AEM 30-2340-N 4-Channel Wideband UEGO AFR Controller User Manual

AEM 4-CH WIDEBAND UEGO CONTROLLER WITH

Part Number 30-2340-N

NASCAR SPEC ECU CAN CONFIGURATION

FIGURE 1. WIRING DIAGRAM

AEM Performance Electronics

th

2205 126

Phone: [phone] Fax: [phone]

Street Unit A, Hawthorne, CA. 90250

http://www.aemelectronics.com

Instruction Part Number: 10-2340-N

© 2012 AEM Performance Electronics

AEM 4 CH UEGO Controller Parts

1 x 35-2340 4 CH UEGO Module
1 x 35-2908 Wiring Harness
4 x 1-2059 6-32 Stainless Steel Hex Nut
4 x 1-2047 6-32 x 1 ¼ screw
1 x 10-2340-N Installation Instructions

INSTALLATION

PROCEDURE OVERVIEW

1. Disconnect the negative battery cable.

2. Find a suitable mounting location for the 4 CH UEGO controller, away from any
direct heat or water sources and shielded from the elements.

3. Connect the flying lead analog output wires as shown in Figure 1.

4. Mount the UEGO sensors as shown in figure 2.

5. Plug the UEGO sensor connector on the harness into the mating connector on
each UEGO sensor.

6. Install the 30-2064 EBP sensor kit* and connect it as shown in Figure 1.
* Sold Separately

WIRING INSTRUCTIONS

Power

RED - Connect to a switched, fused (20A) 12-volt power source, that is on only when

the engine is running.

BLACK – Connect to a clean power ground.

Outputs

WHITE - Connect to Lambda + Input.
BLACK - Connect to sensor ground. Connect to power ground if sensor ground is not
available.

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MOUNTING INSTRUCTIONS

UEGO Sensor Mounting

A high flow stainless steel weld-in sensor bung is needed for sensor installation
(additional sensors & bungs are available 30-2063). The bung is specifically designed
so the sensor can provide accurate AFR readings with minimal flow intrusion and
survive extreme exhaust gas temperatures. Pick a mounting location(s) that allows for
easy access to the sensor(s). The sensor tip must be exposed to exhaust gas in order
to give accurate AFR readings. For thin wall tubing, drill a 15/16” hole and weld in the
bung. For thick wall tubing/ castings, drill a 1 1/16” hole and weld in the bung. The
sensor must be mounted at an angle of at least 10 degrees from horizontal in order to
prevent liquids from collecting in the sensor housing. See Figure 2 below. NOTE:

THE OPTIONAL AEM EBP (EXHAUST BACK PRESSURE) KIT (PART # 30-2064)
MUST BE USED IF SENSORS ARE MOUNTED PRE-TURBO.

FIGURE 2. Sensor Bung and Sensor Mounting

Controller Mounting

Mount the controller using the supplied 6-32 x 1 ¼ stainless steel screws and nuts. See
Figure 3 and Figure 4 for mounting holes and footprint size.

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Mounting
Screws

FIGURE 3. Mounting holes

FIGURE 4. Dimensions

OPERATING INSTRUCTIONS

INDICATOR LIGHTS

The AEM 4 CH UEGO controller has eight indicator LEDs, one Status and one Ready
LED for each channel (Figure 5). Both Ready and Status LEDs flash during sensor

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warm up. Once the UEGO sensor reaches operating temperature, usually within 30
seconds, the Status LED will turn off and the Ready LED will remain on solid. If a
UEGO sensor error is detected, analog output will switch to approximately +5V and both
LEDs will flash. The Status LED will flash on and off a number of times, followed by a
short pause, signifying an error code. The error codes are listed below in Table 1.

# of Flashes Fault Corrective Action

1 UEGO sensor heater open
2 Virtual Ground (VM) Error
3 Nernst Cell (UN) Error
4 Pump current (IP) Error

Check sensor cable for

broken wires/shorts

5 UEGO sensor heater time out
6 UEGO sensor heater short
7 System voltage below 10 volts dc Check electrical system

for good connections

and proper function

TABLE 1. Error Codes

When there is no UEGO sensor connected to a particular channel, the Status LED of
that channel will remain on solid and the Ready LED will turn off after a few minutes.
The remaining channels with UEGO sensors connected will function properly.

When the exhaust back pressure kit (30-2064) is used, the 4 CH UEGO controller will
monitor exhaust back pressure. (NOTE: The 4 CH UEGO controller is designed to

work with a specific AEM pressure sensor. Do not use any sensor other than the
one included in the Exhaust Back Pressure Kit.) If a pressure sensor error is

detected, the 4 CH UEGO controller turns off all Ready LEDs and flashes Status LEDs,
starting with CH1 and ending with CH4. The analog output voltage level for all 4
channels switches to approximately +5V to signify an error.

Status Indicator
LED

FIGURE 5. Indicator Lights

Ready Indicator
LED

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BACK PRESSURE COMPENSATION (OPTIONAL)

UEGO sensors are extremely sensitive to pressure. Without an EBP kit (30-2064),
UEGO sensors mounted before the turbocharger will give inaccurate AFR readings due
to back pressure. When the EBP kit is installed correctly, the 4 CH UEGO controller will
output accurate AFR readings. UNDER NO CIRCUMSTANCES SHOULD UEGO
SENSORS BE MOUNTED PRE-TURBO WITHOUT USING THE EBP KIT.

When using multiple 4 Channel UEGO controllers on twin turbo or dual bank engines, it
is recommended that an EBP kit is used for each controller as back pressure levels can
vary per bank. When using multiple 4 Channel UEGO controllers on single turbo
engines, such as an inline 6, it is possible to share a single EBP source. To share a
single EBP source between multiple controllers, the green and black EBP wires for each
controller must be tied together as shown in Figures 6 and 7. Use extreme caution
when modifying the harness as improper connections may result in inaccurate AFR
readings. Be sure to cover all connections with moisture resistant heat shrink or
equivalent covering.

Figure 6. EBP sensor connector Figure 7. Cut & Spliced wires

UEGO ANALOG OUTPUT

The analog output from the 4 CH UEGO controller is a linear dc voltage signal that
varies from 0.5 Vdc at 8.5:1 AFR Gasoline (0.58 Lambda) to 4.5Vdc at 18.0:1 AFR
Gasoline (1.22 Lambda). The signal is used for sending information to a data logger or
an engine management system such as the AEM EMS or F/IC. The transfer function
for the output is listed below.

AFR Gasoline = 2.375(V) + 7.3125

For example, if the output is 2.0 Vdc, the AFR is 12.06:1

2.375 * 2.0 + 7.3125 = 12.06

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A table showing the analog output voltage and corresponding Air/Fuel ratios for some of
the common fuels is shown below in Table 2.

AFR

VOLTS LAMBDA AFR GAS

0.50 0.58 8.5 3.7 5.6 5.2

0.71 0.61 9.0 3.9 5.9 5.5

0.92 0.65 9.5 4.1 6.3 5.8

1.13 0.68 10.0 4.4 6.6 6.1

1.34 0.71 10.5 4.6 6.9 6.4

1.55 0.75 11.0 4.8 7.3 6.7

1.76 0.78 11.5 5.0 7.6 7.0

1.97 0.82 12.0 5.2 7.9 7.3

2.18 0.85 12.5 5.4 8.2 7.7

2.39 0.88 13.0 5.7 8.6 8.0

2.61 0.92 13.5 5.9 8.9 8.3

2.82 0.95 14.0 6.1 9.2 8.6

3.03 0.99 14.5 6.3 9.6 8.9

3.11 1.00 14.7 6.4 9.7 9.0

3.24 1.02 15.0 6.5 9.9 9.2

3.45 1.05 15.5 6.7 10.2 9.5

3.66 1.09 16.0 7.0 10.6 9.8

3.87 1.12 16.5 7.2 10.9 10.1

4.08 1.16 17.0 7.4 11.2 10.4

4.29 1.19 17.5 7.6 11.5 10.7

4.50 1.22 18.0 7.8 11.9 11.0

METHANOL AFR E85

AFR

ETHANOL

TABLE 2. AFR Values

AEMNet NETWORK

The AEMNet is designed to provide easy installation & communication between
compatible AEM devices. The 4 CH UEGO controller outputs Lambda values of all four
channels and other useful information via the network. If using a non-AEM device to
communicate with the 4 CH UEGO controller, refer to the section " Connecting To the
AEMNet Network Using a non-AEM Device” below.

4 CH UEGO controller information:

• Lambda values (all 4 channels)

• Error messages (all 4 channels)

o UEGO sensor Error
o System low power Error
o EBP sensor error

• Cylinder Configuration Mode (1 – 7), refer to Table 3.

• Exhaust Back Pressure sensor value in PSIg

• Exhaust Back Pressure sensor status

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There are 7 different cylinder numbering combinations available on the AEM network.
The different combinations allow for easy installation and data analysis, and allow users
to connect up to three 4 Channel UEGO modules on the AEM network. See Table 3
and the figures below for recommended connections on some of the more common
engine configurations.

MODE 4

MODE 3

MODE 1

CHEVROLET/ DODGE/ TOYOTA FORD

MODE 6

MODE 3

HONDA / ACURA NISSAN / TOYOTA

MODE 2

MODE 4MODE 7

MODE 2

MODE 5

MODE 4

MODE 1

MODE 3

VIPER V12

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MODE 5

MODE 6

MODE 7

MODE 1

4 CYLINDER 6 CYLINDER

FIGURE 8. 4 CH UEGO controller configuration mode

MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7
UEGO 1 Cylinder1 Cylinder 5 Cylinder 1 Cylinder 2 Cylinder 9 Cylinder 1 Cylinder 4
UEGO 2 Cylinder 2 Cylinder 6 Cylinder 3 Cylinder 4 Cylinder 10 Cylinder 2 Cylinder 5
UEGO 3 Cylinder 3 Cylinder 7 Cylinder 5 Cylinder 6 Cylinder 11 Cylinder 3 Cylinder 6
UEGO 4 Cylinder 4 Cylinder 8 Cylinder 7 Cylinder 8 Cylinder 12 --- ---

TABLE 3. UEGO sensor connection

For example, Chevrolet big block engines require two 4 CH UEGO controllers. The first
unit connects to cylinders 2, 4, 6 and 8 using MODE 4 (see Table 3). UEGO 1 connects
to cylinder 2, UEGO 2 to cylinder 4, UEGO 3 to cylinder 6, and UEGO 4 to cylinder 8.
The second unit connects to cylinders 1, 3, 5 and 7 using MODE 3. UEGO 1 connects
to cylinder 1, UEGO 2 to cylinder 3, and so on.

Honda / Acura V6 engines also require two 4 CH UEGO controllers. As shown in
Figure 8, Mode 6 and 7 from Table 3 are used. UEGO 1, 2, 3 of the first 4 CH UEGO
controller connect to cylinders 1, 2 and 3. UEGO 1, 2, 3 of the second unit go to
cylinder 4, 5 and 6. Unused channels can be left unconnected.

Cylinder Mode Configuration

NOTE: Only applicable when using AEMnet.
Configuration mode is selected during the power up sequence. By factory default the 4

CH UEGO controller is in MODE 1. There are three wires, CONFIG 1 (pink), CONFIG 2
(purple) and GROUND (yellow) under the sleeve on the wiring harness (Figure 9). To
change the mode, first make sure the 4 CH UEGO controller is powered off. Connect
CONFIG 1 to GROUND and power the 4 CH UEGO controller on. Tap CONFIG 2 to
the GROUND wire. The 4 Channel UEGO controller will jump to the next mode every
time the CONFIG 2 wire is tapped to the GROUND wire. The LEDs will illuminate to

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