AEM ECU
Compatibility
This protocol works with all AEM ECUs except the #30-6905 EMS-4 which does not have a serial port. For series 2 EMS systems or for the #30-6905 EMS-4 you can use the AEM CAN interface.
Configuration
- ECU configuration not required.
Connections
This ECU should be connected via serial / RS232 connections:
- The Race Technology ECU Interface will connect directly to the AEM ECU. Connect the ECU connector from the interface into the ECU communications port.
Data Channel Listing
- The AEM ECU outputs a 21 byte sequence of data at 19200 baud. From this data, the following channels are extracted:
| ECU Message Name
| Race Technology Data Channel
| Resolution of Data
|
| Engine speed
| RPM (Engine RPM)
| 25 RPM
|
| ADCR8
| Analog 21 (analogue input 21)
| 0.001V
|
| ADCR11
| Analog 22 (analogue input 22)
| 0.001V
|
| ADCR13
| Analog 23 (analogue input 23)
| 0.001V
|
| ADCR14
| Analog 24 (analogue input 24)
| 0.001V
|
| ADCR15
| Analog 25 (analogue input 25)
| 0.001V
|
| ADCR16
| Analog 26 (analogue input 26)
| 0.001V
|
| ADCR17
| Analog 27 (analogue input 27)
| 0.001V
|
| ADCR18
| Analog 28 (analogue input 28)
| 0.001V
|
| Engine Load
| Boost pressure (pressure 5)
| 1 mBar
|
| Air temp
| Inlet post intercooler 1 (temperature 6)
| 0.1 oC
|
| Coolant temp
| Coolant temp (temperature 8)
| 0.1 oC
|
| Throttle
| Throttle position (aux 1)
| 0.1%
|
| 02-1
| Lambda 1 (misc 1)
| 0.01 lambda
|
| 02-2
| Lambda 2 (misc 2)
| 0.01 lambda
|
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.
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