AEM 30-5130 Analog Wideband UEGO Gauge Gasoline AFR - Manual (Page 5)

# of Flashes Fault Corrective Action
1-6 Sensor Wiring and/or sensor Check sensor cable for
broken wires/shorts
7 System voltage below 10 volts dc Check electrical system
for good connections
and proper function
Table 1. Error Codes
Analog Output
The analog output from the AEM Analog Wideband Air/Fuel Ratio gauge is a linear dc
voltage signal that varies from 0.5 Vdc at 8.5:1 AFR to 4.5Vdc at 18.0:1 AFR over the
operating range of the gauge. The signal is used for sending information to a data
logger or an engine management system like the AEM EMS or F/IC. The transfer
function for the output is listed below.
AFR = 2.375(V) + 7.3125
For example, if the output is 2.0 Vdc, the AFR is 12.06:1
2.375 * 2.0 + 7.3125 = 12.06
Configuring the AEM EMS
With an EMS calibration open, go to Setup>Sensors>Oxygen Sensor #1(2)>O2 Sensor
#1(2) Cal Table>Table, and enter the values below into the O2 Sensor #1(2) Cal Table.
Voltage AFR
Voltage AFR Voltage AFR Voltage AFR
0.00 8.43 1.40 10.64 2.81 13.99 4.21 17.31
0.16 8.43 1.56 11.02 2.96 14.34 4.37 17.69
0.31 8.43 1.72 11.40 3.12 14.72 4.52 18.05
0.47 8.43 1.87 11.75 3.28 15.10 4.68 18.05
0.62 8.79 2.03 12.13 3.43 15.46 4.84 18.05
0.78 9.17 2.18 12.49 3.59 15.84 4.99 18.05
0.94 9.55 2.34 12.87 3.74 16.20 NA NA
1.09 9.90 2.50 13.25 3.90 16.58 NA NA
1.25 10.28 2.65 13.61 4.06 16.96 NA NA
Table 2. EMS Software Values
Connect the WHITE Analog Output + wire to the EMS Lambda input and the BROWN
Analog Output – wire to the EMS sensor ground. Table 3 below lists the Lambda and
Sensor ground pin locations for the different EMS part numbers.
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