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  • Gems EM40


Connect to ECU mapping software and go to: Telemetry > CAN Telemetry Setup...:

Using the image below select the channels in the correct order then click Show info and confirm it matches the table in the image.


This ECU should be connected via CAN connections:

Race Technology supply a cable that directly connects Race Technology equipment to the Gems E36 communications port. In case the cable cannot be supplied, pinout information for the communications port below:

9 Way D-type socket for communication with PC:
PIN NO    
1 CANL Option
2 TX Standard for PC serial RS-232C
3 RX Standard for PC serial RS-232C
4 BUSB Option RS-422
5 GND  
6 CANH Option
7 BUSZ Option RS-422
8 BUSY Option RS-422
9 BUSA Option RS-422

Data Channel listing

ECU Message Name Race Technology Data Channel Resolution of Data
RPM50 RPM (Engine RPM) 50 RPM
Air temp Ambient air temp (temperature 1) 1c
Coolant Coolant temp (temperature 8) 1c
Lambda 1 Lambda 1 (misc 1) 0.008 Lambda
Gear Auxiliary 1 (aux 26) 1
Fuel 1 PW Fuel inj 1 PW (aux 6) 1us
Fuel 6 PW Fuel inj 6 PW (aux 11) 1us
Road speed Auxiliary 2 (aux 27) 1 MPH
Throttle Throttle position (aux 1) 0.40%
Lambda 2 Lambda 2 (misc 2) 0.008 Lambda

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 03:44 PM