Motec LTC, LTCD, LTCD-NTK, LTC-NTK User Manual

MoTeC LTC User Manual

Contents

Introduction .............................................................................. 2

Installation ................................................................................ 4

LTC Install ation ..................................................................................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

Monitori ng LTCs .............................................................................. 20

MoTeC Data Loggers ....................................................................... 24

MoTeC M1 ECUs ............................................................................. 25

MoTeC 'Hundred Ser ies' ECUs ........................................................ 26

Lambda and Air Fuel Rati o............................................................... 28

LTC Operating Tips.......................................................................... 30

Appendices ............................................................................ 31

Appendix A – Specifications ............................................................. 31

Appendix B – Pinout ........................................................................ 32

Appendix C – Dimensions ................................................................ 34

Appendix D – Wiring Det ails ............................................................. 37

Appendix E – LTC CAN Messages ................................................... 39

Appendix F – Lambda t o Air Fuel Ratio Table .................................. 42

Copyright  2016 – 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

cons equenc es of an y in accur aci es or omis s i ons in t his m an u al.

V1.7 24 February 2017

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 avail able to suit either Bosch
LSU4.9 or NTK sensors:

• #61300 – Single Channel Bosch LSU 4.9 Sensor

• #61301 – Dual Channel B osch 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 E CU or Data Logger to simultaneously monitor multiple Lambda
sensors.

Throughout t his manual the LTC, LTCD, LTC-NTK and LTCD-NTK will be
refer r ed to as LTC except where details specific t o a particular model are
discussed.

Features

• Accurate Lambda m easurement even when the exhaust gas temperature
is changing rapidly (heating or cooli ng)

• Ability to perform free air sensor calibration or use the initial sensor factory
calibration. LTC-NTK 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: ACL, SDL, S DL3, ADL, ADL2, ADL3, CDL3 and all

C Series colour Display Loggers (C187 etc .)

MoTeC Introduction 3

Accessories

• #57006 Bosch LSU 4.9 Lambda Sensor

• #57007 NTK Lam bda Sensor

• #61059 MoTeC UTC - USB to CAN, used to comm unicate to the PC

(optional)
Note: LT C is not compati ble with MoTeC's CAN cable (part number

61021)

4 Introduction

Installation

LTC Installation

The LTC can be mounted t o 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: LT C maximum ambient temperature is 100 °C.
Use Connector A to connect the single LTC to the Lambda sensor. Use

connectors A and B t o 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 calibrat ed trim m ing resistor embedded in the sensor connec tor. If the factory
sensor connector is cut off and replaced with another type, t he LTC will not
operate correc tly.

Note: Unlike the Bosch LSU 4.9 the NTK sensors standard connect or can be

removed and r eplac ed by a non-standard connector without affecting the
performance of the sensor or the LTC-NTK. However, the initial factory
calibration method will not work as the calibration resistor is built into the
origi nal c onnec tor. In this case Free Air cali br ation is required. It is
recommended that no wiring modification is made to the NTK sensor or LTC­NTK unless completely necessary.

The Lambda sensor should be fitted to the exhaust system with the sensor tip
protrudi ng into the exhaust gas flow. The following c onsi der ations should be
taken into acc ount when fitting the sensor:

• Place the sensor on an angle between 10 and 90 degrees to the vertical
with the tip of t he sensor pointing down to prevent condensati on build up
between the sensor case and the sensor cer amic.

• Do not place the sensor in a vertical position; excess heat soak will
prevent pr oper oper ation.

• Place the sensor at least 1 metre from the exhaust ports to av oid
excessive heat (recommended).

• Place the sensor at l east 1 metre from the open end of the exhaust system
to avoid incor r ect r eadings due to outside oxygen (recommended)

MoTeC Installation 5

o Where necessary for short er ex haust systems the sensor could be

placed closer to the engine.

• Place the sensor away fr om the fl am e front comi ng out of the cylinder
head and away fr om areas where one cylinder may have more effect than
another.

• If possible, do not place the sensor near exhaust slip joints; some designs
allow air to enter resulting in inc orrect readings.
If the sensor has to be plac ed near a sli p joint, reverse the slip joint s to
reduce the i nfluence of introduced ai r.

Exhaust slip joint design

Exhaust flow

Introduced air No air introduced

Incorrect sensor

placement

Correct sensor plac ement

6 Introduction

LTC Manager Software Installation

The LTC Manager software is required for confi gur ation and calibration of LTC
units. The software must be install ed on Windows XP SP3 or later. The same
software package i s used f or the LTC, LTCD, LTC-NTK and LTCD-NTK.

Note: The LTC Manager software is not required if usi ng a singl e LTC or
LTCD unit preconfigured by MoTeC.

Install LTC Manager Software

• Go to the MoTeC website at www.motec.com and navigate to downloads
> software > latest releases > LTC Manager

• Save the LTC Manager installation file in your pref er r ed loc ation (for
example desktop)

• Double cli c k the saved file to run the installer

• Follow the installation instruc tions on the Install Wizard

• To start the program aft er installation,

double click the LTC Manager icon on the desktop

OR

Click Start > All Pr ogr am s > MoTeC > LTC > LTC Manager

Updating Software

Software updates are available free of char ge, giving access to the latest
features for the life of the device. Download the latest software versions from
the website and f ollow the software installation instructions to update to the
new version.

To update the associated firmware in the device see

Firmware.

MoTeC Installation 7

CAN Bus Interface

Gateway Devices

LTC Manager comm unic ates with the LTC devices on the CAN bus via a
MoTeC gateway devi c e.

Supported gateway dev ices include:

• MoTeC UTC (USB To CAN) connected to the PC via USB.

• MoTeC M1 ECU (all models) connected to the PC via Ethernet.

• MoTeC Display Loggers (all C Series Display Loggers, e.g. C185, plus

ACL, ADL3, SDL3, CDL3) connected to the PC via Ethernet.

The gateway devic e m ust be sel ec ted in LTC Manager as shown below. For
gateway devi c es that have multiple CAN interf ac es (e.g. Display Loggers), the
appropriate CAN bus must also be select ed.

The selected gateway and CAN bus are saved and will be used by default the
next time LTC Manager is run.

CAN Bitrate Settings

All devices on a CAN bus must be confi gur ed to the same CAN bitrate.
The CAN bitrate setting in LTC Manager (Tools > Options) must be set t o

match the bitrate of the connected CAN bus.

100R

100R

LTC

M1

ECU

Display

Logger

LTC

LTC LTC

CAN-HI

CAN-LO

Ethernet

UTC

USB

PC

PC

PC

Ethernet

8 Introduction
CAN Bitrate Conversion Tool

All LTC dev ic es are initially confi gur ed with a 1Mbps CAN bitrate.
For applic ations that require a different CAN bitrate, each LTC on the bus must

be individually convert ed to operate at the new bitrate.
Supported bi trates are 1Mbps (default) , 500Kbps, 250K bps and 125Kbps.
The bitrat e c onv er si on tool (Tools > Options) allows an LTC t o be converted to

any of the four supported bitrates (1Mbps, 500Kbps, 250Kbps and 125Kbps).
Note: During t he bitrate conversion, all devices must be removed from the

CAN bus except for one LTC device and the MoTeC gateway device.
This is required as the LTC and gateway device change bitrate during the

conversi on pr oc ess. If any other CAN devic es are present then CAN bus
would be in error, preventing all devices fr om communic ating.

MoTeC Installation 9

Configuration

Introduction

LTC Manager is used to individually configure and cali brate 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 configur ation and calibrati on oper ations are performed di r ectly on an
LTC and configur ations are not stored on disk.

Note: LT C units come pre-configured to suit a single LTC or LTCD unit
installation using the initial factory sensor calibration.

The default CA N addr ess f or the LT C is hex 460.
The default CA N addr esses for LTCD is hex 460 for Lambda sensor 1 and hex
461 for Lambda sensor 2.

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.

• Select the c or r ect gateway and CAN bus (see

CAN Bus Interf ac e)

The main LTC Manager window displays the live configurati on and status of all
LTC units present on the connec ted CAN bus.

Setup

CAN Address

The CAN setup determi nes which CAN addr es s (speci fied 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 confi gur ed with a unique CAN address.
See

Operation for information on confi guri ng a M oTeC Data Logger or ECU to

receive LTC CAN m essages.

10 Introduction
LTC 4.9 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 Reco mmend ed Address c hec k box and enter one of the

addresses in the dr op down box to communicate wit h MoTeC product s
such as Data Loggers or 'Hundred Series' ECUs.
The recommended addr ess range for LTC messages is hex 460 to hex
47F.

OR

Select the Custo m Address chec k box and enter an address (in hex) for
interfacing with third party equi pm ent.

OR

Select Disabled to prevent an LTC from transmi tti ng CAN messages.
While disabled an LTC will not heat the sensor or perf orm Lambda
measurements.

Note: Lambda sensors should not be left in t he ex haust system of a
running engi ne if they are not being controll ed. A disabled sensor in a
running engi ne c an be dam aged.

• In the Name area the def ault name will appear. The default nam e matc hes

the selected CA N A ddr ess (LTC1 et c .). 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

MoTeC Installation 11
LTC-NTK Unit Setup

• To open the LTC Setup window, double click the row in the t able

containing the LTC or click the row and click Setup.

• Select the Recommended Address check box and enter one of the

addresses in the dr op down box to communicate with MoTeC products
such as Data Loggers or 'Hundred Series' ECUs.
The recommended addr ess range for LTC messages is hex 460 to hex
47F.

OR

Select the Custo m Address chec k box and enter an address (in hex) for
interfacing with third party equi pm ent.

OR

Select Disabled to prevent an LTC from transmi tti ng CAN messages.
While disabled an LTC will not heat the sensor or perf orm Lambda
measurements.

Note: Lambda sensors should not be left in t he ex haust system of a
running engi ne if they are not being controll ed. A disabled sensor in a
running engi ne c an be dam aged.

12 Introduction

• In the Name area the def ault name will appear. The default nam e matc hes

the selected CA N A ddr ess (LTC1 et c .). If required, the user can specif y a
custom name ( e.g. Left Bank or Cyli nder 4) .

• Select a Standard Sensor type f r om the dr op down menu

OR
Select a Custom Sensor
Note: Custom sensor setups are for advanced users and it is not

recomm ended for general use.

• Select a Standard Output Tab le, generally Lambda to three decimal
places

OR

Use a Cust om Ta ble for another ty pe of f uel, e. g. Diesel.

• Click OK. The configurati on 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 dec im al places. It is
possible f or the user to m ak e a custom t able to
suit the Air/Fuel ratio of any fuel.

When the Edit button is clicked under Output
Table a table of Normalized Current appears.
The standard Lam bda v alues appear in the
Output column, these num ber s can be
modified to reflect Air/Fuel ratio of a specific
fuel. See

Appendix F for details of common

fuels.

Custom tables can be sav ed usi ng the Save
As button.

MoTeC Installation 13
Richer than Standard Lambda Readings

The Lambda reading r ange of t he LTC-NTK c an be ex tended by adding extra
sites to the Standard Table. If the Standar d Table is selected (Lambda 3dp),
the user can select Custom Table, then Edit, which will expose the curr ent
Lambda Calibration Table.

At the lower end of the table, users can enter their own values for richer
mixtures. The table will be reordered when Enter is pressed.

The Save As option is recommended in order to save the modified t able with a
diff er ent name.

NOTE: MoTeC only recommends rich Lambda values down to 0.63La for the
NTK sensor. W hile it is possible to enter current values and their subsequent
Lambda values to t he table, this must be based on the user’s own t esting.

The following table is a suggested starting point for richer Lambda r eadings.

14 Introduction

This can be added to the MoTeC-prov ided calibration table in the LTC-NTK
setup.

Testing should be done to ensure the accuracy of any v alues enter ed

into the table bey ond the MoTeC-provided values.

CAN Colle ct Fu nctionality

CAN Collect func tionality allows one LTC (the CA N Collect M aster ) to collect
CAN data from up t o 15 other slave LTCs, and retransmit these Lambda
readings on a single CA N addr ess (see

Appendix E – LTC CAN Messages).

Note: A CAN Coll ect M aster dev ic e will c ontinue to transmit the standard LTC
messages in addi tion to the special coll ect m aster messages.

CAN Collect functionality requires onl y a single CAN address to be configured
on a MoTeC Data Logger to receive up to 16 Lambda readings.

See

Operation for information on confi guri ng M oTeC 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 dev ice is the address on which the
coll ected Lam bda v alues wil l be retransmitted. This address must end in a
zero (i.e. hex 460, 470 etc). The recommended addr ess 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 Sl av e devi c e must be confi gur ed with one of the
15 addresses following the master address. For ex am ple, if the collect
master address is hex 460, the slave devices must use CAN addresses in
the range hex 461 to 46F.

Normalized Ip (mA) Output ( Lambda)

-8.000 0.620

-9.000 0.605

-10.000 0.590

-11.000 0.575

-12.000 0.560

-13.000 0.545

MoTeC Installation 15

The Collect column on the main LTC
Manager Window shows the configuration
of CAN Collect Masters and Sl aves. The
Master devic e is al ways shown as LTC
unit 1 (Master (1) ) , and t he sl av e dev ic es
are shown as LTC unit s 2 to 16 according
to the confi gur ed CA N address as shown
in this examp le.

16 Introduction

Calibration

Warning: The Bosch LSU 4.9 Lambda sensors are fitt ed from factory with a

cali br ated t rimming resistor embedded in t he sensor connect or , if the factory
sensor connector is cut off and replaced with another type the LTC will not
operate correc tly.

Note: Unlike the Bosch LSU 4.9 the NTK sensors standard connector can be

removed and r eplac ed by a non-standard connector without affecting the
performance of the sensor or the LTC-NTK. However, the initial factory
cali br ation method will not work as the calibration resistor i s buil t into the
origi nal c onnec tor. In this case Free Air calibration is required. It is
recomm ended that no wiri ng m odification is made to the NTK sensor or LTC­NTK unless completely necessary.

Calibration Methods

Initial fact ory calibration

The default c alibration method uses the known characteristics of a new
sensor that has been f ac tory trimmed.

Free Air Calib rat io n

As a sensor ages, the sensor calibration may change. To maintain accurate
readings, the LTC allows for re-calibration using the k nown oxygen
concentrat ion of free air. The free air calibration procedure takes several
readings with the sen sor in free air to calculat e new calibrat ion values.

To perform an accur ate free air calibration, the lambda sensor must be
removed from the exhaust and placed in an open air environment.

It is recommended to perform the cali br ation outside of a workshop or dyno
room as there may be large am ounts of hydrocarbons in the atm osphere.
Contaminated air will result in an incor r ect c alibr ation or a failure to
calibrate. Wind shoul d also be avoided as it can affect the free air
calibration.

Reference Gas Calibration (LTC-NTK only)

Referenc e gas samples for different lam bda c an be purchased (not
avail able from M oTeC) for use as a means of calibrating the LTC-NTK.
This method is provided for but is unlikely to be implemented by most
users.

Calibrate the LTC 4.9 Unit

• Click Calibrate… to open the Gain Calibration window

MoTeC Installation 17

• Select one of the t hr ee options available:

o Initial F actory S ensor Calibration. Thi s is the default value and

can be used in most cases.

o Entered Free Air Calibration. A calibration value from a previous

Free Air Calibration can be entered.

o Free Air Calib rat io n. A calibration is performed with the sensor in

free air. To perform the free air calibration:

- Click Perform Air Calibration
Note: The calibration process may take several minutes during

which the cali br ation progress window is display ed.

- The new calibr ation 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 LT C unit.

- To apply the new calibr ation 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 t he

14 digit calibr ation number. This number c an be used in the entered Free Air
Calibration option for quick replacem ent of a sensor during the event.

18 Introduction
Calibrate the LTC-NTK Unit

• Click Calibrate… to open the Gain Calibr ation window

• Select one of the four options available:

o Initial F actory S ensor Calibration. Thi s is the default value and

can be used in most cases.

o Entered Gain Factor. A gain factor fr om a previous Free Air

Calibr ation or Reference Gas Calibration can be entered.

o Reference Gas Calibration. A Reference Gas Cal ibration is not

recomm ended for normal use as it required cali br ated testi ng gas.

o Free Air Calib rat io n. A calibration is perform ed with the sensor in

free air. To perform the free air calibration:

- Click Star t F r ee Ai r Cali br ation
Note: The calibration process may take several minutes during

which the cali br ation progress window is display ed.

- When the calibration is complete the new calibration value is
displayed. This value should be recorded against the serial
number of the sensor to ent er this calibration when the sensor
is used with another LTC unit.

- To apply the new calibr ation click OK.

MoTeC Installation 19

• 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 t he

4 digit calibr ation number. This number c an be used in the Entered Gain
Factor calibration option f or qui c k replacement of a sensor during the event.

Firmware

Each version of the LT C Manager software includes a matching firmware
version that m ust be sent to the LTC in order to operate correctly.

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 windo w will be displayed while the firmware is sent to the LTC.

20 Operation

Operation

Monitoring LTCs

The main LTC Manager window shows live readings, diagnostics and LTC
state inf ormation for all connected LTCs.

Sensor Type

The Sensor Type colum n shows the sensor ty pe. For an LTC 4.9 the sensor
type will always be LSU4.9 and for an LTC-NTK the sensor type will be the
configur ed type.

Serial Num

The Serial Num colum n shows the uni que serial numbers of all connec ted
LTCs. An LTCD will be displ ay ed as two LTCs with the same serial num ber
but the designat or s A and B to ident ify the two sensors.

Name

The Name column shows the assigned names of all connected LTCs. The
displayed name is configured in the Setup dialog.

Readings

The Readings col um n shows live readings of all connected LTCs. The
readings can be configured to display as either Lam bda or AF R (Air Fuel
Ratio) for a num ber of different fuels.

Note: t he displ ay units do not affect the units of the tr ansmitted readings i n
CAN messages.

MoTeC Operation 21

Configure display units

• Select Tools > Options.

• Choose a predefi ned stoichiometric AFR for one of various fuels

OR

Define a c ustom AFR by enteri ng a stoichiometric point bet ween 1.0
and 100.0.

Display live readings in larger format

• Select View > Readings or press F5.
This lar ger format display provides a usef ul m eans of monitori ng several
sensor val ues whil e tuning.

Sensor State

The Sensor Stat e c olum n shows the operat ing state of all connected LTCs.

Sensor State Description

Starting LTC hardware is performing a self calibr ation
Heating

The Lambda sensor is outside the tem per ature range

required for measurement
Running Lambda measurement is active
Cooling

A heater short cir c uit or a failure to reach operating

temperatur e has occur r ed. The sensor is allowed to

cool befor e another attempt at heating.

22 Operation

Diagnostics

The Diagnostics column shows fault s and diagnosti c information for all
connected LTCs.

Diagnostic Description

Heater short
circuit (GND)

A short circuit to ground has been detec ted in the

heater wiri ng
Heater short

circuit (Batt+)

A short circuit to bat tery+ has been detected in the

heater wiri ng
Heater open

circuit

An open circ uit has been detected in the heater wiring

Failed t o achi ev e
heat

The measured sensor temperature is not responding

to sensor heating. This fault may indicat e a fault with

the sensor wiring.
Sensor short

circuit

A short circuit has been detec ted in the sensor wiring

Corrupt Firmware

The LTC firmware is corr upt. Upgrade the firmware to

restore operation.
Incompatible

Firmware

The LTC firmware is i nc om patible with LTC Manager.

Upgrade the firmware to restore operati on.

LTC Temp

The LTC Temp column shows live internal temperat ur e readi ngs of all
connected LTCs.

Note: The tem per ature column shows the temperat ur e of t he LTC unit , not the
sensor temper ature.

CAN Address

The CAN Address column shows the conf igured CAN addresses (in hex) of all
connected LTCs.

To configure the CAN addresses see

Setup.

Collect

The Collect column shows the configured CAN Coll ect functionality of all
connected LTCs. To configure the CAN Collect functionality see

Setup.

A configured CAN Collect Master device is always shown as Master ( 1) .
Any LTC unit configur ed with a CAN address within the 15 CAN addresses

following a Collect Master address will be shown as Slave (x).

MoTeC Operation 23

The number in the c ollec t column (e.g. (3)) refers to the LTC number ( 1 to 16)
in the messages transmitted by a Collect Master LTC.

For more inf ormati on about CAN Collect, see

CAN Collect Functionality

Config Status

The Confi g Status col um n shows any issues rel ating to the confi gur ation of the
connected LTCs.

Config Status Description

OK Config is OK
Disabled The LTC has been disabled under the Setup options.

A disabled LT C will not measure or transmit readings.

Incompatible
Config

The configuration in the LTC is not compatible wit h
the firmware i n the LT C. A new configuration can be
sent to the LTC by changing the Setup or Calibration.

Corrupt Config

The configuration in the LTC is corrupt. A new
configur ation can be sent to the LTC by changing the
Setup or Cali br ation.

CAN Address
Conflict

Multiple LT C units have been configured with t he
same CAN address. Each LTC m ust be c onfigured
with a unique address.

Device Type

The Devic e Ty pe colum n shows the model of the connected LTC (LTC4.9 or
LTC-NTK).

Firmware Version

The Firmware Versi on c olumn shows the version of the firmware in eac h of t he
connected LTCs.

24 Operation

MoTeC Data Loggers

MoTeC Data Loggers incl ude CA N c ommunication templates to rec eiv e LTC
messages fr om up to 16 LTCs.

Received Lambda readings and diagnostic s can be displayed and logged.
Refer to the Dash Manager sof tware for more inform ation.

There are two methods for receiving LTC CAN messages with a logger device:
o Using One CAN Template Per LT C

Select the m atching template (e.g. LTC #1 (CAN ID 460)) to rec eiv e all
avail able r eadings and diagnostics fr om an LTC. T he select ed template
must match the LTC CA N address specif ied in LTC Manager.

Receiving full LTC messages provides the most information about an LTC
and requires one CAN section per LTC in the communications setup.

o Using LTC CAN Collect T empl at e

Select the LTC Collect 16 Channel CAN templat e to receive Lambda
readings f r om up to 16 LTCs. T he LTCs must be configured in LTC
Manager f or CAN Collect functionalit y using addres s hex 460 for the CAN
Collect M aster .

Receiving CAN collect messages provides only Lam bda r eadings from
each LTC but only r equir es one CAN section in the communications setup
for up to 16 Lambda readi ngs.

For more information see

CAN Collect Func tionality.

Refer to Dash Manager help for details on loadi ng CAN templ ates.

MoTeC Operation 25

MoTeC M1 ECUs

MoTeC M1 series ECU pack ages can support up to 32 LTCs.
LTC configuration is found in M1 Tune under Exhaust > Lam bda where LTCs
can be enabled for Banks, Collectors and individual cylinders.

LTC devic es 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. The Index for each confi gur ed LTC must be unique and must
match the configured LTC device.

The LTC Type must match the connected LTC Device.
Type LTC refers to a LTC4. 9 dev ic e
Type LTCN refers to a LTC-NT K device

See the package help in M1 Tune for details on lambda setup.

26 Operation

MoTeC 'Hundred Series' ECUs

MoTeC ‘Hundred Series’ ECUs (M400, M600, M800, M880) can be configured
to receive Lambda m easurements from up to 12 LTCs using the existing PLM
CAN templates i n the ECU Manager software. The M84 ECU can rec eiv e two
channels of Lam bda with CAN addresses 460 and 461.

Received Lambda readings can be used in engine control and logged.
Refer to the ECU Manager sof tware for more information.

Note: The ECU only stor es the Lambda r eadings from the LTC messages;
LTC diagnostic information is not stored.

Configure Hundred Series ECU Communications for LTC

• Select Adjust > General Setup > Communicati on > CAN Set up

• For singl e LTC configuration:

o Select a spare CAN data sl ot in the range CAN 1 to CAN 6
o Enter 1 - PLM Rec eiv e for CA N Data

Enter the LTC CAN Address in decimal*

. The address must match

the CAN address specified in LTC Manager.

• For CAN Collect configuration:

The LTCs must be configur ed in LTC Manager for CAN Collect
functionality using address hex 460 f or the CAN Collec t Master .

o Enter 1 - PLM Rec eiv e for CA N 6 Data
o Enter the LTC CAN address in decimal* for CAN 6 address.

The address must match the CAN address specified in LTC
Manager f or the CA N 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

Configur e M84 EC U Com m unications for LTC

• Select Adjust > General Setup > Communication > CAN Setup

• For singl e or dual LTC c onfiguration:

o Enter a CAN Address of 1120 (460 Hex ) into the PLM CAN

Address

Assign Lambda measurements to a Hundred Series channel

Lambda measurements from the LTCs must be assigned to an ECU c hannel
before they can be used for engine control or logging.

MoTeC Operation 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

Example 1: LT C1 readi ng assigned t o c hannel Lambda 1

Example 2: LT C1 to LTC4 readings assigned to Lambda Cyl channels

Assign Lambda measurements to a M84 channel

For an M84 the Lambda Input Sour c e is fixed so only the Calibration needs to
be chosen – Predefined “#81 Lambda: PLM over CAN”

28 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: exc ess ai r
Lambda < 1.00 Rich: excess fuel

Stoichiometric Air Fuel Ratio for various fuels

Lambda Air Fuel Ratio
Petrol Alcohol LPG Diesel

1.0 14.7 6.4 15.5 14.5

Calculations with Lambda

Fuel

Stoichiometric
AFR

Measured
value

Calculated value

Petrol 14.7 AFR = 14 Lambda = 14/14.7 = 0.95
Diesel 14.5 Lambda = 1.1 AFR = 1.1 x 14.5 = 16

See Appendix F – Lambda to Air Fuel Rati o Table for a quick reference table.

Engine Tuning wi t h Lambda

When tuni ng the engine, the target Lambda (or AFR) is dependent on the
tuning objective. The following table can be used as a guideline.

Tuning objective Lambda

Maximum power 0.84 to 0.90
Economy 1.05
Emissions 1.00

Normally the engine is tuned for maximum power at full load and for emissions
or economy at light loads.

The exact requi r em ents for a specific engine and fuel can only be found by
experimentation. On turbo engi nes ext r a fuel may be desirable to reduce
exhaust tem per atures and help avoid knock. If the vehicle is fitted with a
catalytic c onv er ter, extra fuel may be requir ed to ensure the c atalyst does not
overheat when not operating at Lambda 1.00

MoTeC Operation 29

Lambda Sensor

Sensor Warm-up

The internal heater in the Lambda sensor is powerf ul enough to allow accurate
measurem ent when gas temperature is at room temperat ur e. The sensor will
take approximately 20 seconds to heat up.

The maximum continuous

operati ng temperature of the sensor is 850 °C.

Sensors should not be used at higher temperatures for a prolonged period,
although t he sensor can be heated to 930 °C for a maximum of 10 minutes.

This may however reduce t he accuracy.

Sensor Lifetime

The sensor lif etime is dependent on the type of fuel being used and the
volume of gas fl ow ov er the sensor.

Sensor lifetime will be reduced by contami nants such as silicon, lead, oil, etc.
Thermal cycli ng and ex posure t o exhaust fumes without any heating control
activ e will also age the sensor more rapidly.

Manifold seal ants can contaminate sensors. Use seal ants that are sensor­friendly to prevent reduced sensor lifetime.

When using leaded fuel, sensor element contamination will reduce t he sensor
lifetime substantially. Typic ally sensor lifetime for high performance engines is
at least 500 hours i n unleaded fuel and 50 hours in leaded f uel. Longer
lifetimes can be expected for less demanding applications. These fi gur es are a
conserv ative estimate as the sensors are designed t o be ac c ur ate for 50,000
km of operati on in a road car.

Incorrect placement in the exhaust can over heat the sensor and significantly
reduce the sensor l ife. For the Bosch LSU 4.9 the sensor impedanc e ( Ri) is an
indic ation of sensor temperature. I n normal operation Ri should be
approximately 300 ohms. If Ri is less than 250 ohms then the sensor is bei ng
overheated. Ri is included in the transmitted CAN messages. Due to the
diff er ent control system for the NTK sensor the Ri param eter is not applicable.

At the end of its life the sensor becomes slow to respond and does not read
rich properl y . Regular performanc e of the Free Air Calibr ation (see

Calibration)

will mai ntain the accuracy of the sensor over its lifetime.

30 Operation

LTC Operating Tips

If the engine misfires for any reason, i ncl uding 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
throttl e when the mix ture won’t burn completely. Following overrun fuel cut
when the sensor has becom e satur ated with oxy gen it can take up to several
seconds to resume acc ur ate readings. Engine misfires include hitting the rev­limiter , be it a fuel or ignition cut or a combination of both, and can give a
similar r esul t wit h time being required to pur ge the sensor of ex c ess oxy gen or
fuel.

Engines with hi gh ov erl ap c am shafts running at low speed may pump air
through the engine resulting in a false l ean r eading, Th erefore the LTC may
need to read leaner than would ot her wise be expected.

MoTeC Appendices 31

Appendices

Appendix A – Specifications

Sensor Type

• Bosch LSU 4.9 Lam bda sensor (LTC4.9)

• NTK LZA09 Lambda Sensor

Power Supply

• 11 V - 16 V DC

• 110 mA typical current plus the sensor heater

current.

• Heater current is ty pic ally 0.5 A - 1 A (up to 2 A

on startup)

Communications

• 1 Mbit/sec CAN

Physical

• Dimensions 38 x 26 x 14 mm excluding wiring
looms and connector s

• Weight 62 grams

• Mounting holes spacing 32 mm (Ø3.2 mm)

Max Temperatures

• Max ambient t em per ature at device 100 °C

• Max internal device temperature 125 °C

32 Appendices

Appendix B – Pinout

Bosch LSU version (LTC 4.9)

LTC Connector A
LTCD Connecto r A and B

Bosch LSU 4.9 sensor connect or
Mating connect or : supplied on sensor

Pin No Wire Colour Description

1 Red Ip
2 Yellow Sensor 0 V
3 White Heater ­4 Grey Heater +
5 Green Ipr
6 Black Vs

Power/CAN Connector

DTM 4pin (M) (#68055)
Mating connect or : DTM 4pin (F) (#68054)

Pin No Wire Colour Description

1 Black Battery ­2 Green CAN Lo
3 White CAN Hi
4 Red Battery +

MoTeC Appendices 33

NTK version (LTC-NTK)

LTC-NTK Connector A

NTK sensor connector
Mating connect or : supplied on sensor

Pin No Wire Colour Description

1 Blue Heater +
2 Yellow Heater -
3 Orange Rc
4 Black Sensor 0V
5 N/C
6 Grey VS
7 White IP
8 Black Sensor 0V

Power/CAN Connector

DTM 4pin (M) (#68055)
Mating connect or : DTM 4pin (F) (#68054)

Pin No Wire Colour Description

1 Black Battery ­2 Green CAN Lo
3 White CAN Hi
4 Red Battery +

34 Appendices

Appendix C – Dimensions

MoTeC Appendices 35

36 Appendices

MoTeC Appendices 37

Appendix D – Wiring Details

Power Connections

Care must be taken f or power and ground wir ing for the LTC. Each sensor
can draw over 3 Amps when cold if multiple channels of Lambda are used thi s
current draw will increase dramatically. Wiring size should be suitable for the
number of LTCs used.

Tip: To wire the LTC to power, connect either t o the igniti on switc h f or fast
sensor start up or connect to the fuel pump relay to prev ent acci dental battery
drainage

CAN Connections

Refer to the example below for details on wiring t he LTC CAN bus.
This examples show multiple options (USB and E thernet) for the PC interfac e.
See section

CAN Bus Interface for details on PC interfacing.

General CAN Bus Wiring Requirements

The CAN bus should consist of a twisted pair trunk wit h 100R termi nating
resistors at each end. The preferred cable for the trunk is 100R data cable.
The maximum length of the bus is 16 metres (50 ft)

CAN devices (such as MoTeC Data Loggers, ECUs etc) may be connected to
the trunk with up to 500 mm (20 in) of twisted pair wires.

An optional CAN connector for the UTC may al so be connected t o the trunk
with up to 500 mm (20 in) of twisted wire and should be wit hin 500 mm of one
end of the trunk.

100R

100R

LTC

M1

ECU

Display
Logger

LTC

LTC LTC

CAN-HI

CAN-LO

Ethernet

UTC

(optional)

USB

PC

PC

PC

Ethernet

38 Appendices

CAN-LO

CAN-HI

100R

100R

CAN

Device

500mm
Max

Optional

UTC

Connector

500mm

Max

<< CAN Bus >>

500mm Max

100R Terminating
Resistors at each
end of the CAN Bus

CAN

Device

CAN

Device

5

4

These wires must be twisted

Minimum one twist per 50mm (2i n)

Short CAN Bus

If the CAN bus is less than 2 metre (7 ft) long, a single termi nation resistor
may be used. The resistor shoul d be placed at the opposite end of t he
CAN bus to the CAN connector.

MoTeC Appendices 39

Appendix E – LTC CAN Messages

Messages 1 and 2 are transmi tted by all LTC units.
Messages 5 to 10 are onl y tr ansmit ted from an LTC unit configured as a CAN
Collect M aster .

Message 1

Byte Name Scaling

0

Compound ID = 0

N/A

1:2

Lambda

Hi:Lo = x.xxxLa

3:4

Ipn (Normalised pump cell
current)

Hi:Lo = xxxx μA

5

LTC Internal Temperature

xxx °C

6 Fault bits

Heater short to Gnd1
Heater short to V B att1
Heater open ci r c uit
Heater failed to heat

1

Sensor wire short

1

Internal fault

1

Sensor Control fault2

Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5

Bit 6

7 Heater duty cycle xxx%

1

LTC4.9 onl y 2LTC-NT K only

Message 2

Byte Name Scaling

0

Compound ID = 1

N/A

1 Sensor State

START

DIAGNOSTICS1
PRE CAL

1

CALIBRATION
POST CAL

1

PAUSED
HEATING
RUNNING
COOLING

1

PUMP START

2

PUMP OFF2

0

1
2
3
4
5
6
7
8
9

10

2:3

Battery Voltage

Hi:Lo = x.xxV

40 Appendices

4:5

Ip (Raw pump cell cur r ent)

Hi:Lo = xxxx μA

6:7

Ri (Sensor cell impedence)
(0 for LTC-NTK, not applic able)

Hi:Lo = xxxx Ohms

1

LTC4.9 onl y 2LTC-NT K only

Message 3

Byte Name Scaling

0

Compound ID = 2

N/A

1

Firm ware Versi on Lett er

0..25 = A..Z

2:3

Firm ware Versi on Num ber

e.g. 104 = v1.04

4:5

Serial Number

Message 5

Byte Name Scaling

0

Compound ID = 4

N/A

1

Reserved

N/A

2:3

LTC1 (Master LT C) Lambda

Hi:Lo = x.xxxLa

4:5

LTC2 Lambda

Hi:Lo = x.xxxLa

6:7

LTC3 Lambda

Hi:Lo = x.xxxLa

Message 6

Byte Name Scaling

0

Compound ID = 5

N/A

1

Reserved

N/A

2:3

LTC4 Lambda

Hi:Lo = x.xxxLa

4:5

LTC5 Lambda

Hi:Lo = x.xxxLa

6:7

LTC6 Lambda

Hi:Lo = x.xxxLa

Message 7

Byte Name Scaling

0

Compound ID = 6

N/A

1

Reserved

N/A

2:3

LTC7 Lambda

Hi:Lo = x.xxxLa

4:5

LTC8 Lambda

Hi:Lo = x.xxxLa

6:7

LTC9 Lambda

Hi:Lo = x.xxxLa

MoTeC Appendices 41
Message 8

Byte Name Scaling

0

Compound ID = 7

N/A

1

Reserved

N/A

2:3

LTC10 Lambda

Hi:Lo = x.xxxLa

4:5

LTC11 Lambda

Hi:Lo = x.xxxLa

6:7

LTC12 Lambda

Hi:Lo = x.xxxLa

Message 9

Byte Name Scaling

0

Compound ID = 8

N/A

1

Reserved

N/A

2:3

LTC13 Lambda

Hi:Lo = x.xxxLa

4:5

LTC14 Lambda

Hi:Lo = x.xxxLa

6:7

LTC15 Lambda

Hi:Lo = x.xxxLa

Message 10

Byte Name Scaling

0

Compound ID = 9

N/A

1

Reserved

N/A

2:3

LTC16 Lambda

Hi:Lo = x.xxxLa

4:5

Reserved

N/A

6:7

Reserved

N/A

42 Appendices

Appendix F – Lambda to Air Fuel Ratio Table

Lambda Air Fuel Ratio

Petrol

Alcohol

LPG

Diesel

0.70

10.3

4.5

10.9

10.2

0.75

11.0

4.8

11.6

10.9

0.80

11.8

5.1

12.4

11.6

0.85

12.5

5.4

13.2

12.3

0.90

13.2

5.8

14.0

13.1

0.95

14.0

6.1

14.7

13.8

1.00

14.7

6.4

15.5

14.5

1.05

15.4

6.7

16.3

15.2

1.10

16.2

7.0

17.1

16.0

1.15

16.9

7.4

17.8

16.7

1.20

17.6

7.7

18.6

17.4

1.25

18.4

8.0

19.4

18.1

1.30

19.1

8.3

20.2

18.9

1.35

19.8

8.6

20.9

19.6

1.40

20.6

9.0

21.7

20.3

1.45

21.3

9.3

22.5

21.0

1.50

22.1

9.6

23.3

21.8

1.55

22.8

9.9

24.0

22.5

1.60

23.5

10.2

24.8

23.2