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parallel to AEMnet+/AEMnet- (or CANH/CANL) at both
physical ends of the bus run. The X-Series controller does
not have any internal termination and is intended to be
connected to a pre-existing, properly terminated network.
Please refer to the Bosch CAN2.0B specification for further
detail.
Byte
Bit
Bitmask
0-1
2-3
4
5
6
0 (lsb)
0
1
2
2 - 4
4
5
32
6
64
7 (msb)
128
7
0 - 5
0
6
64
7 (msb)
128
Serial (RS-232) Output
BLUE WIRE = Serial Out
The serial datastream is suitable for output to third party devices such as data
loggers, PCs, or reflashed ECUs.
designed to match AEM's legacy 30-4100/30-4110 UEGO Digital Gauge for
backwards compatibility. The currently selected display mode (lambda or AFR)
will dictate what is output via serial. The format is simply the value followed by a
carriage return and line feed, e.g. "14.7\r\n"
FAQ / Troubleshooting
What are the minimum wiring connections needed to use the gauge?
Switched/fused 12V (RED) and power ground (BLACK) must be supplied to the 10 pin connector. Any unused wires may
be secured and fastened away for future use. The 8 pin sensor harness must also be connected between the gauge and
sensor.
When should I use free air calibration mode?
The sensor that is supplied is laboratory calibrated using the integral trim resistor; this is the preferred and recommended
calibration mode. If you feel your sensor has been extremely contaminated or damaged and requires re-calibration then it
is suggested that you purchase a new sensor. Alternatively, performing a free air calibration may be helpful.
The gauge displays "bAtt" when I key-on or crank the engine.
7/12/2017 - DOCUMENT NUMBER: 10-0300
30-0300 X-Series UEGO Gauge
Label
Lambda
Oxygen
System Volts
Reserved
Reserved
Bosch LSU4.9 Detected
Reserved
Free-Air cal in use
Reserved
Lambda Data Valid
Reserved
Sensor Fault
Reserved
The X-Series UEGO serial datastream is
bit rate
format
transmit rate
terminating resistor
endianness
Message/Arbitration ID
DLC
Data Type
Scaling
16 bit unsigned
.0001 Lambda/bit
16 bit signed
0.001%/bit
8 bit unsigned
0.1 V/bit
---
---
Boolean
0 = false, 1 = true
---
Boolean
0 = false, 1 = true
---
Boolean
0 = false, 1 = true
---
Boolean
0 = false, 1 = true
---
500
29
100
none
big / Motorola
0x00000180
to 0x0000018F
8
Offset
0
0 to 6.5535 Lambda
0
-32.768% to 32.767%
0
0 to 25.5 Volts
---
---
---
---
0
---
---
0
---
---
0
---
---
0
---
---
baud rate 9600 bps
data bits
parity
None
stop bits
© 2017 AEM Performance Electronics
11
kb/sec
bit ID
hz
Range
---
---
0/1
---
0/1
---
0/1
---
0/1
---
8
1
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