AEM 30-5143 Analog E85 Wideband UEGO Gauge E85 AFR User Manual
Page 5
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
Analog Output
The analog output from the AEM E85 Analog Wideband Air/Fuel Ratio gauge is a linear
dc voltage signal that varies from 0.5 Vdc at 5.6:1 AFR E85 to 4.5Vdc at 11.9:1 AFR
E85 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 = 1.567(V) + 4.825
For example, if the output is 2.0 Vdc, the AFR is 7.96:1
1.567 * 2.0 + 4.825 = 7.96:1
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
5.6
1.40
7.0
2.81
9.2
4.21
11.4
0.16
5.6
1.56
7.3
2.96
9.5
4.37
11.7
0.31
5.6
1.72
7.5
3.12
9.7
4.52
11.9
0.47
5.6
1.87
7.8
3.28
10.0
4.68
11.9
0.62
5.8
2.03
8.0
3.43
10.2
4.84
11.9
0.78
6.0
2.18
8.2
3.59
10.5
4.99
11.9
0.94
6.3
2.34
8.5
3.74
10.7
NA
NA
1.09
6.5
2.50
8.7
3.90
10.9
NA
NA
1.25
6.8
2.65
9.0
4.06
11.2
NA
NA
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.
Table 1. Error Codes
Table 2. EMS Software Values