10
7/12/2017 - DOCUMENT NUMBER: 10-0300
© 2017 AEM Performance Electronics
30-0300 X-Series UEGO Gauge
A 2-1/6" (52mm) hole is required to mount the X-Series gauge. A bracket and thumbscrews are provided to facilitate
installation into a panel or gauge pod. In some cases, the gauge cup may be pushed into a mounting hole causing an
interference fit strong enough to retain the gauge; the supplied rubber band may be fit to the gauge to create a tighter fit in
mounting holes slightly larger than 52mm. It is, however, recommended that gauges be mounted securely using the
supplied bracket to ensure they never become loose and cause a hazard during vehicle operation.
Note:
The gauge is not water-proof and should not be installed in a location with exposure to water or snow. Damage
caused by water ingress will not be covered under warranty.
0-5V Analog Output
WHITE WIRE = Analog Po
BROWN WIRE = Analog Negative -
0-5V Analog Output Scaling Formulas
AFR
=
(2.3750 * Volts) + 7.3125
Lambda
=
(0.1621 * Volts) + 0.4990
The 0-5V analog output is suitable for output to devices
such as loggers or ECUs. This differential output requires
special care to ensure proper operation. The WHITE
signal wire should be connected to the positive of the
analog input of the logging device or ECU; the BROWN
wire must be connected to the negative of the analog input
of the logging device or ECU. If the logging device or ECU
does not have a differential analog input (both a dedicated
positive and negative terminal for the analog input) then
connect the BROWN wire to the shared signal ground. If
the device does not have a dedicated signal ground then
as a last course of action, connect it to the power ground
of the logging device.
Important Note
: If bench testing the analog output
outside of a vehicle, a multimeter's positive lead may be
connected to the WHITE wire however the BROWN wire
must be connected to BOTH the multimeter's negative
lead AND power ground going to the X-Series UEGO
device. This connection is usually made by the circuitry
inside an ECU or data logger.
0-5V Analog Output Scaling Table
Volts
Lambda
AFR (Gasoline)
<0.50
SENSOR NOT READY
0.50
0.58
8.50
0.75
0.62
9.09
1.00
0.66
9.69
1.25
0.70
10.28
1.50
0.74
10.88
1.75
0.78
11.47
2.00
0.82
12.06
2.25
0.86
12.66
2.50
0.90
13.25
2.75
0.94
13.84
3.00
0.99
14.44
3.25
1.03
15.03
3.50
1.07
15.63
3.75
1.11
16.22
4.00
1.15
16.81
4.25
1.19
17.41
4.50
1.23
18.00
>4.50
SENSOR ERROR
AEMnet (CAN Bus) Output
WHITE WIRE WITH BLACK STRIPE = / CANH
GREEN WIRE WITH BLACK STRIPE = AEMnet- / CANL
The AEMnet output is suitable for output to AEM devices such as the AQ-1 data logger or Infinity ECU. The following
CAN configuration and message definition information is provided below to facilitate interface with third-party devices.
Message ID
If multiple gauges are connected to the same CAN bus then they must each be configured to have unique message IDs
using the gauge's menu system. Depress the MODE button to navigate to the CAN submenu, press the SEL button until
the desired ID is displayed then wait 3 seconds to accept setting; dOnE will appear to confirm your selection. The options
"ID 1", "ID 2", ..., "ID 16" correspond to the 29-bit identifiers 0x0000180,0x0000181, 0x0000180, ..., 0x000018F.
Bus Termination
All AEMnet/CAN networks must be terminated to have an
equivalent of approximately 60 Ohms of resistance.
Generally, this means a 120 Ohm resistor connected in
