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ECUType / AutronicSM3AndSM4V109ToV115

Autronic SM3 and SM4 v1.09 to v1.15


  • Autronic SM3
  • Autronic SM4

The Autronic SM3 and the Autronic SM4 running on the below firmware version(s), streams data out automatically at a rate of 19200baud.

  • v1.09 to v1.15.

The O/P Datastream must be enabled in the ECU mapping software, as shown below:


This ECU should be connected via serial / RS232 connections.

  • The ECU is supplied with a serial cable:

Connect this between the ECU & Race Technology ECU Interface, Data Logger or Dashboard.

Data Channel Listing

ECU Message Name Race Technology Data Channel Resolution of Data
Coolant temp Coolant temp (temperature 8) 0.1 oC
Charge temp Inlet pre turbo 1 (temperature 2) 0.1 oC
Intake air temp Ambient air temp (temperature 1) 0.1 oC
Manifold pressure Boost pressure (pressure 5) 1 mBar
AF ratio Lambda 1 (misc 1) 0.01 lambda
Injection time Fuel inj 1 PW (aux 6) 1 ms
Ignition angle Ignition angle (angle 2) 0.1o
Battery voltage Battery voltage (misc 3) 0.01 V
Throttle position Throttle position (aux 1) 0.1%
User selectable data 1 Exhaust 1 temp (temperature 17) 0.1 oC
User selectable data 2 Exhaust 2 temp (temperature 18) 0.1 oC
User selectable data 3 Exhaust 3 temp (temperature 19) 0.1 oC
User selectable data 4 Exhaust 4 temp (temperature 20) 0.1 oC

Not all channels listed in the table above may be available from your ECU. The available data channels vary with the vehicle model, year of manufacture & connected sensors.

Page last modified on August 19, 2020, at 12:49 PM