KMS UEGO CAN User manual

KMS UEGO CAN controller manual
Version 1.02 1
KMS UEGO CAN controller
Part nr: 01-01-01-0009

KMS UEGO CAN controller manual
Version 1.02 2
This document contains detailed information about the KMS UEGO CAN
controller. Additional information, user manuals, wiring examples and software
can be found on our website: http://kms.vankronenburg.nl or on the software
CD included with the ECU.
1. Contents of the package
1 UEGO CAN controller (84mm long x 35mm width x 24mm height incl. connector)
1 UEGO CAN controller wiring loom (with connectors attached)
1 CAN extension hub 2m
1 Adapter (for easy ground fitting)
1 Welding bung stainless steel (M18 x1,5)
1 Instruction manual
1 Wide-band lambda sensor LSU 4.9
1 Contra connector (to attach the 3 pole connector)
2. Installation of the UEGO CAN controller
The KMS UEGO CAN controller is splash waterproof. However it’s best to place your KMS UEGO CAN
controller in a dry place where temperatures don’t exceed 65°C.
Warning: don’t place the UEGO CAN controller and wires near any ‘high powered’ cables (sparkplug
leads, etc), because of electrical interference.
Included with the KMS UEGO CAN controller is a wiring loom which consists out of a main connector
and four separate connectors with wires. The function and connection/wiring of these connectors is
as follows:

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Version 1.02 3
12 pole connector: Main connector
Connect to UEGO CAN controller
Pin Nr. KMS
Colour
Function
Details
1
Red
12V supply
2
Green
Can Low (-)
3
Black
Heater ground
4
Blue
Ipr
Sensor calibration
5
White
H-
Sensor heater ground
6
Red
Ip
Sensor Signal
7
Black
Ground
8
White
Can High (+)
9
White
Sensor signal
Analog signal output (type C)
10
Black
Un
Sensor reference voltage supply
11
Grey
H+
Sensor heater voltage supply
12
Yellow
Vm
Sensor reference ground
Single connector: heater ground
Connect to ground (chassis)
3 pole connector (superseal): power/ground for the CAN controller and analog signal
output to KMS ECU’s Connect as following:
Connector pin
Wire colour
Function
MD35 pin nr
MP25 pin nr
Pin 1
Red
+ 12V
12V Aux supply
12V Aux supply
Pin 2
White
Signal out
31: Lambda signal 1
32: Lambda signal 2
1: Lambda signal
4: Analog aux input
Pin 3
Black
Ground
23: ECU ground
25: ECU ground
6 pole connector: to lambda sensor
Connect to wide-band lambda sensor.

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4 pole connector: CAN connector
For connection to CAN display, ECU CAN input, etc.
Pin nr
Colour
Function
1
Red
12V supply
2
Black
Ground
3
White
Can High (+)
4
Green
Can Low (-)
Front of the male CAN connector: Front of the female CAN contra connector:
14 4 1
2 3 3 2
The CAN connection hub included in the package can be used to connect the KMS UEGO CAN
controller to the CAN bus. For every CAN device that’s connected to the CAN bus, a CAN connection
hub will be needed.
3. Wiring of the CAN bus
The KMS UEGO CAN controller can communicate via CAN communication through the CAN bus (grey
wire) which consists of two pair of twisted wires (green and white, red and black). Up to 10 CAN
devices may be connected to the CAN bus. These devices must be placed within 0,5m of the CAN
bus.
If the CAN Bus is connected to the KMS MP25, MA25(M), IA23 or FA23 ECU (using the serial to CAN
converter) or the KMS MD35 ECU, it is not necessary to use a CAN terminating resistor plug. The KMS
MD35 ECU and serial to CAN converter already have a terminating resistor. When using the UEGO
CAN controller separately on a standalone CAN bus (for example in combination with a KMS CAN
display), it is necessary to use a CAN terminating resistor plug on one end of the CAN bus. The
following page contains drawings showing the correct wiring of the CAN bus.

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Version 1.02 5
4. Installation of the lambda sensor
The lambda sensor used for the KMS UEGO CAN controller is a 6 wire LSU4.9 wideband Lambda
sensor. The sensor included in this kit has the following specifications:
Thread: M18x1,5
Spanner size: 22 Hexagon
Maximum continuous operating temperature: 930 °C
Maximum temperature: 1030 °C (maximum 10 minutes)
Mounting torque: 60 Nm max
Sensor warm-up will take about 20 seconds. Accurate measurement is possible when
exhaust gas temperature is at room temperature.
Sensor lifetimes differ for every application, but will dramatically decrease by the
following factors:
Leaded fuel
Contaminants such as silicon, lead, oil, etc. (use sensor-friendly sealants)
Exposure to exhaust fumes without any heating control active
Incorrect placement in the exhaust that can overheat the sensor (for correct
placement see page 5)
Warning: The Lambda sensors are factory calibrated with a trimming resistor placed in the sensor
connector, so the connector must not be cut off.
The Lambda sensor should be fitted to the exhaust system with the sensor tip in the exhaust gas
flow. When fitting the Lambda sensor, the following factors need to be taken into account:
Installation angle should be inclined at least 10° towards horizontal
(electrical connection upwards). Thus preventing the collection of liquids between
sensor housing and sensor element during the cold start phase.
For hot applications (temperature of hexagon above 500°C *) the thread boss should
be at least 13 mm or longer to avoid overheating of the protection tube welding and
to cool down the sensor hexagon.
Recommended material for the thread boss in the exhaust pipe : Temperature
resistant stainless steel.

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Version 1.02 6
Place the sensor at least 1 meter from the open end of the exhaust system to avoid
incorrect readings due to outside oxygen.
If possible, do not place the sensor near exhaust slip joints. It’s possible for some
applications to allow air to enter resulting in incorrect readings.
5. Software settings
Attention: After connecting the UEGO CAN controller,
the lambda control settings must be set up correctly.
When using the UEGO CAN controller to operate by CAN
communication, you must set it to KMS UEGO controller
CAN. When operating by serial (RS232) communication,
you must set the controller type to KMS UEGO controller
C-type. See appendix for signal voltages.
For adjustment of the lambda controller type, open the
KMS Motormanagement software, then go to options (F4)
Lambda control Lambda controller type KMS
UEGO controller CAN.
Using two or more CAN controller on the CAN bus, means
that the CAN controllers must be defined in the software.
Therefore you must first update the firmware. Please
contact us for the latest firmware update and
procedures. After updating the firmware set the lambda
controller to the right type, as described above. Next,
switch the ignition off and on. Then go to options (F4) 
CAN setting Search for devices. After the devices are
found, you can choose the functions (lambda 1, lambda
2, etc) for the different CAN devices.
6. AFR ratio
Lambda is a measure of the Air to Fuel Ratio (AFR) that is independent of the type of fuel being
used. The lambda value of the new UEGO CAN controller can vary between minimum 0,65 and
maximum 1,5 lambda. This means the Air to fuel ratio for petrol lies between 9,5 and 22,1. The
following table shows the AFR ratio’s for different fuels compared to the lambda value.

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Version 1.02 7
Lambda
Air to fuel ratio
Petrol
Diesel
LPG
E85
Methanol
0.65
9.6
9.5
10.1
6.3
4.2
0.70
10.3
10.2
10.9
6.8
4.5
0.75
11.0
10.9
11.6
7.3
4.8
0.80
11.8
11.6
12.4
7.8
5.1
0.85
12.5
12.3
13.2
8.3
5.4
0.90
13.2
13.1
14.0
8.8
5.8
0.95
14.0
13.8
14.7
9.3
6.1
1.00
14.7
14.5
15.5
9.8
6.4
1.05
15.4
15.2
16.3
10.3
6.7
1.10
16.2
16.0
17.1
10.8
7.0
1.15
16.9
16.7
17.8
11.2
7.4
1.20
17.6
17.4
18.6
11.7
7.7
1.25
18.4
18.1
19.4
12.2
8.0
1.30
19.1
18.9
20.2
12.7
8.3
1.35
19.8
19.6
20.9
13.2
8.6
1.40
20.6
20.3
21.7
13.7
9.0
1.45
21.3
21.0
22.5
14.2
9.3
1.50
22.1
21.8
23.3
14.7
9.6
1.55
22.8
22.5
24.0
15.1
9.9
1.60
23.5
23.2
24.8
15.6
10.2
7. Fault tracing
The UEGO CAN controller has a LED light for a simple fault tracing. The function of the LED light is
described below:
LED function
Problem
LED continuously on
- No problem, controller is ok and ready to be used.
1 puls
- Heating of the sensor, controller is ok but cannot be used until
heating is finished.
4 pulses
- Sensor short to 12 volt.
5 pulses
- Sensor not connected.
6 pulses
- Heater ground not connected (pin 3 of the 12 pole connector).

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Version 1.02 8
Appendix: Signal voltages serial communication