MoTeC LTC User Manual
Contents
Introduction .............................................................................. 2
Installation ................................................................................ 4
LTC Installation ..................................................................................... 4
Lambda Sensor Installation .................................................................. 4
LTC Manager Software Installation ...................................................... 6
Configuration ........................................................................... 8
Introduction ........................................................................................... 8
Setup..................................................................................................... 8
Calibration ........................................................................................... 13
Firmware ............................................................................................. 16
Operation ................................................................................ 17
Monitoring LTCs ................................................................................. 17
MoTeC Data Loggers ......................................................................... 20
MoTeC 'Hundred Series' ECUs .......................................................... 21
Lambda and Air Fuel Ratio ................................................................. 24
LTC Operating Tips ............................................................................ 26
Appendices ............................................................................ 27
Appendix A – Specifications ............................................................... 27
Appendix B – Pinout ........................................................................... 28
Appendix C – Dimensions .................................................................. 30
Appendix D – Wiring Details ............................................................... 33
Appendix E – LTC CAN Messages ..................................................... 36
Appendix F – Lambda to Air Fuel Ratio Table .................................... 39
Copyright 2011 – MoTeC Pty Ltd
The information in this document is subject to change without notice.
While every effort is taken to ensure correctness, no responsibility will be taken for the
consequences of any inaccuracies or omissions in this manual.
V1.5 15 September 2011
2 Introduction
Introduction
MoTeC LTCs (Lambda to CAN) monitor and control Wideband Lambda
sensors and transmit Lambda readings and diagnostics on a CAN bus. There
are single channel LTC and Dual channel LTCD available to suit either Bosch
LSU4.9 or NTK sensors:
• #61300 – Single channel Bosch LSU 4.9 Sensor
• #61301 – Dual Channel Bosch LSU 4.9 Sensors
• #61304 – Single Channel NTK Sensor
• #61305 – Dual Channel NTK Sensors
Up to 32 Lambda sensors can be configured on a single CAN bus using LTCs,
allowing an ECU or Data Logger to simultaneously monitor multiple Lambda
sensors.
Throughout this manual the LTC, LTCD, LTC-N and LTCD-N will be referred to
as LTC except where details specific to a particular model are discussed.
Features
• Accurate Lambda measurement even when the exhaust gas temperature
is changing rapidly (heating or cooling)
• Ability to perform free air sensor calibration or use the initial sensor factory
calibration. LTC-N has the ability to be calibrated against a test gas.
• Pre-configured to work in a single LTC or LTCD installation, without
requiring configuration with a PC
• LTC Manager software to:
o configure and calibrate all LTCs on the CAN bus
o display readings and diagnostics
o configure the CAN transmission address of each LTC
o control free air calibration
o update LTC firmware
Compatibility
• MoTeC ‘Hundred series’ ECUs: M400, M600, M800 and M880
• MoTeC M1 Series ECUs
• MoTeC Data Loggers : SDL, SDL3, ADL, ADL2, ADL3, ACL
MoTeC Introduction 3
Accessories
• #57006 Bosch LSU 4.9 Lambda Sensor
• #57007 NTK Lambda Sensor
• #61059 MoTeC UTC - USB to CAN, used to communicate to the PC
(optional)
Note: LTC is not compatible with MoTeC's CAN cable (part number
61021)
4 Installation
Installation
LTC Installation
The LTC can be mounted to a flat surface using the two mounting holes.
The LTC should be mounted as far as possible from the exhaust to avoid
excessive heat.
Note: LTC maximum ambient temperature is 100 °C.
Use Connector A to connect the single LTC to the Lambda sensor. Use
connectors A and B to connect the LTCD to two Lambda sensors. Use the
Power/CAN Connector to power the LTC and connect to the CAN bus.
See Appendices for more details.
Lambda Sensor Installation
Warning: The Bosch LSU 4.9 Lambda sensors are fitted from the factory with
a calibrated trimming resistor embedded in the sensor connector. If the factory
sensor connector is cut off and replaced with another type, the LTC will not
operate correctly.
Note: Unlike the Bosch LSU 4.9 the NTK sensors standard connector can be
removed and replaced by a non-standard connector without affecting the
performance of the sensor or the LTC-N. However, the initial factory calibration
method will not work as the calibration resistor is built into the original
connector. In this case Free Air calibration is required. It is recommended that
no wiring modification is made to the NTK sensor or LTC-N unless completely
necessary.
The Lambda sensor should be fitted to the exhaust system with the sensor tip
protruding into the exhaust gas flow. The following considerations should be
taken into account when fitting the sensor:
• Place the sensor on an angle between 10 and 90 degrees to the vertical
with the tip of the sensor pointing down to prevent condensation build up
between the sensor case and the sensor ceramic.
• Do not place the sensor in a vertical position; excess heat soak will prevent
proper operation.
• Place the sensor at least 1 meter from the exhaust ports to avoid
excessive heat (recommended).
MoTeC Installation 5
• Place the sensor at least 1 meter from the open end of the exhaust system
to avoid incorrect readings due to outside oxygen (recommended)
o Where necessary for shorter exhaust systems the sensor could be
placed closer to the engine.
• Place the sensor away from the flame front coming out of the cylinder head
and away from areas where one cylinder may have more effect than
another.
Correct sensor placement
• If possible, do not place the sensor near exhaust slip joints; some designs
allow air to enter resulting in incorrect readings.
If the sensor has to be placed near a slip joint, reverse the slip joints to
reduce the influence of introduced air.
Introduced air No air introduced
Exhaust flow
Exhaust slip joint design
Incorrect sensor
placement
6 Installation
LTC Manager Software Installation
The LTC Manager software is required for configuration and calibration of LTC
units. The software must be installed on Windows XP or Windows Vista. The
same software package is used for the LTC, LTCD, LTC-N and LTCD-N.
Note: The LTC Manager software is not required if using a single LTC or
LTCD unit preconfigured by MoTeC.
MoTeC Installation 7
Install LTC Manager Software
• Go to the MoTeC website at www.motec.com and navigate to downloads >
software > latest releases > LTC Manager
OR
Locate LTC Manager installation file on the MoTeC Resource Disc
• Save the LTC Manager installation file in your preferred location (for
example desktop)
• Double click the saved file to run the installer
• Follow the installation instructions on the Install Shield Wizard
• To start the program after installation,
double click the LTC Manager icon on the desktop
OR
Click Start > All Programs > MoTeC > LTC > LTC Manager
Updating Software
Software updates are available free of charge, giving access to the latest
features for the life of the device. Download the latest software versions from
the website and follow the software installation instructions to update to the
new version.
To update the associated firmware in the device see Firmware.
8 Configuration
Configuration
Introduction
Note: LTC units come pre-configured to suit a single LTC or LTCD unit
installation using the initial factory sensor calibration.
The default CAN address for the singular LTC is hex 460.
The default CAN addresses for LTCD is hex 460 for Lambda sensor 1 and hex
461 for Lambda sensor 2.
LTC Manager is used to individually configure and calibrate the connected LTC
units. Configuration using LTC Manager is only necessary if installing multiple
LTC units or if changes to the default settings are required.
All LTC configuration and calibration operations are performed directly on an
LTC and configurations are not stored on disk.
Start LTC Configuration
• Connect the unit to the PC (see Appendix D – Wiring Details)
• Ensure the unit is powered
• Start LTC Manager
o Click the LTC Manager icon on the desktop
OR
o Click Start > All Programs > MoTeC > LTC > LTC Manager.
The main LTC Manager window displays the live configuration and status of all
LTC units present on the connected CAN bus.
Setup
CAN Address
The CAN setup determines which CAN address (specified in hex) the LTC
uses to transmit readings and diagnostic information. The format of the CAN
messages is described in. Appendix E – LTC CAN Messages
Each LTC on a CAN bus must be configured with a unique CAN address.
See
Operation for information on configuring a MoTeC Data Logger or ECU to
receive LTC CAN messages.
MoTeC Configuration 9
LTC Unit Setup
• To open the LTC Setup window, double click the row in the table
containing the LTC or click the row and click Setup.
• Select the Recommended Address check box and enter one of the
addresses in the drop down box to communicate with MoTeC products
such as Data Loggers or 'hundred series' ECUs.
The recommended address range for LTC messages is hex 460 to hex
47F.
OR
Select the Custom Address check box and enter an address (in hex) for
interfacing with third party equipment.
OR
Select Disabled to prevent an LTC from transmitting CAN messages.
While disabled an LTC will not heat the sensor or perform Lambda
measurements.
Note: Lambda sensors should not be left in the exhaust system of a
running engine if they are not being controlled. A disabled sensor in a
running engine can be damaged.
• In the Name area the default name will appear. The default name matches
the selected CAN Address (LTC1 etc.). If required the user can specify a
custom name (e.g. Left Bank or Cylinder 4).
Tip: The rows in the main LTC Manager window are sorted by the Name
column.
10 Configuration
• Click OK. The configuration updates will be sent to the LTC, this may take
several seconds
LTC-N Unit Setup
• To open the LTC Setup window, double click the row in the table
containing the LTC or click the row and click Setup.
• Select the Recommended Address check box and enter one of the
addresses in the drop down box to communicate with MoTeC products
such as Data Loggers or 'hundred series' ECUs.
The recommended address range for LTC messages is hex 460 to hex
47F.
OR
Select the Custom Address check box and enter an address (in hex) for
interfacing with third party equipment.
OR
Select Disabled to prevent an LTC from transmitting CAN messages.
While disabled an LTC will not heat the sensor or perform Lambda
measurements.
MoTeC Configuration 11
Note: Lambda sensors should not be left in the exhaust system of a
running engine if they are not being controlled. A disabled sensor in a
running engine can be damaged.
• In the Name area the default name will appear. The default name matches
the selected CAN Address (LTC1 etc.). If required the user can specify a
custom name (e.g. Left Bank or Cylinder 4).
Tip: The rows in the main LTC Manager window are sorted by the Name
column.
• Select a Standard Sensor type from the drop down menu
OR
Select a Custom Sensor
Note: Custom sensor setups are for advanced users and it is not
recommended for general use.
• Select a Standard Output Table, generally Lambda to three decimal
places
OR
Use a Custom Table for another type of fuel, e.g. Diesel.
• Click OK. The configuration updates will be sent to the LTC, this may take
several seconds
LTC-N Output Table
The standard output table for the LTC-N is for Lambda to three decimal places.
It is possible for the user to make a custom table to suit the Air/Fuel ratio of any
fuel.
12 Configuration
When the Edit button is clicked under Output Table a table of Normalized
Current appears. The standard Lambda values appear in the Output column,
these numbers can be modified to reflect Air/Fuel ratio of a specific fuel. See
Appendix F for details of common fuels.
Custom tables can be saved using the Save As button.
CAN Collect Functionality
CAN Collect functionality allows one LTC (the CAN Collect Master) to collect
CAN data from up to 15 other slave LTCs, and retransmit these Lambda
readings on a single CAN address (see Appendix E – LTC CAN Messages).
Note: A CAN Collect Master device will continue to transmit the standard LTC
messages in addition to the special collect master messages.
CAN Collect functionality requires only a single CAN address to be configured
on a MoTeC Data Logger to receive up to 16 Lambda readings.
See Operation for information on configuring MoTeC Data Loggers or ECUs to
use CAN Collect.
Configure Master and Slave Units
• To configure an LTC as the CAN Collect Master device, select the CAN
Collect Master check box and select a CAN address.
The CAN address for the Master device is the address on which the
collected Lambda values will be retransmitted. This address must end in a
zero (i.e. hex 460, 470 etc). The recommended address is hex 460.
• To configure an LTC as a CAN Collect Slave device, clear the CAN
Collect Master check box and select a CAN address.
The CAN address for a Slave device must be configured with one of the 15
addresses following the master address. For example, if the collect master
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