HONDATA K–SERIES ECU
The Hondata K–Series ECU has software selectable 9600 bps or 115200 bps output baud rates. To be compatible with the Race Technology ECU decoder, the ECU must be set to output data at 9600 baud.
There are two models of this ECU in common usage, the PRA and PRB. This unit will only work with the PRB ECU.
| Name
| Race Technology Name
| Resolution
|
| Engine Speed
| Engine RPM (RPM)
| 25 RPM
|
| Coolant temp
| temperature 8 (Water temp)
| 0.1 oC
|
| Air temp
| temperature 1 (Ambient Air Temperature)
| 0.1 oC
|
| Battery Voltage
| misc 3 (Battery voltage)
| 0.01 V
|
| Air Fuel Ratio
| misc 1 (Lambda 1)
| 0.01 lambda
|
| Throttle Position
| aux 1 (Throttle position)
| 0.1%
|
| Manifold pressure
| pressure 5 (Boost pressure)
| 0.1 kPa
|
| Injector Time
| measured time 1 (Fuel Inj 1 PW on)
| µs
|
| Ignition Timing
| angle 2 (Ignition angle)
| 0.5o
|
There is more information about connecting to the hondata ECU here:
http://www.hondata.com/help/kmanager/index.html
In particular the data output from the ECU is on Pin 24 on the E connector, this is labelled as “SEFMJ”
IMPORTANT: The Hondata ECU does not use standard serial data voltage levels, so the hardware of the Race technology ECU adapter must be modified to suit this adapter. A Hondata ECU adapter cannot be used with any other ECU, and visa-versa.
On the Race Technology ECU adaptor there is a 9-way d-type connector labelled ECU. You need to connect PIN2 to PIN E24 of the ECU.
If you are powering the ECU from a different power source as the ECU adaptor then you will also need to connect pin 5 from the ECU adaptor to the ECU’s power supply ground.