MoTeC M84 User’s Manual Contents Introduction ........................................................................ 1 Additional Documentation ................................................................................... 1 Overview ............................................................................. 3 Options ............................................................................................................... 3 ECU Inputs & Outputs..............................................
Calibration ........................................................................ 43 Warning Alarms ................................................................................................ 43 Ensure that the engine is “On Site” ................................................................... 43 Site Tables ........................................................................................................ 43 Dyno Calibration .................................................................
MoTeC Introduction Introduction Thank you for purchasing a MoTeC Engine Management System. This manual will help you understand the installation and calibration requirements of your MoTeC Engine Management System. Additional Documentation Additional documentation is available in the form of Drawings and Tech Notes. These can be downloaded from the MoTeC website at www.motec.com.au. They are also available on the MoTeC Resource CD.
2 Introduction MoTeC
MoTeC Overview 3 Overview The MoTeC M84 ECU is a powerful and compact programmable Engine Control Unit (ECU).
4 Overview MoTeC ECU Inputs & Outputs The ECU analyses signals from the sensors, then controls the Fuel Injectors, Ignition System and other auxiliary devices according to the Calibration and Setup Data which is stored in the ECU’s programmable memory. The Inputs and Outputs are shown below. Main Engine Sensors The Main Engine Sensors are required for correct operation of the ECU. The engine RPM is derived from the REF trigger sensor.
MoTeC Overview 5 The Throttle Position, Manifold Pressure, Air Temp and Engine Temp are used as inputs to the various calibration tables. Optional Sensors The Optional Sensors are not required for basic operation of the ECU. The Lambda Inputs may be used for Wideband air fuel ratio measurement or Wideband or Narrowband closed loop Lambda control. The Digital Inputs may be used for wheel speed measurement or to activate functions such as Dual RPM Limit. The other inputs may be used for data logging (e.g.
6 Overview MoTeC CAN may be used to communicate with the MoTeC ADL & SDL Dash Loggers, PLM, LTC and SLM. RS232 Serial Communications Used for receiving GPS data input and transmitting MoTeC Data Set 1 for use with dash displays and loggers.
MoTeC Overview 7 Calibration & Setup Calibration Tables The Calibration Tables determine how the output devices should be controlled for various sensor readings. For example, the fuel calibration table determines the base injector pulse width for all combinations of RPM and Load. Other calibration tables will also affect the fuel injector pulse width such as Air Temperature compensation and Engine Temperature compensation.
8 Overview MoTeC Setup Parameters The Setup Parameters allow the ECU to be configured for almost any engine. The Setup Parameters include Number of Cylinders, Ignition Type, Sensor Types, Injector Current, Auxiliary Output Functions etc. • The Setup Parameters must be correct before attempting to start the engine.
MoTeC Overview Digital Input Functions The following functions are setup in the Digital Input Functions menu • Speed Measurement • Period Measurement • Pulse Measurement • Dual RPM Limit • Air Conditioner Request • Ignition Switch • Brake • Logging Enable • Clutch • Overrun Boost Enhancement • Traction Control Enable • Ground Speed Limiting • Power Steering Auxiliary Output Functions The following functions are setup in the Auxiliary Output Functions menu • Boost Control • Idle Speed Control • Aux Table
10 Overview MoTeC
MoTeC Software 11 MoTeC Software The following software is available for the M84 ECU. ECU Manager: Used for calibration, setup, diagnostics, output testing, upgrading, unloading the logged data and enabling ECU options. i2: Used to analyse the logged data. PC Requirements • IBM PC compatible • 200 MHz Pentium or faster • Operating System: Windows XP. Windows Vista, Windows 7 Connecting a PC to the ECU The PC must be connected to the ECU by a MoTeC UTC or CAN Cable.
12 Software MoTeC The main software required is the ECU Manager software, if Data Analysis is required then the i2 software should also be installed. The software can be downloaded from the MoTeC website at www.motec.com.au . It is available on the MoTeC Resource CD. MoTeC is continually updating the software and newer versions may be downloaded from the website at no charge. To install the software after downloading from the web, double click on the downloaded file and follow the instructions.
MoTeC Software 13 Unloading the Logged Data The logged data can be extracted by connecting the MoTeC UTC or CAN Cable to the ECU and selecting Utilities | Get Logged Data from the ECU Manager menu. Data Logging Analysis The MoTeC i2 software may be used to analyse the logged data. The i2 software is supplied separately to the ECU Manager software. The i2 software makes it easy to analyse mixture readings and other sensor readings by presenting the data in various graphical formats.
14 Software MoTeC
MoTeC Installation 15 Installation Throttle Position or MAP Load Sensing The load point for the fuel and ignition calibration tables may be based on any defined load measuring sensor. The most commonly used are the Throttle Position sensor or the MAP (Manifold Pressure) sensor. Turbo Charged Engines Normally use Manifold Pressure load sensing (connect the MAP sensor to the inlet manifold). A Throttle Position sensor is optional and will be used for acceleration enrichment if fitted.
16 Installation MoTeC sensor is moved or replaced. It is very important to set these parameters with the butterfly in exactly the same place each time. The resistance element inside the sensor may wear due to vibration in high performance engines which can cause erratic readings. It is best to replace the throttle position sensor periodically. Avoid high pressure washing as this may penetrate the seals and damage the sensor. For wiring details refer to the appropriate MoTeC drawing.
MoTeC Installation 17 The plenum take off point should be at a position that best represents the average manifold pressure and has minimal pressure pulsations. A small restrictor may be needed at the manifold end of the hose to help reduce pressure pulsations. The take off point should not be teed in with other items such as idle speed control valves as they can affect the pressure reading. If used for Barometric Pressure Sensing Use a 105 kPa sensor.
18 Installation MoTeC Trigger Sensors (REF & SYNC) The trigger sensors supply the necessary timing information to the ECU so that it knows when to fire the fuel injectors and ignition system. Normally two sensors are used, REF and SYNC. Many different types of trigger sensors and chopper patterns may be used. The wiring and ECU setup information for the trigger sensors are specific to the particular system. Refer to the appropriate MoTeC drawing. Home made sensor systems often cause problems.
MoTeC Installation 19 Exhaust Gas Sensor (Lambda Sensor) The ECU may optionally use a wideband exhaust gas sensor for data logging or closed loop control of the Air Fuel Ratio. The ECU is compatible with the Bosch LSU Wideband sensor and the NTK Wideband sensor. These sensors are different to the sensors used on previous model ECUs. Note that the sensor heater must be connected to these sensors at all times and must be controlled by the ECU by connecting it to one of the Auxiliary Outputs.
20 Installation MoTeC Temporary wiring is likely to cause problems: use a proper eyelet terminal that is securely crimped to the ground wire. Studs fixed in place by Loctite® can also cause a problem as the Loctite® becomes an insulator. These comments apply to both the ECU ground wire and the Ignition system ground wire. The ground wire must be at least 12# (3.3 mm2) and must be kept as short as possible.
MoTeC Installation 21 Wire Splicing Preferably use a crimp splice. If soldering a wire splice, wire movement near the joint must be avoided otherwise a fracture may occur at the stress point created by the solder. Use heatshrink sleeving to insulate and provide support to the wires. Wire Strain Avoid pulling the wires tight at the connectors. Wire Movement Avoid wire fatigue by tying the wires down close to the connectors. Heat Keep the ECU wires away from the exhaust system.
22 Installation MoTeC Swirl Pot The swirl pot (header tank) maintains a reserve of fuel to avoid fuel starvation to the engine during cornering and acceleration. Fuel starvation can also cause damage to the pressure pump as it relies on the fuel for cooling, lubrication and speed limiting. The swirl pot also forms a header tank for the pressure pump since the pressure pump is not capable of lifting the fuel from the tank if the tank is lower than the pump.
MoTeC Installation 23 Fuel Lines The fuel feed lines must be high pressure type and should be at least 8mm (5/16 inch) diameter. The return lines should also be at least 8mm (5/16 inch) diameter to ensure that the fuel is easily returned to the tank. Use proper high pressure hose clamps to ensure that the lines do not blow off under pressure. Keep the fuel lines as cool as possible to avoid fuel vaporisation. The temperature of the fuel will also affect the mixture due to the change in fuel density.
24 Installation MoTeC If Using Throttle Position Load Sensing Leave the regulator port open to the atmosphere, unless the MAP sensor is connected to the manifold as is recommended when using idle speed control, in which case the regulator port should be connected to the manifold. Fuel Injectors The fuel injectors meter the fuel by opening for a short but defined time once per engine cycle (sequential operation). The injectors must be wired in the firing order of the engine.
MoTeC Installation 25 will operate correctly at 2.5 bar (29 psi) and some will operate up to 5 bar (73 psi). Current Different injectors require different operating currents. The ECU injector drives must be programmed to suit the injector using the Injector Current setup parameter. Pulse Width The amount of time that the injector spends open during each injection pulse is called the Injector Pulse Width and is measured in milliseconds (thousandths of a second), abbreviated as msec.
26 Installation MoTeC HEI Distributed High Energy Inductive (HEI) distributed ignition systems are generally limited to about 8000 RPM on an 8 cylinder engine but will run a 6 cylinder to 11,000 RPM and a 4 cylinder to 15,000 RPM. Most modern road cars run HEI ignition systems that are equally well suited to high performance engines as long as the above RPM restrictions are observed. Multicoil (HEI or CDI) HEI or CDI multicoil systems will generally run any engine to 15,000 RPM.
MoTeC Installation 27 The button must be a wide tip type to cater for a wide range of advance points since the advance is changed electronically rather than mechanically. Make sure that the button still overlaps the tower at the maximum advance point. The distributor should have no mechanical or vacuum advance as this is provided by the ECU. Spark Plug Leads The spark plug leads should be high quality Inductive Suppression leads such as Magnicor® leads and must be in good condition.
28 Installation MoTeC
MoTeC Initial Setup 29 Initial Setup Before attempting to start the engine the setup parameters must be correct. Use the MoTeC ECU Manager software to adjust the setup parameters. Preferably start with a calibration file from a similar engine as this will make setup faster and easier. Main Setup Injectors Injector Scaling (IJPU) Injector Current Injector Battery Compensation Refer to the ECU Manager help screens for details. Calculation Methods Efficiency Calculation Method. Load Calculation Method.
30 Initial Setup MoTeC Note that the trigger sensor type (Hall / Mag, Edges etc.) must be setup in the Sensor Setup screens. Ignition Ignition Type (IGN) Number of Coils (COIL) Ignition Dwell Table Ignition Delay Time These parameters are dependant on the type of Ignition Module. Refer to the appropriate MoTeC Ignition Module drawing or Ignition System drawing.
MoTeC Initial Setup 31 Refer to the ECU Manager help screens for details. Other Functions Ensure any other functions such as Boost Control, Traction Control etc. are all set appropriately. It may be best to start with any non essential functions turned off (e.g. Traction Control, Lambda Control etc). Refer to the ECU Manager help screens for details.
32 Initial Setup MoTeC
MoTeC Initial Calibration 33 Initial Calibration Before attempting to start the engine the calibration tables should be initialised to sensible values. Use the MoTeC ECU Manager software to initialise the ECU calibration tables. Preferably start with a calibration file from a similar engine as this will make initial calibration faster and easier. Clear any *s from the tables by selecting Clear *s from the ECU Manager software Tools Menu (Press the F9 key).
34 Initial Calibration MoTeC Fuel - MAP Check the Fuel - MAP compensation table. The fuel must be increased by 100% every 100 kPa increase in air pressure. Normally the MAP table should contain the following values, with a straight line increase between values. 0 kPa -100 100 kPa 0 200 kPa 100 300 kPa 200 400 kPa 300 500 kPa 400 This table is equally applicable whether the MAP sensor is used for barometric pressure measurement or for manifold pressure measurement.
MoTeC Initial Calibration 35 Ignition - Air Temp Check the Ignition - Air Temp compensation table. Typically the following table can be used : -20 -12 -10 -9 0 -6 10 -3 20 0 30 0 40 0 50 0 60 -3 70 -6 80 -9 90 -12 Other Ignition Compensation Tables Typically all other ignition compensation tables should be set to zero.
36 Initial Calibration MoTeC
MoTeC Initial Starting Procedure 37 Initial Starting Procedure The ECU Manager software should be used to assist during starting. The ECU Manager software allows all diagnostic errors and sensor readings to be checked and allows the injectors, ignition system and auxiliary outputs to be tested while the engine is stopped. The calibration tables and setup parameters should also be checked. Pre Start Checks Calibration Tables & Setup Parameters Check that all setup parameters have been set appropriately.
38 Initial Starting Procedure MoTeC Test the Sensors Before starting the engine, test that all sensors are giving sensible readings by viewing their values on the ECU Manager : View screen. Vary the sensor readings if possible to check for correct operation. Check that the Throttle Position Sensor varies smoothly from 0 to 100% when moved from fully closed to fully open. Note that the TPHI and TPLO setup parameters must have been set correctly for correct operation of the Throttle Position sensor.
MoTeC Initial Starting Procedure 39 Check that no REF or SYNC Diagnostic Errors occur during constant cranking. Diagnostic errors may occur as cranking winds up; this is OK, but the errors need to be cleared by pressing the Enter key while viewing the ECU Manager : Diagnostics Errors screen, so that constant cranking may be checked for errors. Diagnostic errors may occur as cranking winds down, this is also OK. Cranking Ignition Timing Check that the Ignition Timing is correct during constant cranking.
40 Initial Starting Procedure MoTeC If the engine won’t start • Check for correct fuel pressure. • Check for fouled plugs. • Re-check for diagnostics errors. • Re-check the Ignition Timing with a Timing Light. • Check the setup parameters against the drawings. • Check that the ignition is wired in the correct firing order. • Check that the ignition is firing on the compression stroke, not the exhaust stroke.
MoTeC Initial Starting Procedure 41 Injector Errors Open The Injector is open circuit - check the wiring. Short The Injector is short circuit - check the wiring. Peak The Injector peak current was not reached. Possible causes: • The Injector Current Setup Parameter IJCU is set too high. • The battery voltage is too low. Over Duty The injector duty cycle is too high, typically the duty cycle should not exceed 85%.
42 Initial Starting Procedure MoTeC SYNC Error The SYNC signal has occurred before expected. Possible causes: • A bad SYNC signal has caused extra SYNC pulses - check voltage levels with a scope. • A bad REF signal has caused missing REF pulses - check voltage levels with a scope. • Bad REF / SYNC alignment. • Incorrect Setup No SYNC Two or more consecutive SYNC pulses are missing. Possible causes: • No SYNC signal - check the wiring and SYNC sensor voltage levels with a scope.
MoTeC Calibration 43 Calibration The Calibration Tables determine how the output devices should be controlled for various sensor readings. For example the Fuel - Main Table determines the pulse width for the Fuel Injectors for all combinations of RPM and Load. The ECU Manager software should be used to adjust the various calibration tables to suit the engine. Warning Alarms Set the Warning Alarms to warn if the engine temperature goes too high. (The warning alarms may be set in the Functions menu).
44 Calibration MoTeC To insert or delete sites use the Tools menu (press the F9 key). When sites are inserted or deleted, the calibration tables may be adjusted so that the new sites do not affect the tuning. Dyno Calibration The alternator should be connected while tuning the engine to ensure that the injectors are working at normal operating voltage. The exhaust system should be the same as that in the vehicle as it will affect the engine tuning.
MoTeC Calibration 45 closest to the current engine operating point. The Quick Lambda feature may only be used if the ECU is directly measuring the Lambda reading. The desired Lambda value must be set in the Functions - Lambda Control Table. If the maximum value in the table falls below 60 then the setup parameter IJPU should be decreased to increase the table values. This ensures that the table has sufficiently fine resolution.
46 Calibration MoTeC The Quick Lambda feature may also be used from the Ignition Main Table, which allows ignition timing adjustments to be made while also maintaining correct mixture readings. Use the View - Ignition Screen to check that all the fuel trims and compensations are correct (Press the V key). Refer to the ECU Manager software help for more details (Press F1).
MoTeC Calibration 47 Data Logging & Road Testing The calibration must be verified on the road. This is best done by logging the air fuel ratio and other sensors and checking them using the MoTeC i2 software. Data Logging is also very useful for identifying unexpected problems such as an incorrect air temperature reading due to fuel vapour cooling the sensor or excessive air temperature due to hot air entering the intake system.
48 Calibration MoTeC
MoTeC ECU Manager Software 49 ECU Manager Software Introduction The following is an overview of the main concepts of the ECU Manager software. More detailed information is available from the online help. The ECU Manager software is used for : • Calibration and Setup • Sending calibration files to the ECU • Viewing Sensor readings • Viewing Diagnostics information • Testing the Outputs • Unloading the logged data • Upgrading the ECU firmware • Enabling ECU options.
50 ECU Manager Software MoTeC Online Help Online help is available in two forms: Context sensitive help is available by pressing F1 or clicking on the help button, this shows help that is relevant to the current screen. General help is available from the Help menu. Main Menu The Main Menu is used to access all of the features of the ECU Manager software.
MoTeC ECU Manager Software 51 ECU Status: Connected or NOT Connected (if the ECU is connected the ECU firmware version is also shown). If the ECU is not connected the reason that it is not connected is shown where the Diagnostics Errors are normally shown. The number of diagnostics errors (if the ECU is connected) Calibration Files ECU Manager records the ECU calibration and setup data in files that are stored on the PC hard disk, this ensures that a permanent record of the data is kept.
52 ECU Manager Software MoTeC Matching Versions The version of ECU Manager and the version of the firmware in the ECU must match in order to be able to communicate with each other. To communicate with an ECU that has older firmware in it, either the matching ECU Manager software must be used or the ECU firmware must be upgraded to match the version of ECU Manager on the PC. Upgrading the ECU To upgrade the ECU firmware select Upgrade ECU Version from the Utilities menu.
MoTeC ECU Manager Software 53 Screen Layouts The screen layouts are completely user definable and may be optimised to suit the user’s preference, the screen resolution and the task to be performed. For example it may be useful to have screen layouts to suit different types of engines or to perform particular tasks such as Idle Control or individual cylinder tuning. The image above shows one possible screen layout that suits an 800x600 screen.
54 ECU Manager Software MoTeC To change the properties (settings) of any object, right click on the object and select Properties. To delete an object, right click on the object and select Delete. Adjust Tables and Adjust Graph Objects In order to make adjustments the layout page must contain an Adjust Table or an Adjust Graph or both. Note that only one Adjust Table and one Adjust Graph are allowed per page.
MoTeC ECU Manager Software 55 To do this select Reverse Y-Axis on the Tools menu or press the Y key. Making Adjustments On Line / Offline Changes may be made directly to the ECU (Online) or to a file (Offline). Online (ECU Connected) To make changes directly to the ECU, connect the ECU then select Open ECU from the File menu. When the ECU is opened the calibration data is first retrieved from the ECU then matched to a file.
56 ECU Manager Software MoTeC Selecting the Adjust Table Once a file or the ECU has been opened, the appropriate table or setup screen may be selected from the Adjust menu by using the mouse or the keyboard. To select the Adjust menu using the keyboard hold down the Alt key followed by the A key then use the arrow keys and the Enter key to make a selection. Alternatively, the Adjust menu may be displayed by pressing the Esc key.
MoTeC ECU Manager Software 57 The cursor may be moved using the arrow keys, or by pressing the Spacebar which will automatically move the cursor to the current engine operating point. Note that the table does not show all values at once. To view the additional values move the adjustment cursor to the edges of the table using the arrow keys, this will cause the table to scroll and show the hidden values.
58 ECU Manager Software MoTeC Up / Down Adjustment Up or Down adjustments may be made to the selected table value using the PgUp and PgDn keys. Fast adjustments may be made by holding the Ctrl key down while pressing the PgUp or PgDn keys. This will increment the value by ten times the normal amount. If the PgUp or PgDn keys are held down the value will continue to change until the key is released.
MoTeC ECU Manager Software 59 pressing the F8 key. The adjustment is made to the value closest to the current engine operating point. This feature may be performed from the Fuel - Main Table or from the Ignition - Main Table. Quick Lambda can also be used to trim the Fuel - Individual Cylinder Tables by pressing the Q key while the particular table is selected. Note that this feature requires a Wideband Lambda sensor or meter to be connected to the ECU.
60 ECU Manager Software MoTeC Tools The Tools Menu allows selection of various functions as listed on the menu below. The Tools Menu may also be displayed by pressing the F9 key, in this case the previously selected item will be highlighted which makes it easier to do repetitive operations. Note that the items on the menu will changes depending on which adjust table is shown. For example, Quick Lambda is not available for all tables. The letter to the right of some menu items is the “hot key”.
MoTeC ECU Manager Software 61 Compare Mode shows the difference between the current file and the selected comparison file. When Compare Mode is turned on, the selected compare file description is shown on the status line at the bottom of the screen. The comparison file may be selected by choosing Select Compare File from the Tools menu. When Compare Mode is turned on, an icon will appear at the left of the Adjust Menu items that contain differences.
62 ECU Manager Software MoTeC Quick Lambda + Copy Up & Right As for Quick Lambda except that the new value is copied to the sites immediately above, right and diagonally above and right if the sites do not contain a *. Lambda Was Adjusts the fuel table value by an appropriate amount by comparing the value entered by the user to the desired Lambda value in the Lambda Table.
MoTeC ECU Manager Software 63 Note that it may be necessary to use the Backspace key to mark the desired points with an *. Copy Vertical Column Right Copies the data in the current column to the column immediately to its right. Copy Horizontal Row Up Copies the data in the current row to the row above. Copy Site Up And Right Copies the value of the current site to the sites immediately above, right and diagonally above and right if the sites do not contain an *.
64 ECU Manager Software MoTeC Set with * Sets an * on the current site whether or not the engine is currently at that site. Copy Table from Another File Copy a table from another calibration file into the current table. Warning - The current table data will be overwritten. Import CSV File Read a CSV (Comma Separated Value) file into the current calibration table. Normally the CSV file is one that has been written out from another configuration file, possibly for a different ECU type.
MoTeC ECU Manager Software 65 View Screen The View Screen may be shown by pressing the V key or by selecting the desired view page from the View menu. The View Screen displays all the operating details of the ECU including: • Sensor data • Diagnostics errors • Fuel injection detail including all trims and compensations • Ignition detail including all trims and compensations • Boost control detail • Status information • Output Status • Internal voltages etc.
66 ECU Manager Software MoTeC Testing the ECU Outputs The ECU Outputs (Fuel Injectors, Ignition Outputs and Auxiliary Outputs) may be tested by selecting Test Outputs from the Utilities menu. This allows verification of the operation of the wiring and actuators. It is also very useful in checking that the injectors are wired in firing order. ECU Password A password may be set in the ECU to stop unauthorised access to the ECU configuration data.
MoTeC ECU Manager Software 67 Keyboard Reference PgUp PgDn Ctrl+PgUp Ctrl+PgDn Shift+PgUp Shift+PgDn Enter Alt+X Esc Tab Spacebar Adjust Up Adjust Down Fast Adjust Up Fast Adjust Down Slow Adjust Up (Not available on all tables) Slow Adjust Down (Not available on all tables) Set the adjusted Value Close the ECU or File Show the Adjust menu with the current screen item highlight Select the next Layout page Jump the cursor to the site closest to the current engine operating point F1 Show Help F3 Show the
68 ECU Manager Software MoTeC
MoTeC Appendices 69 Appendices Appendix A: General Specifications Physical Case Size: 147mm x 105mm x 40mm (5.8in x 4.1in x 1.6in) Weight: 0.50 kg (1.10lb) Power Supply Operating Voltage: 6 to 22 Volts DC Operating Current: 0.
70 Appendices MoTeC Appendix B: Sensor Supplies Maximum Current 5V ENG Sensor Supply: 0.20 Amps Max 5V AUX Sensor Supply: 0.15 Amps Max 8V ENG Sensor Supply: 0.30 Amps Max 8V AUX Sensor Supply: 0.30 Amps Max Accuracy / Temp Drift 5V ENG Sensor Supply: ± 0.5% max at 25°C + 100ppm/°C max 5V AUX Sensor Supply: ± 0.
MoTeC Appendices 71 Appendix C: Input Characteristics Analogue Voltage Inputs Suitable for: Potentiometers, voltage output sensors and Variable resistance sensors. Measurement Voltage Range: 0 to 15 V Input Resistance: 100k ohms to 0 V Resolution: 3.74 mV Filter: 150Hz 1st order Measurement Method: Absolute • Note that variable resistance sensors require a pullup resistor to the 5V sensor supply.
72 Appendices MoTeC Trigger Levels: Programmable 0 to 15V Hysteresis: Individually programmable high and low levels. Lambda Inputs Wideband Sensor Type: NTK or Bosch LSU 4.0, 4.2, 4.9 Measurement Range : 0.70 to 32.0 Lambda Narrow Band The LA1S and LA2S inputs may be used to measure the voltage of normal narrow band oxygen sensors. If closed loop control is to be used then an external 33k ohm bias resistor from the input to 0V is required to bias the input to Stoichiometric (0.
MoTeC Appendices 73 Appendix D: Auxiliary Output Characteristics The following tables list the characteristics for the Auxiliary Outputs. Output Low Side Driver High Side Driver General Nominal Max Current (A) Min Current Limit (A) Nominal Max Current (A) Min Current Limit (A) Flyback Voltage (V) Max Freq (Hz) AUX1 5 7* 5 7 Recirculate 10000 AUX2 5 7* 5 7 Recirculate 10000 AUX3 1 3 - - 60V 10000 AUX4 1 3 - - 60V 10000 AUX5 1 3 0.7 0.
74 Appendices MoTeC Appendix E: Ignition Output Characteristics Source Current: 20mA (Single Coil / Coil per Plug) / 40mA (Wasted Spark) Source Voltage: 5.7V max at 20mA, 4.
MoTeC Appendices 75 Appendix F: Injector Output Characteristics The Injector outputs can operate in two modes: Peak and Hold mode and Saturated mode. Peak and Hold Mode This mode is normally required for low resistance injectors (5 ohms or less). This mode allows the injector current to build up to a high value to open the injector and is then reduced to minimise power dissipation in the injector. Normally this means that the ECU has to dissipate a large amount of power.
76 Appendices MoTeC Appendix H: Wire Specifications M22759/16 Wire Ratings (For Various Wire Gauges) Insulation Material Tefzel Conductor Tin Plated Copper Voltage Rating 600 V Maximum Temperature 150 °C Wire Gauge (AWG) Cross Sectional Area (mm2) Max Current at 100 °C Ambient (Amps) Resistance (ohm / m) Resistance (ohm / 1000 ft) 22 0.38 5 0.045 14 20 0.61 6 0.028 8.5 18 0.96 9 0.018 5.5 16 1.2 12 0.014 4.3 14 1.9 18 0.009 2.7 12 3.0 24 0.006 1.
MoTeC Appendices 77 Appendix J: CAN Wiring - Multiple Devices The CAN bus should consist of a twisted pair trunk with 100R (0.25Watt) terminating resistors at each end of the trunk. The preferred cable for the trunk is 100R Data Cable but twisted 22# Tefzel is usually OK. The maximum length of the bus is 16m (50ft) including the MoTeC CAN Cable (PC to CAN Bus Communications Cable) CAN Devices (such as MoTeC ADL, BR2 etc.) may be connected to the trunk with up to 500mm (20in) of twisted wire.
78 Appendices MoTeC Appendix K: CAN Bus Wiring - Single Device When a single device (such as an ECU) is connected to the CAN bus the wiring scheme shown below may be used to provide a connection point for the MoTeC CAN cable. If the wiring length is less than 2m (7ft) the terminating resistor is recommended but not essential. If other devices are connected to the CAN bus a special wiring scheme is required. See CAN Bus Wiring Multiple Devices.
MoTeC Appendices Appendix L: Pin list by Function M84 Pin No Abbrev Description VBAT GND Battery Positive Battery Negative Battery A26 A10,A11 Sensor Supplies A12 A2 B16 A13 A9 B15 8V-ENG 5V-ENG 0V-ENG 8V-AUX 5V-AUX 0V-AUX 8V Engine Sensor Supply 5V Engine Sensor Supply 0V Engine Sensor Supply 8V Auxiliary Sensor and CAN Supply 5V Auxiliary Sensor Supply 0V Auxiliary Sensor Supply Auxiliary Outputs A18 A1 A23 A24 A31 A32 A33 A34 AUX1 AUX2 AUX3 AUX4 AUX5 AUX6 AUX7 AUX8 Auxiliary Output 1 Auxilia
80 Appendices Pin No Abbrev Description Analogue Voltage Inputs A14 A15 A16 A17 A25 B20 B21 B22 AV1 AV2 AV3 AV4 AV5 AV6 AV7 AV8 Analogue Voltage Input 1 Analogue Voltage Input 2 Analogue Voltage Input 3 Analogue Voltage Input 4 Analogue Voltage Input 5 Analogue Voltage Input 6 Analogue Voltage Input 7 Analogue Voltage Input 8 Analogue Temp Inputs B3 B4 B5 B6 B7 B19 AT1 AT2 AT3 AT4 AT5 AT6 Analogue Temperature Input 1 Analogue Temperature Input 2 Analogue Temperature Input 3 Analogue Temperature In
MoTeC Appendices Appendix M: Wiring Schematic 81
82 Notes MoTeC
MoTeC Notes 83
84 Notes MoTeC
