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Hondata K4Pro and S300 ECU


Connect Race Technology CAN High to the CAN High pin on the Hondata K4Pro or S300 ECU

Connect the Race Technology CAN Low to the CAN Low pin on the Hondata K4Pro or S300 ECU

If not using Race Technology supplied CAN terminator, a 120ohm resistor must be installed between CAN High and CAN Low.


The ECU software must be setup as follows: CAN Output - Hondata Protocol (500kbps)

Channel Listing

ECU name Race Technology message Race Technology Default name Race Technology VAR number Resolution
RPM Engine RPM RPM VAR_0010 1 RPM
Speed Misc 4 Speed From ECU VAR_4003 1Kph
Gear Aux 26 Auxiliary 1 VAR_2025 Raw Value
Battery Voltage Misc 3 Battery Voltage VAR_4002 0.1v
Throttle Position Aux 1 Throttle Position VAR_2000 0.1%
Lambda Misc 1 Lambda 1 VAR_4000 1 Lambda
MAP Pressure 5 Boost Pressure VAR_3504 1 kPa
ECT Temperature 8 Water Temperature VAR_1007 1C
Analog 0 Aux 3 Lambda 2 Short Trim VAR_2002 0.1v
Analog 1 Aux 4 Lambda 1 Long Trim VAR_2003 0.1v
Analog 2 Aux 5 Lambda 2 Long Trim VAR_2004 0.1v
Analog 3 Aux 6 Fuel Inj 1 PW VAR_2005 0.1v
Analog 4 Aux 7 Fuel Inj 2 PW VAR_2006 0.1v
Analog 5 Aux 8 Fuel Inj 3 PW VAR_2007 0.1v

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 June 23, 2020, at 09:32 AM