Innovate Motorsports LC-1 User manual

Document # 11-0053 11-0053 LC-1_Manual_1.6.doc
LC-1 Digital Air/Fuel Ratio (Lambda)
Sensor Controller Manual
Warning!
The Oxygen Sensor used in this device gets very hot in operation.
Do not touch the hot sensor. Do not let a hot sensor touch a
combustible surface. Do not use the sensor with or near flammable
liquids or gases. Failure to heed these warnings may result in severe
burns, explosions or fires.
When installed in the exhaust, the oxygen sensor MUST be
connected and operating with the LC-1 whenever the car is running.
An un-powered oxygen sensor will be quickly damaged when
exposed to hot exhaust gases.

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1Overview................................................................................................................................... 3
2Mounting and Connecting the LC-1 ......................................................................................... 4
2.1 Indicator LED and Calibration button hookup: .................................................................. 5
2.2 Connecting the LC-1 to an external analog AFR display.................................................. 5
2.3 Connecting the LC-1 to an ECU or data logger ................................................................ 5
2.4 Mounting the sensor using a Bung. .................................................................................. 6
2.5 How to fabricate a copper heat sink ................................................................................. 8
3First Time Use .......................................................................................................................... 8
4Calibration ................................................................................................................................ 9
4.1 Free air calibration ............................................................................................................9
4.2 Sensor heater calibration .................................................................................................. 9
4.3 Calibration Schedule....................................................................................................... 10
5Remote display and recording of Lambda and/or AFR.......................................................... 10
5.1 Analog Lambda/AFR instrument..................................................................................... 10
5.2 Digital XD-1 Instrument................................................................................................... 10
5.3 Laptop recording of AFR or Lambda .............................................................................. 10
5.4 Multi channel AFR recording with multiple LC-1’s and/or LM-1...................................... 11
6Programming the LC-1 ........................................................................................................... 12
6.1 Installing the LM Programmer Software ......................................................................... 12
6.2 Hooking up the LC-1 device to the computer ................................................................. 12
6.3 Resetting the calibration data ......................................................................................... 13
6.4 Updating the Firmware.................................................................................................... 13
6.5 Programming the analog outputs.................................................................................... 13
6.5.1 Advanced output programming................................................................................ 14
7Tips, Tricks and Troubleshooting ........................................................................................... 15
7.1 General measurement requirements .............................................................................. 15
7.2 Vehicles with ‘smog-pumps’............................................................................................ 15
7.3 Measuring at the tail-pipe................................................................................................ 15
7.4 Single Cylinder Engines.................................................................................................. 15
7.5 Diesel Engines ................................................................................................................ 15
7.6 Reference cell or Pump cell circuit open or shorted errors............................................. 15
7.7 Sensor Timing Errors ...................................................................................................... 16
7.8 Calibration tricks and hints................................................ Error! Bookmark not defined.
7.9 Analog Output tricks/hints ............................................................................................... 16
8Advanced Topics.................................................................................................................... 16
8.1 Connecting the LC-1 to simulate a narrow band oxygen sensor.................................... 16
Appendix A: LC-1 Cable Pinouts.................................................................................................. 18
Appendix B: LED blinking codes .................................................................................................. 19
Appendix C: LC-1 Error Codes and Troubleshooting Tips........................................................... 20
Appendix C: Limited Warranty...................................................................................................... 21
Revision History............................................................................................................................. 22

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1 Overview
The LC-1 is a stand-alone Wideband Controller used to measure the Air/Fuel Ratio (AFR) or
Lambda for an engine. For gasoline-driven engines, the theoretically optimal air fuel ratio is 14.7
pounds of air for every pound of fuel. At this ratio, theoretically, all available oxygen in the air
combines with all available fuel. This ratio is called the stoichiometric ratio. Stoichiometric for
different fuels are as follows:
Gasoline 14.7
LPG (Propane) 15.5
Methanol 6.4
Ethanol 9.0
CNG 17.2
Diesel 14.6
The measurement Lambda is the actual air fuel ratio over the stoichiometric ratio. A Lambda
measurement of “1” equates to the air fuel ratio of 14.7 (for gasoline engines). When Lambda is
less than 1 the engine runs “rich”, i.e., unburned fuel exists in the exhaust stream. If lambda is
greater than 1 the engine runs lean, i.e., free oxygen (02) is present in the exhaust. Depending on
the engine, maximum power is typically delivered when the engine runs slightly rich (for example
at lambda values of 0.8 to 0.9 for most engines). This instrument provides a means to measure
the actual air fuel ratio or lambda in the engine in operation directly from the exhaust. For this a
special wide-band oxygen sensor is used to measure the lambda value derived from the oxygen
content (or lack thereof) of the exhaust gases.

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2 Mounting and Connecting the LC-1
1. Find a suitable location under your vehicle where the LC-1 body can be mounted. Using
zip ties or other suitable method, fasten the body of the LC-1 device securely to the frame-
rails or other mounting points as far away from the heat of the exhaust system as the sensor
cable allows. DO NOT zip-tie the LC-1 by the cables.
2. Route the cables from the LC-1 (except sensor cable) into the car interior under the dash.
3. LC-1 Cable connections:
A. Interface and power cables with 7 stripped ends*:
a. Red 12V supply
b. Blue Heater Ground
c. White System Ground
d. Yellow Analog out 1
e. Brown Analog out 2
f. Green Analog Ground
g. Black Calibration wire
B. Serial In connection, 2.5mm stereo (female) marked as IN
C. Serial Out connection, 2.5 mm stereo (female) marked as OUT.
* 3.1 If you have an LC-1 with only 6 stripped ends (early production) the wiring is as follows:
a. Red 12V supply
b. Blue Heater Ground
c. Metallic System Ground
d. Yellow Analog out 1
e. Brown Analog out 2
f. Black Calibration wire
4. Connect the RED wire to a switched 12V source in your car. A switched 12V source
goes on as soon as the ignition on the car is on Make sure the connection is fused with a
minimum fuse size of 5A.
5. The BLUE, WHITE, and GREEN wires should all be grounded to the same ground source
and although these grounds are of the same source, the BLUE wire should be wired
separate from the WHITE and GREEN wires to avoid analog ground noise.
6. Optionally, the YELLOW (Analog out 1) and/or BROWN (Analog out 2) can be connected
to the analog inputs of other devices such as data loggers and ECUs. If either one or both of
these wires are not being used isolate and tape the wire(s) out of the way. Note: The LC-1’s
heater ground, system ground, and analog ground wires should be grounded at the
analog input’s ground.
7. Optionally connect a momentary push-button switch between ground and the BLACK
calibration wire. Please refer to section 2.1.
Note: The use of the calibration wire is not necessary if the LC-1 is connected to Innovate
Motorsports’ XD-1 digital gauge. If the wire is not are not being used, isolate and tape the
wire out of the way.
8. Optionally connect a indication LED (1.2-2.2V, 1-30mA is recommended) between the
calibration wire and ground. Please refer to section 2.1

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2.1Indicator LED and Calibration button hookup:
To monitor LC-1 status, connect the red wire (Anode) of the included LED to the calibration wire (black) of
the LC-1 and connect the black wire (Cathode) of the LED to the ground wire of the momentary switch.
a. Note: The included LED will fit the following hole size and panel thickness: a 5/32” (0.155” -
0.158”) hole size and a panel thickness of 28–16gauge (0.031” - 0.062”).
b. Optionally, any 1.2V - 2.2V (1mA- 30mA) LED may be used. A typical LED has 2 wires called
Anode and Cathode. The Cathode side is typically the shorter of the 2 wires (refer to the
component data sheet of the selected device for details).
Pressing the push-button or connecting it quickly to ground starts a free air calibration process in
the LC-1. MAKE SURE THE SENSOR IS IN FREE AIR FOR THAT. See chapter 4 for details.
2.2Connecting the LC-1 to an external analog AFR display
2.3Connecting the LC-1 to an ECU or data logger
All Innovate MTS devices like the LC-1 with dual serial ports should have their system grounds
connected together to a common ground point. If an external data logger or ECU is to be fed by
an MTS device, the MTS ground should be located at or near the ECU or data logger’s input
signal ground. Some ECU’s or data loggers have differential inputs. A differential input has a
separate ground INPUT for each sensor input. This ground input MUST be connected also to
ground as shown in these diagrams. If one analog output of the LC-1 is used to drive an AFR
display and the other output is used to connect to an ECU, the AFR display ground should be
connected to the ECU ground.

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7-wire LC-1 connection
6-wire LC-1 connections
2.4Mounting the sensor using a Bung.
Using a bung is the preferred method for mounting the O2sensor for both catalytic and
non-catalytic cars.
On CATALYTIC CONVERTER equipped vehicles:
Install the oxygen sensor’s bung upstream from the catalytic converter (a bung and plug is
included in the LC-1 kit). Any decent muffler or exhaust shop can do this for you. The wide-
band oxygen sensor is then installed into the bung to take a reading. (Insert the plug into the
bung when not in use). The bung must be installed in the exhaust pipe at the side or on
top, NOT on the bottom of the exhaust pipe.Best position is between 10:00 and 2:00
position.

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On NON-CATALYTIC converter vehicles:
You have the option with non-catalytic cars to also use a Bung as described above. Use of a
bung is the preferred method for mounting the 02sensor for both catalytic and non-catalytic
cars.
On TURBO CHARGED vehicles:
Install the bung downstream from the turbo before the catalytic converter. The high exhaust
pressure before the turbo interferes with the lambda measurement and the high exhaust
temperatures encountered there can damage the sensor.
Do NOT install the Bung below the 3 o'clock or 9 o'clock position.
Condensation can form in the exhaust pipe and permanently damage the sensor.
6 o’clock is the absolute worst position to mount the sensor.
Wide band oxygen sensors – like the one shipped optionally with the LC-1
– are designed to work with unleaded gasoline. Using them with leaded gasoline
will significantly reduce the lifespan of the sensor. The reduction is directly
proportional to the metal content of the fuel. In most cases, a wide band sensor
will provide accurate measurements somewhere between 50 hours and 500 hours
with leaded fuel.
WHEN INSTALLED IN THE EXHAUST, THE OXYGEN SENSOR
MUST BE CONNECTED AND OPERATING WITH THE LC-1
WHENEVER THE CAR IS RUNNING. AN UN-POWERED OXYGEN
SENSOR WILL BE DAMAGED WHEN EXPOSED TO EXHAUST GAS.
The maximum temperature of the sensor at the bung (the sensor hexagon)
should not exceed 500 oC or 900 oF. If these temperatures are exceeded in your
application you should either install a copper heat sink (instructions below) or the
Innovate Motorsports Heat-Sink Bung extender (HBX-1).
The bung extender is recommended for situations where airflow is restricted or
the encountered heat is higher than a heat sink can handle.
It is NOT a good idea to connect the LC-1 permanently to 12V and switch it
on with a separate switch before the vehicle is started. Depending on the climate
and the sensor position in the exhaust, condensation water can form in the

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exhaust pipes. This condensation water could then be blown by the exhaust
stream against the hot sensor when the car is started. The resulting heat shock
can permanently damage the sensor.
2.5How to fabricate a copper heat sink
Use a 4” x 4” (10cm x 10 cm) sheet of copper sheet metal 14ga (1.5mm) thick. Drill a hole in the
center with the same diameter of the oxygen sensor threads ~3/4” (19mm).
Fold the sides up 45 deg and mount it between the sensor and the bung like you would a big
washer. Orient it such that the sides are exposed to good airflow.
3 First Time Use
1. Do not connect the sensor yet.
2. Switch 12V supply to the LC-1 on and wait for 10 seconds.
3. Switch the 12V supply off after 10 seconds.
4. Connect the sensor to the sensor interface connector. The sensor must be exposed to air
for the first time calibration.
5. Switch the LC-1 on and wait for 2 minutes.
If you connected a LED to the calibration button, you will at first see the LED blink slowly and
steadily. If it blinks for a fixed number of pulses, then switches off for 2 seconds and then repeats,
you have an error code. See Appendixfor details.
Slow and steady blinking indicates that the sensor is warming up to its optimum operating
temperature. The warm-up period will last for about 30 seconds for a cold sensor, depending on
the sensor type used.
After the sensor is warmed up the meter automatically calibrates the sensor heater controller to
the particular sensor. During this 20-second period the LC-1 collects and calculates sensor
specific data required to quickly reach operating temperature in the future. After the first time use

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the meter will use these values to regulate the sensor's temperature. During the heater calibration
the optional LED will blink fast and steady.
After that period the LC-1 will automatically perform a free air calibration. During this 2 second
period a connected LED will go off. The LC-1 will now calibrate itself by using air as a reference
gas with known oxygen content.
After the free air calibration is finished the LED should light up steady and continuously,
indicating correct operation of the LC-1.
4 Calibration
There are two types of calibration for the LC-1: free air calibration and sensor heater calibration.
Sensor heater calibration and first free air calibration is automatically performed the first time a
new sensor is used, while free air calibration should be executed frequently.
4.1Free air calibration
To achieve maximum precision, the LC-1 and its sensor needs to be recalibrated frequently.
The sensor MUST be operated in free air for calibration.
If the wide-band sensor is installed in a vehicle, wait 6-8 hours after running the engine so that all
exhaust gas is dissipated from the exhaust tract of the vehicle. Better yet, disengage the oxygen
sensor and expose the sensor to air (away from the exhaust) for calibration purposes:
1. Connect the LC-1 to 12V from the vehicle and switch it on.
2. After the sensor has warmed up, either press the pushbutton or connect the calibration wire
to ground for a brief period.
3. After the calibration is complete, switch the LC-1 off and wait for 30 seconds before you start
the car.
If a LED indicator is connected to the calibration wire, it will be off during free air calibration.
4.2Sensor heater calibration
If you change the sensor – either with a replacement sensor or a new type of sensor --, the
heater circuit of the LC-1 needs to be recalibrated as well. (See steps in chapter 4 'First Time
Use'). The heater calibration data in the LC-1 will be reset when the device is operated from 12V
without a sensor connected for at least 5 seconds. You can force a reset by doing this, and then
recalibrate by turning the unit off, reconnecting the sensor, and turning the unit on.
After the sensor is warmed up the meter automatically calibrates the sensor heater controller to
the particular sensor. During this 20-second period the LC-1 collects and calculates sensor-
specific data required to quickly reach operating temperature in the future.
Note: When using the Bosch Sensors the LC-1 may perform multiple calibration passes.
This is normal and need not cause concern. When it completes, the LC-1 also will perform
a free air calibration. Make sure the sensor is operating in free air for the heater and free
air calibration.

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4.3Calibration Schedule
Normally aspirated daily driver:
- Calibrate before installation of new sensor
- Calibrate new sensor again after 3 month of use
- Thereafter calibrate once a year or every 20,000 miles, whichever comes first
Turbo car, daily driver (tuned rich):
- Calibrate before installation of new sensor
- Calibrate new sensor again after 3 month of use
- Thereafter calibrate twice a year or every 10,000 miles, whichever comes first
Race car
- Calibrate before first installation of new sensor
- Calibrate once per race weekend
Dyno use
- Calibrate a new sensor
- Calibrate every 2-3 days, depending on usage
5 Remote display and recording of Lambda and/or AFR
In many applications it may be desirable to monitor the air-fuel data remotely using a dash-
mounted instrument. The LC-1 provides two options for that application.
5.1Analog Lambda/AFR instrument.
There are many analog lambda/AFR displays on the market. They are essentially voltmeters for a
voltage between 0 and 1 V and measure the analog voltage of a narrow band oxygen sensor.
Some are true analog instruments while others provide a LED bar. Because of the very limited
sensing range of a narrow band sensor they are essentially useless as true AFR meters. With the
LC-1, connecting these meters to the second analog output of the LC-1 allows them to be used
as true remote AFR meters, provided the LC-1 analog output is programmed to the
characteristics of the used meter. The LC-1's analog output 2 is factory programmed to provide a
linear output between 0V and 5V for an AFR of 7.35 to 22.39. Any other linear output range
between 0 and 5V can be programmed. See chapter 6.5: Programming the analog outputs for
details.
5.2Digital XD-1 Instrument
1. Connect the Serial OUT connection (unmarked) to the Serial IN connection of the XD-1
(marked) with the included 2.5mm to 2.5mm cable. Make sure the XD-1 is programmed as
AFR instrument for the first channel like for an LM-1.
2. Connect the terminator plug (2.5mm male plug with no cable) into the Serial IN connection of
the LC-1.
3, If real-time recording with the Innovate LogWorks software, connect the included 2.5mm stereo
to DB-9 cable to a serial port on your laptop.

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5.3Laptop recording of AFR or Lambda
1. If real-time recording with the Innovate LogWorks software, connect the Serial OUT connection
(unmarked) with the included 2.5mm stereo to DB-9 cable to a serial port on your laptop.
2. Connect the terminator plug (2.5mm male plug with no cable) into the Serial IN connection of
the LC-1.
5.4Multi channel AFR recording with multiple LC-1’s and/or LM-1
If multiple LC-1’s are used, connect the Serial OUT of the first LC-1 to the Serial IN of the next
one. Connect the serial out of that one again to the Serial IN of the next one and so on.
Connect the laptop computer to the Serial OUT of the last LC-1 in the chain.
The first LC-1 in the chain MUST have its Serial IN plugged with the
terminator plug.
If an LM-1 is used as well, it MUST be the first device in the chain. The Mini-DIN8 to serial cable
(P/N: 3759, not included) allows you to connect the Serial Port of the LM-1 to the Serial IN of the
first LC-1.

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6 Programming the LC-1
The LC-1 is programmable with the following functionality:
1. Change the relationship between Lambda and AFR.
2. Upgrade and change the software.
3. Change the output characteristics of the Analog outputs.
6.1Installing the LM Programmer Software
Put the included CD in your CD-drive on your computer and follow the instructions on screen.
The Software will be installed including pre-set directories for log-data and downloaded software.
The LM Installer also puts entries for the LM Software in the Start-Menu of your computer under
the heading ‘LogWorks2’.
6.2Hooking up the LC-1 device to the computer
Follow the instructions in chapter 6.1 to hook up the LC-1 to the computer.
Start the LM-Programmer software. The screen should look like this:
On this page you can see the software version of the LC-1 and you can change the multiplier to
calculate AFR from Lambda. A number of different multipliers are already pre-selectable but you
can change it to a custom one for the particular fuel you are using.

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If you plan to use multiple LC-1’s, change the device name to something identifying which LC-1 is
connected where. For example LC1-Cyl1 for a LC1 connected to Cylinder 1. The device name
can be up to 8 characters long.
6.3Resetting the calibration data
Press the Reset Calibration button if you want to reset all calibration data in the LC-1.
This will clear all calibration data of the LC-1.
6.4Updating the Firmware
Click the 'Update Firmware' in the main page to upgrade to the latest firmware for the LC-1.
Firmware for the LC-1 has the extension dld. You can also download the latest firmware and
software (LM Programmer and Demo) from the Innovate! Motorsports web-site at
http://www.tuneyourengine.com
If your computer crashes during a firmware upgrade, the LC-1 has a recovery mechanism where
it will be able to retry the download again and not be disabled by half loaded firmware. Switch the
LC-1 off and on again and then try to restart the LC1 Manager software. The recovery
mechanism is designed to be able to recover 99.9% of the time. While we don’t anticipate this
occurring, it is possible that the LC-1 will not recover correctly and may need to be serviced at
our factory. If you suspect this is the case, contact Innovate support.
6.5Programming the analog outputs
Select one of the Analog output tabs. The Analog output page looks like this:
This shows the analog output voltages versus Lambda for one of the two analog outputs. The
graph display is automatically scaled to the selected voltages. For each output you can specify a

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minimum and maximum lambda value and the associated voltages. Below the minimum and
above the maximum lambda values the output voltages stay constant at the associated
programmed voltage.
By selecting the ‘use Air-Fuel-Ratio’ button you can program the curve by AFR instead of
Lambda. This does not change the programming, only the representation of the data.
When programming by AFR the LM Programmer converts the number to Lambda before
programming the LC-1.
Click the Program button to download the new data into the LC-1.
As factory programmed the first output simulates a typical narrow band oxygen sensor. The
second output is programmed to output between 0 V for an AFR of 7.35 (gasoline) and 5.0V for
an AFR of 22.39. Other curves of course are easily programmable
6.5.1 Advanced output programming
The normal state of the analog outputs is to update the outputs every time the LC-1 takes a new
measurement. The LC-1 is fast enough to distinguish individual pockets of exhaust gas. For
many applications this will be too fast. The advanced programming allows to set the analog out
update speed.
Press the “Advanced button” to set the advanced analog out settings. The following dialog box
will appear:
When setting the LC-1 to the slower response speed settings the measured mixture data will be
averaged over the response time setting before being output.
You can also specify what output voltage is visible on the analog outputs during warm-up of the
sensor and during error conditions.
The ‘High Impedance’ setting allows to specify that the analog outputs do not drive the output
during warm-up or error condition. They will be free floating. This is important for more closely
simulating a narrow band sensor. Many EFI systems monitor the impedance of a narrow band
sensor during engine warm-up to determine sensor readiness. A narrow band sensor that’s too
cold will have a high impedance.

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7 Tips, Tricks and Troubleshooting
7.1General measurement requirements
The LC-1 measures the air-fuel-ratio by measuring the amount of oxygen in the exhaust (for lean
conditions) or the amount of unburned or partially burned fuel (for rich conditions). You should
correct for the following in order to get optimum results from the LC-1
1) An exhaust leak will allow oxygen to enter the exhaust stream and therefore will
measure leaner than the engine is actually running. For correct measurement, air-
leaks in the exhaust MUST be prevented under all circumstances.
2) Missing ignitions (where the air-fuel mixture does not ignite) also pump unburned
oxygen into the exhaust and cause the LC-1 to measure lean.
3) The only circumstance where the LC-1 will measure richer than the engine is running
is if the pressure in the exhaust tract is excessive (and the engine is running on the
rich side to begin with).
7.2Vehicles with ‘smog-pumps’
Older fuel injected vehicles with a ‘smog-pump’ actually inject air into the exhaust stream to aid
their catalytic converter in the burn-up of unburned or partially burned fuels. This additional air will
make the exhaust look leaner than the engine is running. For an accurate measure, install the
LC-1 sensor up-stream of the outputs of the smog-pump. If this is not possible, temporarily
disable the smog-pump by removing its drive belt.
7.3Measuring at the tail-pipe
On non-catalytic converter equipped vehicles it is possible to measure the air-fuel-ratio at the tail-
pipe. It is highly recommended to use the optional LM-1 Exhaust Clamp. Without it too much
outside air may enter the exhaust, especially at idle, to prevent correct measurements and
leading to a lean measurement. Sticking the sensor itself into the exhaust pipe can yield
inconsistent results because the sensor will not have outside air available as a reference gas and
its reaction time becomes so slow that the LC-1 will report a sensor timing error. The oxygen
sensor needs to have the back part of the sensor (where the wires enter the sensor) exposed to
outside air.
7.4Single Cylinder Engines
These kinds of engines are difficult to measure at the tail-pipe. The oscillations of the exhaust
gas are so large that a lot of outside air enters the exhaust and prevents correct measurement.
Sometimes it helps to just wrap a piece of heat resistant cloth around the exhaust clamp to
prevent outside air from entering the exhaust.
7.5Diesel Engines
Diesel Engines and gas turbines run at wide open throttle at all times. They do not have a throttle
but regulate power by the amount of injected fuel. The LC-1 can still be used, but measurements
at idle will read as lean.
7.6Reference cell or Pump cell circuit open or shorted errors

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Under some rare circumstances it is possible that the heater calibration data in the LC-1 can
become partially destroyed. This can manifest in the above-mentioned errors. Follow the steps in
chapter 4 ‘First time use’ to reset the heater calibration data.
7.7Sensor Timing Errors
These errors are typically encountered when the sensor does not have outside air available as
reference gas. If you encounter this error, restart the LC-1 and operate the sensor in free air. If
you still encounter this error, the sensor may be bad and needs to be replaced.
Replacement sensors are available from your nearest VW dealer under the VW part-number
021-906-262-B or direct from Innovate Motorsports.
Sensor timing errors are also common when the sensor overheats. Relocate the sensor further
downstream in the exhaust, install a heat sink or Heat-Sink Bung extender (HBX-1).
Sometimes it’s possible to encounter Error 08 when the exhaust gas suddenly gets too rich.
Normally the LC-1 will display a ‘too rich’ indication if the exhaust gas is too rich. If the mixture
gets rich very suddenly, the LC-1 cannot distinguish between a too rich condition and a sensor
timing error.
7.8Analog Output tricks/hints
Sometimes there is a ground offset between the device that receives the analog output voltage
and the LC-1. This can be especially true if the System ground is not connected to the same
ground as the measurement device using the analog out. Both devices reference different
grounds and therefore see different voltages. So to compensate for the ground offsets the analog
output voltage points have to be shifted by the ground offsets. To measure what the real ground
offset is, you can program the analog outputs temporarily to output a flat line voltage by entering
the same voltage in both fields for the two analog out programming points. This way the analog
output voltage will be fixed, independent of current AFR and can therefore be measured and
compensated for easily.
To log analog outputs from the LC-1 into an LM-1, simply connect analog output #2 (brown wire)
to an available input on the LMA-2 (RPM converter Aux. In Cable) or LMA-3 (5-sensor “AuxBox”).
Set LogWorks inputs match the LC-1 outputs. As discussed in section 7.6 above, factory settings
for the second output is programmed where 0V=.5λ(AFR of 7.35 for gasoline) and 5.0V=1.523λ
(AFR of 22.39 for gasoline).
Note:
The analog outputs are NOT designed to power other devices or sensors.
So using the flat-line setting at 5V and expecting to power a sensor from it
will not work and can damage the LC-1.
8 Advanced Topics
8.1Connecting the LC-1 to simulate a narrow band oxygen sensor.

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It is possible to install the wide-band sensor in place of the OEM oxygen sensor. In this case the
meter's analog output signal will replace the OEM oxygen sensor's signal to the fuel injection
computer. EFI equipped cars typically incorporate a narrow band oxygen sensor. These sensors
are typically 1, 2, 3 or 4 wire sensors.
The analog output connector of the LC-1 can simulate the operation of a narrow band sensor
while the wide-band oxygen sensor is installed in place of the OEM narrow-band sensor. Factory
equipped Analog output 1 of the LC-1 is programmed to simulate a narrow band sensor. Some
vehicles are equipped with oxygen sensors that do not produce an output voltage but change
their resistance depending on exhaust gas content. These sensors cannot be simulated. They
are used in less than 1% of all vehicles. Refer to your vehicles specifications if you think that
your vehicle may be in this category. The same is true for vehicles already factory equipped with
a wide-band oxygen sensor. These cannot be simulated either.
Some EFI-computers will create a fault when the heater power wires of the oxygen sensor are
disconnected. In this case mount the old oxygen sensor in a safe place (but not necessarily in the
exhaust) and connect the heater wires to it to keep the EFI-computer happy.
Be careful where you mount the stock sensor, as heated sensors will get
hot.
To connect the LC-1 to the EFI-computer, first determine what kind of narrow band sensor is
used, then follow the instructions below (you will need a digital multimeter to determine correct
OEM sensor wires):
a. Vehicle has a 1-wire sensor:
Wire analog output 1 directly to the wire.

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b. Vehicle has a 2-wire sensor:
While the engine is off determine which of the 2 wires has a low resistance between the wire and
the sensor body. This is the heater power for the sensor. Wire analog output 1 directly to the
other wire. Leave the heater power wire unconnected but make sure it cannot ground itself or see
above.
c. Vehicle has a 3-wire sensor:
Typically the 3 wires are: heater power, Ground, and sensor element connection.
Generally they have 1 black wire and 2 white wires. Connect the black wire from the EFI
computer to analog output 1 of the meter. Leave the other wires unconnected but make sure they
cannot contact any metal parts or see above. If the wiring colors are different, then heater power
can simply be determined by measuring the voltage on the wires when the engine is running. The
wire showing 12V or more is the heater power. The sensor element connection voltage fluctuates
around 0.45V when the car is warmed up. Wire analog output 1 directly to this wire. The Ground
connection has low resistance to chassis ground (less than 1 Ohm). Measure while the engine is
off.
d. Vehicle has a 4-wire sensor
Typically the 4 wires are: heater power, heater ground, sensor ground, and sensor element
connection. Proceed as for the 3-wire sensor.
Appendix A: LC-1 Cable Pinouts
A1. Sensor Interface Connector (Standard DIN-5 female)
Lambda Meter Signal Wire Colors Wire Colors
Bosch LSU4.2 NTK L1H1
1 Pump+ red white
2 Sens+ black red
3 Heater - white yellow
4 Pump-/Sens- yellow black
5 Heater + gray orange

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Appendix B: LED blinking codes
1. Blinking steady about 2 times/second: Warming up
2. Blinking steady at about 4 times/second: Heater calibration
3. LED off No Power or free air calibration
4. Blink sequence with 2 second pause Error indication
Error indication details:
Count the number of fast flashes between 2 second pauses. The number of flashes indicates the
error code as in
1 Flash Error 1
2 Flashes Error 2
And so on. See Appendix C for error code details.

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Appendix C: LC-1 Error Codes and Troubleshooting Tips
Error
Code Error Message Likely Root Cause Fix
Error 1 Heater circuit shorted 1. Short in cable
2. Short in sensor
1. Repair/replace cable.
2. Replace sensor.
Error 2 Heater circuit open 1. Damaged sensor cable or
Cable connector not fully
seated
1. Verify Sensor connector is
fully seated into unit.
Repair/replace Sensor or
cable.
Error 3 Pump cell circuit shorted 1. Short in sensor cable
2. Short in sensor
3. Sensor heater calibration
incorrect
4. Sensor overheating
5. EGT >1700º F
1. Repair sensor cable.
2. Replace sensor.
3. Perform sensor heater
recalibration.
4. Move your sensor bung as
far downstream as possible
OR add a heatsink to isolate
the sensor from the pipe.
Error 4 Pump cell circuit open 1. Damaged sensor cable or
sensor connector not fully
seated
2. Sensor heater calibration
incorrect
1. Verify sensor connector is
fully seated into unit.
Repair/replace cable.
2. Perform complete heater
calibration (not just free air
calibration). See section 4
Error 5 Reference cell circuit
shorted
1. Short in sensor cable
2. Short in sensor
1. Repair sensor cable.
2. Replace sensor.
Error 6 Reference cell circuit open 1. Damaged sensor cable or
sensor connector not fully
seated
2. Damaged Sensor
1. Verify sensor connector is
fully seated into unit.
2. Replace sensor
Error 7 General System error
(typically a software error).
Typically a software error Reboot LC-1 by cycling power.
Re-flash unit if necessary.
Error 8 Sensor Timing error
(typically a damaged
sensor).
1. Sensor overheating.
(The Bosch LSU4.2 is rated
to operate at a sensor
housing temperature of < 900
degrees (measured at the
bung) for maximum accuracy
and control. When this
operating temperature range
is exceeded, the sensor can
no longer be accurately
controlled. )
2. Sensor is damaged
1. a. Perform sensor heater
recalibration; b. Move your
sensor bung as far
downstream as possible. Right
before the cat, or 2-3 feet from
the end of the tailpipe are good
locations; c. Add a heatsink to
isolate the sensor from the
pipe. The HBX-1 is an
available accessory.
2. Replace sensor.
Error 9 Supply Voltage too low Supply voltage too low for
sensor regulation
Check your 12V connection for
corrosion.