Table of Contents
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MoTeC
Contents
Introduction .............................................................................. 2
Installation ................................................................................ 4
LTC Installation ..................................................................................4
Lambda Sensor Installation ................................................................4
LTC Manager Software Installation ....................................................6
CAN Bus Interface ................................................................... 7
Configuration ........................................................................... 9
Introduction ........................................................................................9
Setup .................................................................................................9
Calibration ....................................................................................... 16
Firmware ......................................................................................... 19
Operation ................................................................................ 20
Monitoring LTCs .............................................................................. 20
MoTeC Data Loggers ....................................................................... 24
MoTeC M1 ECUs ............................................................................. 25
MoTeC 'Hundred Series' ECUs ........................................................ 26
Lambda and Air Fuel Ratio............................................................... 28
LTC Operating Tips.......................................................................... 30
Appendices ............................................................................ 31
Appendix A - Specifications ............................................................. 31
Appendix B - Pinout ........................................................................ 32
Appendix C - Dimensions ................................................................ 34
Appendix D - Wiring Details ............................................................. 37
Appendix E - LTC CAN Messages ................................................... 39
Appendix F - Lambda to Air Fuel Ratio Table .................................. 42
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.
Copyright 2016 - MoTeC Pty Ltd
V1.7 24 February 2017
LTC User Manual
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Summary of Contents for Motec LTC
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Page 1: Table Of Contents
Appendix B – Pinout ................ 32 Appendix C – Dimensions ..............34 Appendix D – Wiring Details ............. 37 Appendix E – LTC CAN Messages ........... 39 Appendix F – Lambda to Air Fuel Ratio Table ........42 Copyright 2016 – MoTeC Pty Ltd The information in this document is subject to change without notice. -
Page 2: 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: •... - Page 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)
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Page 4: Installation
Introduction 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. - Page 5 MoTeC Installation 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.
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Page 6: Ltc Manager Software Installation
The software must be installed on Windows XP SP3 or later. The same software package is used for the LTC, LTCD, LTC-NTK and LTCD-NTK. Note: The LTC Manager software is not required if using a single LTC or LTCD unit preconfigured by MoTeC. -
Page 7: Can Bus Interface
LTC Manager is run. CAN Bitrate Settings All devices on a CAN bus must be configured to the same CAN bitrate. The CAN bitrate setting in LTC Manager (Tools > Options) must be set to match the bitrate of the connected CAN bus. - Page 8 CAN Bitrate Conversion Tool All LTC devices are initially configured with a 1Mbps CAN bitrate. For applications that require a different CAN bitrate, each LTC on the bus must be individually converted to operate at the new bitrate. Supported bitrates are 1Mbps (default), 500Kbps, 250Kbps and 125Kbps.
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Page 9: Configuration
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. Operation for information on configuring a MoTeC Data Logger or ECU to... - Page 10 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). • Click OK. The configuration updates will be sent to the LTC, this may take several seconds...
- Page 11 Installation LTC-NTK 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.
- Page 12 Select a Standard Output Table, generally Lambda to three decimal places 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-NTK Output Table The standard output table for the LTC-NTK is for Lambda to three decimal places.
- Page 13 Installation Richer than Standard Lambda Readings The Lambda reading range of the LTC-NTK can be extended by adding extra sites to the Standard Table. If the Standard Table is selected (Lambda 3dp), the user can select Custom Table, then Edit, which will expose the current Lambda Calibration Table.
- Page 14 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.
- Page 15 CAN Collect Masters and Slaves. The Master device is always shown as LTC unit 1 (Master (1)), and the slave devices are shown as LTC units 2 to 16 according to the configured CAN address as shown in this example.
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Page 16: Calibration
The Bosch LSU 4.9 Lambda sensors are fitted from 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... - Page 17 - To apply the new calibration click OK. • Click OK to save the calibration method and settings to the LTC. Tip: Spare sensors can be air calibrated before an event and tagged with the 14 digit calibration number. This number can be used in the entered Free Air...
- Page 18 When the calibration is complete the new calibration value is displayed. This value should be recorded against the serial number of the sensor to enter this calibration when the sensor is used with another LTC unit. To apply the new calibration click OK.
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Page 19: Firmware
The Config Status column in the main LTC Manager window will indicate if the firmware version requires updating. Update the Firmware • Select the LTC row in the main LTC Manager window • Click Update Firmware. A progress window will be displayed while the firmware is sent to the LTC. -
Page 20: Operation
LTCs. Sensor Type The Sensor Type column shows the sensor type. For an LTC 4.9 the sensor type will always be LSU4.9 and for an LTC-NTK the sensor type will be the configured type. Serial Num The Serial Num column shows the unique serial numbers of all connected LTCs. - Page 21 Sensor State The Sensor State column shows the operating state of all connected LTCs. Sensor State Description Starting LTC hardware is performing a self calibration Heating The Lambda sensor is outside the temperature range required for measurement Running Lambda measurement is active...
- Page 22 LTC Temp The LTC Temp column shows live internal temperature readings of all connected LTCs. Note: The temperature column shows the temperature of the LTC unit, not the sensor temperature. CAN Address The CAN Address column shows the configured CAN addresses (in hex) of all connected LTCs.
- Page 23 MoTeC Operation The number in the collect column (e.g. (3)) refers to the LTC number (1 to 16) in the messages transmitted by a Collect Master LTC. For more information about CAN Collect, see CAN Collect Functionality Config Status The Config Status column shows any issues relating to the configuration of the connected LTCs.
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Page 24: Motec Data Loggers
Received Lambda readings and diagnostics can be displayed and logged. Refer to the Dash Manager software for more information. There are two methods for receiving LTC CAN messages with a logger device: Using One CAN Template Per LTC Select the matching template (e.g. LTC #1 (CAN ID 460)) to receive all available readings and diagnostics from an LTC. -
Page 25: Motec M1 Ecus
LTC configuration is found in M1 Tune under Exhaust > Lambda where LTCs can be enabled for Banks, Collectors and individual cylinders. LTC devices are configured in M1 Tune by setting the CAN bus, Index and LTC Type. The Index specifies the CAN ID (e.g.. 0x460) used to receive LTC CAN messages. -
Page 26: Motec 'Hundred Series' Ecus
Manager for the CAN Collect Master LTC. The recommended address is 1120. * Important: CAN addresses in ECU Manager are in decimal, while the CAN addresses in LTC Manager are in hex. e.g. 1120 decimal = 460 hex Configure M84 ECU Communications for LTC •... - Page 27 • Select Adjust > Sensor Setup > Input Setup... to open the Input Pins Setup dialog. • Attach an LTC reading to a channel, using the following parameters Input Source Predefined Calibration PLM 1 to PLM 12 #81 Lambda: PLM over CAN...
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Page 28: Lambda And Air Fuel Ratio
Operation Lambda and Air Fuel Ratio Lambda gives a measure of the Air to Fuel Ratio (AFR) that is independent of the type of fuel being used. Lambda 1.00 Stoichiometric ratio: no excess fuel and no excess air Lambda > 1.00 Lean: excess air Lambda <... - Page 29 MoTeC Operation Lambda Sensor Sensor Warm-up The internal heater in the Lambda sensor is powerful enough to allow accurate measurement when gas temperature is at room temperature. The sensor will take approximately 20 seconds to heat up. The maximum continuous operating temperature of the sensor is 850 °C.
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Page 30: Ltc Operating Tips
Operation LTC Operating Tips If the engine misfires for any reason, including an over-rich mixture, the LTC may falsely read Lean. This is due to excess air being present in the exhaust gasses, caused by incomplete combustion. Other areas that can give misleading readings include at high RPM, closed throttle when the mixture won’t burn completely. -
Page 31: Appendices
MoTeC Appendices Appendices Appendix A – Specifications • Sensor Type Bosch LSU 4.9 Lambda sensor (LTC4.9) • NTK LZA09 Lambda Sensor • Power Supply 11 V - 16 V DC • 110 mA typical current plus the sensor heater current. -
Page 32: Appendix B - Pinout
Appendices Appendix B – Pinout Bosch LSU version (LTC 4.9) LTC Connector A LTCD Connector A and B Bosch LSU 4.9 sensor connector Mating connector: supplied on sensor Pin No Wire Colour Description Yellow Sensor 0 V White Heater -... - Page 33 MoTeC Appendices NTK version (LTC-NTK) LTC-NTK Connector A NTK sensor connector Mating connector: supplied on sensor Pin No Wire Colour Description Blue Heater + Yellow Heater - Orange Black Sensor 0V Grey White Black Sensor 0V Power/CAN Connector DTM 4pin (M) (#68055)
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Page 34: Appendix C - Dimensions
Appendices Appendix C – Dimensions... - Page 35 MoTeC Appendices...
- Page 36 Appendices...
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Page 37: Appendix D - Wiring Details
Wiring size should be suitable for the number of LTCs used. Tip: To wire the LTC to power, connect either to the ignition switch for fast sensor start up or connect to the fuel pump relay to prevent accidental battery... - Page 38 Appendices Optional 100R Terminating These wires must be twisted Resistors at each Connector Minimum one twist per 50mm (2in) end of the CAN Bus 500mm << CAN Bus >> CAN-HI CAN-LO 500mm 500mm Max Device Device Device Short CAN Bus If the CAN bus is less than 2 metre (7 ft) long, a single termination resistor may be used.
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Page 39: Appendix E - Ltc Can Messages
MoTeC Appendices Appendix E – LTC CAN Messages Messages 1 and 2 are transmitted by all LTC units. Messages 5 to 10 are only transmitted from an LTC unit configured as a CAN Collect Master. Message 1 Byte Name Scaling... - Page 40 Appendices Hi:Lo = xxxx μA Ip (Raw pump cell current) Ri (Sensor cell impedence) Hi:Lo = xxxx Ohms (0 for LTC-NTK, not applicable) LTC4.9 only LTC-NTK only Message 3 Byte Name Scaling Compound ID = 2 Firmware Version Letter 0..25 = A..Z Firmware Version Number e.g.
- Page 41 MoTeC Appendices Message 8 Byte Name Scaling Compound ID = 7 Reserved LTC10 Lambda Hi:Lo = x.xxxLa LTC11 Lambda Hi:Lo = x.xxxLa LTC12 Lambda Hi:Lo = x.xxxLa Message 9 Byte Name Scaling Compound ID = 8 Reserved LTC13 Lambda Hi:Lo = x.xxxLa LTC14 Lambda Hi:Lo = x.xxxLa...
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Page 42: Appendix F - Lambda To Air Fuel Ratio Table
Appendices Appendix F – Lambda to Air Fuel Ratio Table Lambda Air Fuel Ratio Petrol Alcohol Diesel 0.70 10.3 10.9 10.2 0.75 11.0 11.6 10.9 0.80 11.8 12.4 11.6 0.85 12.5 13.2 12.3 0.90 13.2 14.0 13.1 0.95 14.0 14.7 13.8 1.00 14.7...
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