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EMERALD K3, K6, and M3D ECUs

The Emerald K3, K6, and M3D ECUs output data at 19200bps. When connected to the Race Technology ECU decoder the following channels are decoded:

Byte ECU Name Race Technology message Race Technology Default name Race Technology VAR number Resolution
1 Engine Speed Engine RPM RPM VAR_0010 25 RPM
2 Throttle position aux 1 Throttle position VAR_2000 0.1%
3 Manifold pressure pressure 5 Boost pressure VAR_3504 0.1 kPa
4 Ambient Air Pressure pressure 1 Ambient air pressure VAR_3500 0.1 kPa
5 Ignition advance angle 2 Ignition angle VAR_3001 0.1o BTDC
6 Air Fuel Ratio misc 1 Lambda 1 VAR_4000 0.01 lambda
7 Air Fuel Ratio target misc 2 Lambda 2 VAR_4001 0.01 lambda
8 Battery voltage misc 3 Battery voltage VAR_4002 0.01 V
9 Primary Ing Time measured time 1 Fuel inj 1 PW on VAR_2500 µs
10 Secondary Inj Time measured time 2 Fuel inj 2 PW on VAR_2501 µs
11 Coil on Time measured time 9 Coil 1 PW VAR_2508 µs
12 Air Temperature temperature 1 temperature 1 VAR_1000 0.1 oC
13 Coolant Temperature temperature 8 Water temp VAR_1007 0.1 oC
14 Aux Temperature temperature 25 Aux 1 VAR_1024 0.1 oC
15 Exhaust Gas Temp temperature 17 Exhaust 1 temp VAR_1016 0.1 oC

Please note that on the Emerald the serial data is NOT ON STANDARD PINS, the Emerald ECU uses serial data pins 8 and 9. Race Technology understand that EMERALD supply a cable that switch over these pins with the ECU, if you are unable to locate this lead then please contact Emerald for a replacement.

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

Note - Not all channels listed in the table(s) above may be available from your ECU. This can be dependent on the vehicle model & year of manufacture.

Page last modified on May 13, 2019, at 07:34 PM