The current ECU data displayed are:
- Battery voltage
- RPM
- MAP
- Spark advace
- Intake temperature
- Cooland temperature
- TPS
Schematic:
The first step was to discover which pcb traces were responsible for the communication between ELM327 and the bluetooth module.
And then cut those traces and wire them to the new board.
I had this as an idea once. Great find! I might start looking into my Autel scanner now