AEM 30-5130 Analog Wideband UEGO Gauge Gasoline AFR User Manual

Part Number 30-5130

Analog Wideband Air/Fuel Ratio Gauge

Figure 1. Wiring Schematic

AEM Gauge-Type UEGO Controller Parts

1 x 35-5130(B/W) UEGO Gauge Assembly
1 x 30-2001 UEGO Sensor
1 x 35-8535 Install Kit (O2 Bung with 6 Butt Connectors)
1 x 10-5130 Installation Instructions
1 x 35-3411 8-Pin Power Harness
1 x 35-3400 6-Pin Sensor Harness
1 x 35-8529S Silver Bezel

AEM Performance Electronics

2205 126

th

Phone: [phone] Fax: [phone]

Street Unit A, Hawthorne, CA. 90250
http://www.aempower.com

Instruction Part Number: 10-5130 Rev 02

© 2009 AEM Performance Electronics

INSTALLATION

1. Disconnect the negative battery cable.

2. Secure the gauge in a 2 1/16th” (52MM) mounting hole with the supplied bracket.

3. Plug the 8-wire power harness into the mating connector on the back of the
gauge and connect the wires as shown in Figure 1. Note: the locating tabs on
the side of the connector should be nearest the center of the gauge.

4. Mount the sensor as shown in figure 2.

5. Connect the sensor to the gauge using the 6-wire sensor cable. The connector
with the grey latch connects to the sensor. The single-row connector connects to
the back of the gauge. The locating tables on the single-row connector should
be farthest from the center of the gauge.

RED - Connect BOTH RED wires to a constant 12 volt power source utilizing a 5A fuse.
BLACK – Connect BOTH BLACK wires to a clean power ground.
PINK - Connect to a switched 12 volt power source utilizing a 5A fuse.
GREY - Connect to instrument lighting circuit supply voltage.
*WHITE - Connect to Lambda + Input.
*BROWN - Connect to Lambda – input. (Must be connected if Lambda + is used)
*optional – only needed if using the available differential analog output
Wiring notes:

RED - When wired as shown above, the gauge will park the needle upon
powering down. Alternatively, both RED wires can be connected to a switched, fused
12 volt power source. With both RED wires and the PINK wire connected to switched
power, the needle will remain at its current position upon powering down. For both
power connection methods, the needle will rotate to the parked position before rotating
to the value of the current operating condition upon powering up.
GREY – The GREY wire is used to control the lighting intensity of the gauge.
Maximum lighting intensity is achieved when the GREY wire is connected to 12 volts.
Minimum lighting intensity is achieved when the GREY wire is not connected. The
instrumentation illumination on many vehicles is controlled by varying the supply voltage
to the instrument panel lights. When the GREY wire is connected to the instrument
panel supply voltage, the intensity of the gauge is controlled by the dimmer switch on
the dash.
WHITE – The WHITE wire should be connected to the Lambda + input on the
EMS or the analog + input on a similar device.
BROWN – The BROWN wire should be connected to the Lambda – input or the
analog – input. If the EMS or similar device does not have a – input, the BROWN wire
should be connected to a sensor ground. If no sensor ground is available, the BROWN
wire should be connected to a power ground. Note: The BROWN wire must be
connected in order to get correct readings from the analog output.

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Sensor Mounting
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 EGT's (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 to
overheat. On turbocharged engines the UEGO sensor must be installed after the

turbo charger, if not, the pressure differential will greatly affect the accuracy of
the unit. For accurate readings, the sensor must be mounted before catalytic

converters and/or auxiliary air pumps. To prevent collection of liquids between the
sensor housing and sensor element during the cold start phase, the installation angle
should be inclined at least 10° from horizontal with the electrical connection upwards,
see below. (Figure 2)

>10°

Figure 2. Minimum mounting angle for the UEGO Sensor

Changing the Bezel

The AEM UEGO Gauge comes with the black bezel installed. However, a silver bezel
is also included in the gauge kit. To change the 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, and rubber spacer are all removable. Reassemble
the gauge as shown below in Figure 3. Do not over tighten the bezel when
reassembling the gauge.

Figure 3. Changing Bezels

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