AEM Digital Wideband UEGO Gauge 304110 User Manual

ADVANCED ENGINE MANAGEMENT INC. 
2205 126th Street Unit A, Hawthorne, CA. 90250 
Phone: (310) 484-2322 Fax: (310) 484-0152 
http://www.aemelectronics.com  
Instruction Part Number: 10-4110 Rev 140520 
 2014 Advanced Engine Management, Inc. 
 
 
Page 1 
 
 
 
Installation Instructions for 
30-4110 
Gauge-Type UEGO Controller 
 
 
 
 
WARNING:
!
This installation is not for the electrically or mechanically 
challenged! Use this sensor with EXTREME caution! If you are 
uncomfortable with anything about...

Page 2 
AEM Gauge-Type UEGO Controller Parts 
1 x UEGO Gauge Assembly 
1 x UEGO Sensor 
1 x O2 Sensor Bung 
4 x Butt Connectors 
1 x Installation Instruction 
1 x 4 Lead Harness 
1 x UEGO Sensor Harness 
1 x Silver Bezel 
1 x Black Lambda Faceplate 
1 x White AFR Faceplate 
 
Replacement Wideband Controller Components 
30-2004  Replacement Bosch LSU49 Sensor 
35-3441  96” Wideband LSU49 UEGO Sensor Replacement Cable 
35-3401  36” Wideband UEGO Power Replacement Cable 
35-4005 Mild Steel Oxygen Sensor...

Page 3 
 
Typical production vehicle oxygen sensors rely on “Nernst Cell” technology, commonly 
called “Narrow Band” and sometimes erroneously described as “Wide Band”. This is a 
very cost effective method that outputs a voltage based on the oxygen content of the 
gas being sampled. It is accurate in the region surrounding stoichiometric operation and 
leaner. Unfortunately, in the rich region where high performance engines usually 
operate, their accuracy and repeatability is virtually non-existent....

Page 4 
Each AEM UEGO sensor is individually calibrated and a resistor integral at the 
connector body is laser trimmed with this value. This process replaces the “free air” 
calibration procedure required by some manufacturers when changing sensors and 
implements a sensor specific calibration for unparalleled accuracy. (Figure 2) 
 
Figure 2. The connector module contains a laser trimmed calibration resistor, 
which defines the characteristic of the sensor. 
 
INSTALLATION 
Disconnect the negative (-)...

Page 5 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 4. Gauge Side Harness Connections 
 
 
 
 
RED   
Connect to a switched 10-18 volt power source utilizing a 10A fuse. 
 
BLACK   
Connect to a clean power ground. 
 
*WHITE  
Connects to any auxiliary unit that accepts a 0-5 volt input. 
 
*BLUE  
Connects to a RS-232 com port for hyper-terminal data logging. 
 
*optional  
 
  

Page 6 
 
 
Analog Output  
 
(Skip this section if you are not connecting the product to an AEM EMS.) 
If the AEM UEGO gauge is to be connected to an AEM EMS, the UEGO gauge’s 
WHITE Analog Output wire shall be connected to an EMS Lambda input. Locating a 
suitable Lambda input channel can be done using the Application Notes provided with 
the EMS. If the Application Notes are not readily accessible, a current list of AEM 
Engine Management Systems is illustrated below.  (Table 1) 
 
AEM Series 2 EMS...

Page 7 
Below (Table 2) is a list of AFR values that should be entered into the 02 Sensor #1(#2) 
Cal Table if inputting the analog signal to an AEM EMS. These calibration table(s) are 
found in the AEMPro software: Setup | Sensors | Oxygen Sensor | Oxygen Sensor 
#1(#2) 
 
02 Volts Lambda 
Gasoline AFR Methanol AFR Propane AFR Ethanol AFR CNG AFR
0.00 0.683 
10.00 4.42 10.72 6.15 9.90 
0.16 0.705 
10.32 4.56 11.07 6.34 10.22 
0.31 0.725 
10.62 4.69 11.39 6.53 10.52 
0.47 0.747 
10.94 4.83 11.73 6.73...

Page 8 
1.       Unplug the O2 Sensor from the 30-4110 Gauge. 
2.
       Open up the O2 Calibration Setup Wizard by navigating to Wizards -> Setup Wizard 
-> Sensor: O2 #1 (AFR) 
3.
       Double click the AEM Digital Gauge (PN 30-4100) it will highlight and display 
matched. 
4.
       Click Apply and close screen. 
5.
       Note: The O2 Gain options have been removed from Series2 EMS firmware.  
6.
       Next navigate to the O2 Sensor #1 Cal Table. This can be done by clicking on the 
Sensors Tab at...

Page 9 
 
Verify the settings above and click OK. When power is supplied to the AEM UEGO Gauge, AFR 
(or Lambda) data will be displayed, as shown below. (Figure 6) 
 
 
Figure 6. Data logging with HyperTerminal 
 
 
 
UEGO Sensor 
The 30-4110 is compatible with Bosch LSU4.9 sensors *only*.  This sensor can be 
identified by the connector as shown in Figure 7. 
 
 
Figure 7. Use only Bosch LSU4.9 Sensors! 
 
 
 
 
 
If attempting to route the UEGO Sensor through a tight space, AEM recommends 
routing the...

Page 10 
 
IMPORTANT INSTALLATION NOTE - UEGO Sensor Mounting Orientation  
 
 
A weld-in M18 X 1.5 boss is supplied for sensor installation. Mount the O2 sensor in the 
exhaust system at least 18 inches downstream from the exhaust port. If you anticipate 
high EGTs (over 800C), run a turbocharger, run at high RPM for extended periods of 
time or plan on running leaded race fuel then you must mount the sensor at least 36 
inches or more downstream of the exhaust port as all of these can cause the sensor...