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ECUType / MoTeCM400M600M800CAN

MOTEC M400 M600 M800 CAN

ECU connections


The CAN setup should be configured for mode 8 (Custom Data Set 1 Sequential) in the CAN 0 Data slot, with the address set in decimal, as shown in the screen capture below. Note that the CAN address is configurable, but the examples below will use 1520, which is 5F0 in hexadecimal.


Go to the “Setup Custom Data Sets” option on the menu, and set up Custom Data Set 1 to send the channels you want to transmit to the third party dash. Note that the order of the channels in the list here is important, as this determines whereabouts the channels are positioned in the CAN messages transmitted by the ECU.


Once the CAN setup has been configured as described above, the channels are allocated to the CAN IDs in the following way, depending on their position in the list. IDs below are listed in hexadecimal starting from the specified ID. Each channel is broadcast in 16-bit format, taking up two bytes.

Channel 1 Bytes 0-1
Channel 2 Bytes 2-3
Channel 3 Bytes 4-5
Channel 4 Bytes 6-7
Channel 5 Bytes 0-1
Channel 6 Bytes 2-3
Channel 7 Bytes 4-5
Channel 8 Bytes 6-7
Channel 9 Bytes 0-1
Channel 10 Bytes 2-3
Channel 11 Bytes 4-5
Channel 12 Bytes 6-7
Channel 13 Bytes 0-1
Channel 14 Bytes 2-3
Channel 15 Bytes 4-5
Channel 16 Bytes 6-7
Channel 17 Bytes 0-1
Channel 18 Bytes 2-3
Channel 19 Bytes 4-5
Channel 20 Bytes 6-7

If more than 20 channels are being transmitted, the allocation of channels to CAN IDs continues in the pattern shown above.


The MoTeC M400 M600 M800 CAN-series ECU operates with the following CAN parameters:

  • Bus speed 1Mbit/s
  • Standard length identifiers
  • Normal/Motorola/Big Endian alignment
  • Channel scaling for each parameter is detailed in the document “PSAU0015 MoTeC M800 Data Set 3 Protocol”
  • Transmit frequency is user definable, but normally 50Hz for all channels

Race Technology MOTEC M400 M600 M800 CAN standard configuration

ECU Name Race Technology message Race Technology Default name Race Technology VAR number Resolution
RPM Engine RPM RPM VAR_0010 1 RPM
Throttle Position aux 1 Throttle position VAR_2000 0.10%
Manifold pressure pressure 5 Boost pressure VAR_3504 1 kPa
Air temp temperature 1 temperature 1 VAR_1000 0.1 oC
Engine temp temperature 8 Water temp VAR_1007 0.1 oC
Lambda 1 misc 1 Lambda 1 VAR_4000 0.001
Fuel pressure pressure 3 Fuel pressure VAR_3502 1 kPa
Oil temp temperature 9 Oil temp VAR_1008 0.1 oC
Oil pressure pressure 2 Oil pressure VAR_3501 1 kPa
Exhaust Gas Temp 1 temperature 17 Exhaust 1 temp VAR_1016 0.1 oC
Battery volts misc 3 Battery voltage VAR_4002 0.01V
Speed 1 aux 26 Auxiliary 1 VAR_2025 0.1 KPH
Speed 2 aux 27 Auxiliary 2 VAR_2026 0.1 KPH
Speed 3 aux 28 Auxiliary 3 VAR_2027 0.1 KPH
Speed 4 aux 29 Auxiliary 4 VAR_2028 0.1 KPH

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 07:44 PM