Call me back | My basket | Checkout | Add to email list

     You are here: Website » Knowledge base

« back to website

ECUType / MoTeCM4AndM48

MoTeC M4 and M48 ECU

The MoTeC M4 (and M48) ECU outputs an 84 byte sequence of data at 9.6kbaud. This is the standard MoTeC M4 Set 5 data protocol. The ECU must be configured to output data set 5 at 9600 baud. From this data, the following channels are extracted.

ECU Name Race Technology message Race Technology Default name Race Technology VAR number Resolution
Engine Speed Engine RPM RPM VAR_0010 25 RPM
Throttle Position aux 1 Throttle position VAR_2000 0.1%
Ambient Temp temperature 1 temperature 1 VAR_1000 0.1 oC
Coolant temp temperature 8 Water temp VAR_1007 0.1 oC
Auxiliary temp temperature 25 Aux 1 VAR_1024 0.1 oC
ECU Temp temperature 16 ECU temp VAR_1015 0.1 oC
Lambda short term trim aux 2 Lambda 1 short trim VAR_2001 0.1%
Lambda long term trim aux 4 Lambda 1 long trim VAR_2003 0.1%
Fuel injector duty cycle aux 6 Fuel inj 1 PW VAR_2005 0.1%
Ignition cut level aux 22 Ignition cut VAR_2021 0.1%
Fuel cut level aux 14 Fuel inj 1 cut VAR_2013 0.1%
Fuel Aux Temp compensation aux 30 Fuel aux temp comp VAR_2029 0.1%
Fuel Aux volt compensation aux 31 Fuel aux volt comp VAR_2030 0.1%
Lambda misc 1 Lambda 1 VAR_4000 0.01 lambda
Manifold pressure pressure 5 Boost pressure VAR_3504 0.1 kPa
Barometric pressure pressure 1 Ambient air pressure VAR_3500 0.1 kPa
Battery voltage misc 3 Battery voltage VAR_4002 0.01 V
Fuel actual pulse width measured time 1 Fuel inj 1 PW on VAR_2500 µs
Ignition Advance angle 2 Ignition angle VAR_3001 0.1o BTDC

IMPORTANT: If your ECU is an M4 with serial number 2999 or lower, or any M48 ECU, the ECU Interface must be connected to the ECU via the MoTeC Computer Interface Cable. The cable must be connected the right way around (one end is labelled ECU), the other end must be connected to the ECU Interface connector marked ECU. This is a special cable that contains electronic circuitry, a standard cable will not work. If your ECU is an M4 with serial number 3000 or above the MoTeC Computer Interface Cable is not required the Race Technology ECU interface should be connected directly to the ECU.

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 07:43 PM