R43	R59	R67	R60	R79	R66	R74	R62	R76	R63	R77	R64	R78	R65	R73	R61
Dumb	❌	✔️	❌	✔️	❌	✔️	❌	✔️	❌	✔️	❌	✔️	❌	✔️	❌	✔️
Smart	✔️	❌	✔️	❌	✔️	❌	✔️	❌	✔️	❌	✔️	❌	✔️	❌	✔️	❌