AEM 30-1931 Universal Fuel Ignition Controller 8 Channel - Manual (Page 17)

Page 17
 “Percent” mode - The F/IC will measure the input voltage on the Analog A(B)
input wire and modify the output voltage by the value in the Analog A(B) map.
For an input voltage of 1 volt, a cell value of 6, the output voltage will be 1.06
volts.
 “Voltage” mode - The F/IC will output the voltage value that is in the “MAF Map”.
For example, the F/IC will output 2.5 volts for a value of 2.5 in the Analog A(B)
map.
 “Offset” mode - The F/IC will measure in the input voltage on the Analog A(B) in
wire and offset the voltage by the number in the Analog A(B) map. For an input
voltage of 1.5 volts and a cell value of .25, the F/IC will output 1.75 volts.
O2 Map (See Figure 28.)
At times, such as a track day or race event, you may desire to alter the closed-
loop air fuel ratio(AFR) of the factory ECU to achieve better engine performance. This
can be done using the O2 functionality of the F/IC. By outputting a different signal, the
F/IC can alter the target AFR of the factory ECU. The O2 map
“Load Input” can be
based on MAP, MAF, TPS, or O2 sensors. The
“O2 Map” also has four different
operating modes, Fixed, Percent, Offset, and Voltage. The load inputs and modes are
selected in the
“O2” section of the “Setup” window.
 “Voltage” mode - The F/IC outputs a voltage, which is determined by the
corresponding cells in the
“O2 Map”. In the “Voltage” mode, for an “O2 Map” cell
value of 2.5, the F/IC will output 2.5 volts.
In “Voltage” mode, a cell value of 0
makes no change, NOT an output voltage of 0 volts.
 “Fixed” mode - The F/IC outputs a square wave that alternates between the Bank
Hi voltage and the Bank Lo voltage. The Bank Hi voltage, Bank Lo voltage, and
square wave period are set in the O2 section of the setup window. The pulse
width is determined by the cell value in the
“O2 Map”. For a Bank Hi of 2, and
Figure 27. Analog A/B Map