rusefi_documentation/Hardware/rusEFI-Wideband-Controller.md

NOTE: This is currently under development. This page might be wrong or change quickly.

Pinout

Pin Number	Function	Notes
1	Ground	Connect to chassis ground
2	LSU Ip	Connect to sensor pin 1
3	LSU Heater -	Connect to sensor pin 3
4	LSU Heater +	Connect to sensor pin 4
5	No connection
6	12v Supply	Connect to fuel pump supply or independent relay controlled by ECU
7	No connection
8	LSU Vm	Connect to sensor pin 2
9	LSU Rtrim	Connect to sensor pin 5
10	LSU Un	Connect to sensor pin 6
11	CAN H	CAN bus high
12	CAN L	CAN bus low

LED decoding

Blue LED	Green LED	Meaning
off	fast flash	sensor warming up
off	slow flash	Sensor hot, operating normally
flashing	off	See error code table below
alternating	alternating	Bootloader, see below

Firmware Update

rusEFI own wideband module requires one time initial programming. Self contained version of the board relies on custom USB header while module integrated into Hellen requires usage of ST-Link programmer hardware via TC2030 or breakout SWD pins.

initial programming binary at https://github.com/mck1117/wideband/tree/master/for_rusefi

At the moment only known to work using stm32cube software not ST Link utility (weird). In case of Hellen 5v via USB is required.

Error Codes

Green LED off and blue LED flashing indicates an error. The blue LED will blink a certain number of times, with a 2 second pause, then repeats.

Blinks	Meaning
3	Sensor failed to heat up within 30 seconds
4	Sensor overheated after entering closed loop mode
5	Sensor unexpectedly cold after entering closed loop mode (bad wiring?)

Bootloader LED Codes

Blink pattern	Meaning
alternating slowly	Firmware integrity check failed, please retry firmware upgrade.
alternating quickly	Waiting for bootloader entry command, only occurs for ~1 second before launching firmware

Source Code

The hardware and software source code are hosted here.

Index Selection

https://github.com/mck1117/wideband/issues/11