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  • Emerald k3
  • Emerald K6


This generic protocol can be enabled on Emerald K3 ECUís that have a firmware version v1.05 or higher.


Race Technology supply a cable that directly connects Race Technology equipment to the Emerald's Comms port. In case the cable cannot be supplied, pinout information for the communications port below:

Pin Number Connection Comments
1 CAN_H CAN bus interface
2 CAN_L CAN bus interface
3 - Not used
4 - Not used
5 earth Signal earth
6 - Not Used
7 Rx RS232 serial interface, data receive
8 Tx RS232 serial interface, data transmit
9 CTS RS232 serial interface, clear to send

Data Channel Listing:

ECU Message Name Race Technology Data Channel Resolution of Data
RPM RPM (Engine RPM) 1 RPM
MAP Boost pressure (pressure 5) 0.1 kPa
BARO Ambient air pressure (pressure 1) 0.1 kPa
TPS% Throttle position (aux 1) 1%
Coil on-time Coil 1 PW (measured time 9) 1 ms
Coolant temp Coolant temp (temperature 8) 1 oC
Road speed Speed from ECU (misc 4) 0.1 MPH
AFR/Lambda_1 Lambda 1 (misc 1) 0.1 lambda
AFR/Lambda_2 Lambda 2 (misc 2) 0.1 lambda
Status flags Auxiliary 1 (aux 26) 1
Error flags Auxiliary 2 (aux 27) 1
Injector duration Fuel inj 1 PW on (measured time 1) 1 ms
Gear Auxiliary 3 (aux 28) 1
Selected map Auxiliary 4 (aux 29) 1
Battery Battery voltage (misc 3) 0.01V

Not all channels listed in the table above may be available from your ECU. The available data channels vary with the vehicle model, year of manufacture & connected sensors.

Page last modified on February 19, 2021, at 12:42 PM