AEM Digital Wideband UEGO Gauge without Sensor 304110NS User Manual

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Configuring Calibration Outputs 
The  AEM  default  position  is  (P0).    When  set  to  (P0)  (Figure  10A),  the  gauge  displays 
AFR values. (P1) is the same as (P0), except the gauge displays lambda values.  These 
settings  (P1  and  P0)  implement  a  linear  calibration  with  the  most  useful  voltage  range 
possible  (0-5V).  The  AFR  calibration  (P2)  is  linear  and  similar  to  (P1)  with  a  smaller 
voltage  range  (1-2V).  The  AFR  calibration  (P3)  emulates  the  Autronic  Wideband  O2 
Sensor  calibration  (0-1V).  The  AFR  calibration  (P4)  emulates  a  non-linear  Nernst Cell 
calibration (0-1V). Refer to the Table 3 and Figure 9 for specific calibration details. 
 
LED LED Lambda AFR (Gasoline) Analog Output Voltage Modes 
Number Color (λ) AFR LED ON Range P0 P1 P2 P3 P4 
LED 1 Green 0.683 10 Rich Rich 0.000 0.000 1.000 0.000 0.905 
LED 1 Green 0.700 10.25 Rich Rich 0.125 0.125 1.025 0.013 0.904 
LED 1 Green 0.717 10.5 Rich Rich 0.250 0.250 1.050 0.025 0.903 
LED 1 Green 0.734 10.75 Rich Rich 0.375 0.375 1.075 0.038 0.902 
LED 1 Green 0.751 11.00 Rich 11.125 0.500 0.500 1.100 0.050 0.901 
LED 2 Green 0.768 11.25 11.125 11.375 0.625 0.625 1.125 0.063 0.900 
LED 3 Green 0.786 11.50 11.375 11.625 0.750 0.750 1.150 0.075 0.890 
LED 4 Green 0.803 11.75 11.625 11.875 0.875 0.875 1.175 0.088 0.880 
LED 5 Green 0.820 12.00 11.875 12.125 1.000 1.000 1.200 0.100 0.870 
LED 6 Green 0.837 12.25 12.125 12.375 1.125 1.125 1.225 0.113 0.860 
LED 7 Green 0.854 12.50 12.375 12.625 1.250 1.250 1.250 0.125 0.850 
LED 8 Green 0.871 12.75 12.625 12.875 1.375 1.375 1.275 0.138 0.840 
LED 9 Green 0.888 13.00 12.875 13.125 1.500 1.500 1.300 0.150 0.830 
LED 10 Green 0.905 13.25 13.125 13.375 1.625 1.625 1.325 0.163 0.820 
LED 11 Green 0.922 13.50 13.375 13.625 1.750 1.750 1.350 0.175 0.800 
LED 12 Yellow 0.939 13.75 13.625 13.875 1.875 1.875 1.375 0.188 0.775 
LED 13 Yellow 0.956 14.00 13.875 14.125 2.000 2.000 1.400 0.200 0.750 
LED 14 Yellow 0.973 14.25 14.125 14.375 2.125 2.125 1.425 0.213 0.700 
LED 15 Yellow 0.990 14.50 14.375 14.625 2.250 2.250 1.450 0.225 0.600 
LED 16 Yellow 1.008 14.75 14.625 14.875 2.375 2.375 1.475 0.238 0.410 
LED 17 Yellow 1.025 15.00 14.875 15.125 2.500 2.500 1.500 0.250 0.240 
LED 18 Yellow 1.042 15.25 15.125 15.375 2.625 2.625 1.525 0.263 0.170 
LED 19 Yellow 1.059 15.50 15.375 15.625 2.750 2.750 1.550 0.275 0.137 
LED 20 Yellow 1.076 15.75 15.625 15.875 2.875 2.875 1.575 0.288 0.113 
LED 21 Red 1.093 16.00 15.875 16.125 3.000 3.000 1.600 0.300 0.100 
LED 22 Red 1.110 16.25 16.125 16.375 3.125 3.125 1.625 0.313 0.091 
LED 23 Red 1.127 16.50 16.375 16.625 3.250 3.250 1.650 0.325 0.083 
LED 24 Red 1.144 16.75 16.625 Lean 3.375 3.375 1.675 0.338 0.077 
LED 24 Red 1.161 17.00 Lean Lean 3.500 3.500 1.700 0.350 0.076 
LED 24 Red 1.178 17.25 Lean Lean 3.625 3.625 1.725 0.363 0.075 
LED 24 Red 1.195 17.50 Lean Lean 3.750 3.750 1.750 0.375 0.074 
LED 24 Red 1.212 17.75 Lean Lean 3.875 3.875 1.775 0.388 0.073 
LED 24 Red 1.230 18.00 Lean Lean 4.000 4.000 1.800 0.400 0.072 
LED 24 Red 1.247 18.25 Lean Lean 4.125 4.125 1.825 0.413 0.071 
LED 24 Red 1.264 18.50 Lean Lean 4.250 4.250 1.850 0.425 0.070 
 
 Table 3. Calibration table of available outputs 
  
						

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 Figure 9. Calibration graph of available outputs 
 
To change the calibrations, a precision flat head screwdriver is needed. Locate the small hole located on 
the back of the AEM gauge, as shown below. (Figure 10) 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 10. Calibration position screw location 
 
With the screwdriver, clock the rotary switch into the desired calibration position, referring to the diagram 
below  (Figure  10A),  and  watch  the  alphanumeric  readout,  which  will  display  the  new  position  when 
entered. 
 Figure 10A. Calibration screw position settings 
 
The calibration will not be changed until the rotary switch reaches the middle of the new position. 10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
0.00.51.01.52.02.53.03.54.0
Ana log Volta ge  (V)
Air /Fuel G asolin e (AFR)
0.68
0.78
0.88
0.98
1.08
1.18
Lambda (λ) 
AFR Sma ll Volt Ra nge  (P2)AFR Autronic Emula tion (P3)
AFR Ne rnst Emula tion (P4)AEM GAUGE De fa ult (P0 & P1) P4
P3
P2
P1
P0
ROTARY SWITCH  
						

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Changing the gauge configuration 
The AEM UEGO gauge comes configured with the black bezel and the black AFR 
faceplate.  However, a silver bezel, a white AFR faceplate, and a black Lambda 
faceplate are also included in the gauge kit.  To change the faceplate or bezel, orient 
the gauge so you are looking at the faceplate.  Rotate the bezel counter-clockwise to 
unscrew it from the gauge cup.  The bezel, glass lens, rubber spacer, faceplate, and 
anti-glare shield are all removable.  Reassemble the gauge as shown in the photo 
below.  Make sure the small light holes in the faceplate and anti-glare shield line up with 
the light sensor on the circuit board.  Do not over tighten the bezel when reassembling 
the gauge. (Figure 11) 
 
 
 
 
 
 
 
 
Figure 11. Gauge Assembly 
 
For  your  reference, below  is  the  multiplier  for  calculating  the  Air  Fuel  Ratio  (AFR)  of  common 
fuels from the Lambda value. 
 
Gasoline AFR   =  Lambda x 14.64 
Methanol AFR  =  Lambda x 6.47 
Propane AFR   =  Lambda x 15.7 
Ethanol AFR   =  Lambda x 9.00 
CNG AFR   =  Lambda x 14.5 
 
Specifications: 
Gauge 
Supply Current (nominal): 1.3 amps 
0-5V Analog Outputs: 1 
Measuring Range: Sweeping LED  0.751 to 1.143 Lambda 
Measuring Range: Numerical Display 10.0:1 to 18.5:1 AFR Gasoline 
Harness & Connector Temp Limit: 105C 
Sensor 
Type: Bosch UEGO LSU4.9 
Accuracy: +/- 0.7% 
Exhaust Temp Limit: 1030C 
Cable & Protector Sleeve Temp Limit: 250C 
Connector Temp Limit: 120C 
Initial Warm-up Time: Less than 20 seconds 
Weight: 80 grams 
Heater Current: 1.2A at 12.0V (each sensor) 
Mounting: M18 X 1.5 thread, Torque to 30 ft-lbs 
Nominal Service Life: 
 
 
 
80,000 km for Unleaded Fuel 
50,000 km for Leaded Fuel 0.15g Pb/l 
20,000 km for Leaded Fuel 0.40g Pb/l 
10,000 km for Leaded Fuel 0.60g Pb/l 
  
						

							Page 14 
 
 
IMPORTANT Notes – PLEASE READ 
The  sensor  contains  a  ceramic  module  and  should  not  be  subject  to  mechanical  or 
thermal  shock  or  it  may  be  damaged.  The  sensor  is  not  designed  for  operation  on 
leaded fuels, doing so will dramatically shorten sensor life. Long term running in the rich 
region (Lambda < 0.95) will shorten sensor life. High exhaust temperatures (over 850C) 
will shorten  sensor  life.  Engine oil  consumption at  a rate  greater  than 1 quart  per  1,000 
miles  will  shorten  sensor  life.  With  the  UEGO  Sensor  installed,  do  not  run  the  engine 
without power applied to the gauge. 
 
12 MONTH LIMITED WARRANTY  Advanced  Engine  Management  Inc.  warrants  to  the  consumer  that  all  AEM  High  Performance  products  will  be  free  from  defects  in material  and  workmanship  for  a  period  of  twelve  (12)  months  from  date  of  the  original  purchase.  Products  that  fail  within  this  12-month warranty period will be repaired or replaced at AEM’s option, when determined by AEM that the product failed due to defects in  material  or  workmanship.  This  warranty  is  limited  to  the  repair  or  replacement  of  the  AEM  part.  In  no  event  shall  this  warranty exceed  the  original  purchase  price  of  the  AEM  part  nor  shall  AEM  be  responsible  for  special,  incidental  or  consequential  damages or  cost  incurred  due  to  the  failure  of  this  product. The  Bosch  LSU  4.9 UEGO  sensor  has  a  limited  life  and  is  not  warranted.   Warranty claims to AEM must be transportation prepaid and accompanied with dated proof of purchase. This warranty applies only to  the  original  purchaser  of  product  and  is  non-transferable.  All  implied  warranties  shall  be  limited  in  duration  to  the  said  12  month warranty period. Improper use or installation, accident, abuse, unauthorized repairs or alterations voids this warranty. AEM disclaims any  liability  for  consequential  damages  due  to  breach  of  any  written  or  implied  warranty  on  all  products  manufactured  by  AEM. Warranty returns will only be accepted by AEM when accompanied by a valid Return Goods Authorization (RGA) number.  Product must be received by AEM within 30 days of the date the RGA is issued.   Please note that before AEM can issue an RGA for any product, it is first necessary for the installer or end user to contact the AEM Performance Electronics tech line at 1-800-423-0046 to discuss the problem.  Most issues can be resolved over the phone.  Under no circumstances should a system be returned or a RGA requested before the above process transpires.   
Need additional help?  Contact the AEM Performance Electronics tech department at  
1-800-423-0046 or [email protected], or visit the AEM Performance Electronics 
forum at http://forum.aempower.com/forum/