AEM 30-2340-N 4-Channel Wideband UEGO AFR Controller - For use with Nascar McLaren ECU - Manual (Page 12)

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NOTE: the 4 CH UEGO controller has one terminating resistor. If an additional
terminating resistor is needed, one must be installed on the other device.
Network Message Structure
The 4 CH UEGO controller transmits two messages through the CAN network. The first
message contains Lambda values of all four channels and is transmitted every 10 ms.
The second message, transmitted every 40 ms, includes error flags, cylinder
configuration mode, EBP sensor readings and status. Messages are transmitted at
1Mbps and use standard format message ID (11 bits). Appendix A shows entire
message protocols, including message IDs, number of bytes, data field, etc.
Lambda values are scaled up by 10,000 to retain decimal points. For example, if a
value of 9,876 is received as a lambda value from a 4 CH UEGO controller, the actual
lambda value is 0.9876. Use the following equation to derive the actual lambda value:
Actual Lambda value = Lambda from a message / 10,000
The back pressure value is scaled up by 100. Use the following equation to derive the
actual back pressure value.
Actual back pressure value (PSIg) = pressure from a message / 100
USING THE 4 CH UEGO CONTROLLER WITH AN AEM SERIES 2 EMS
(Including EMS - 4)
AEMnet Network
Tuner Setup (Must use 01v22 firmware or newer)
In the AEMTuner EMS software go to Wizards -> Setup Wizard. Under Wizard types,
click on Setup: CAN Receive. Choose a configuration and click Apply. There are
currently 4 configuration types available: MODE 1 + EBP Sensor, MODE 1 + MODE 2,
MODE 4 + MODE 5, and MODE 6 + MODE 7. Once this configuration is completed
correctly, the word “Matched” will appear next to the configuration chosen, as shown in
Figure 13. Read the notes under Configuration Notes and close the window.