08 · Comms
CAN & Core EFI dash
A1 / A2 are the CAN pair. The Core EFI 7-inch dash speaks the Core EFI protocol on this bus. 120 Ω at each end.
Physical layer
Twisted pair, CAN H A1, CAN L A2. 1 Mbit/s is the Core EFI default. A 120 Ω terminator belongs at each end of the bus — inside the dash and inside the ECU, or as a plug-in resistor on the last device.
Core EFI 7-inch dash
The Race Shop 7-inch dash listed as ‘Core EFI Protocol’ is the matching unit (the non-Core protocol dash is for Haltech / ECUMaster / Link / AEM). Power the dash from a fused ignition feed, ground it to chassis, CAN H/L to A1 / A2. Enable the dash broadcast in TunerStudio.
USB for tuning
TunerStudio talks USB, not CAN. J2 (D−, white) and J1 (D+, green), or the internal micro-USB. Shielded cable, one ground between laptop and ECU — the USB ground.