PlugIn Installation Manual - Link Engine Management
Contents
1. Engine Management Link G4 Plug In ECU Nissan Skyline GTS GTR Installation Manual Copyright 2010 Link ElectroSystems Ltd PCLink Notice Due to frequent upgrades PCLink is not distributed wth newG4 ECUs PC Link is available for free download at our veb site ww LinkECU com Should internet dowmload not be practical a copy of the latest version of PCLink on CD can be requested from your nearest Link Dealer 4 Plugin Installation Manual Table of Contents Part Part Il 1 2 Part Ill 2 Part IV i 2 3 Part V Part VI 1 2 3 4 5 6 8 Part VII 2 Part VIII Introduction 6 Safety Notice coia EEEE NTN RRR NAN rie linia 6 M EU OT GE H Support Options EEN 7 Pre Installation 8 GEET ul ET 8 Nissan Skyline GTS GTR TEE 8 Injector Impedancg icr iii ilaele a rn 8 Nissan Skyline GTS GTR E TEE 8 Installation 9 ECU Handling Procedures iii 9 Fitting the ECU sisiiissmsisssi tissa e im n TIM TN i ksi ln 10 Fitting a Nissan ECU iisa ellenica iii 10 Additional Sensors 11 E TI E 11 Nissan Skyline GTS GTR EE 11 JAT SG ISON sessa ilaele gas 11 Nissan Skyline GTS GTR EE 11 Expansion Connector oil 12 Nissan Skyline GTS GTR iuuli iii iaia 12 PC Tuning 13 installing USB Drivers 2i s si sisssansnidnnaknanansnnnnndkask a an decetedaegeeceseeecetddbecuecccececeteceezecacceeeseeddeeeees 13 Installing PCLink Tuning Software aaaaaaaaaaaaasan2. An Volt 2 Analogue 0 5V input An Temp3 Temperature sensor input An Temp4 Currently not connected Gnd 5V DI 5 DI 6 Volt 8 Volt 2 Temp3 Temp4 Sisi c 2009 Link ElectroSystems Ltd PC Tuning 13 5 PC Tuning G4 ECUs require PC laptop tuning using the PCLink Tuning Software application running on a Windows based computer PCLink may be downloaded from www LinkECU com Note that when new versions of PCLink are released they are posted on the website and may be downloaded at no cost Also note that G4 ECUs must be used with the correct version of PCLink IMPORTANT The G4 ECU has on board USB BEFORE connecting the ECU to your laptop the USB drivers must be installed Failure to install the drivers on your laptop first may result in windows assigning incorrect drivers These drivers will not work with the G4 ECU and are difficult to uninstall 5 1 Installing USB Drivers Before connecting the ECU to your laptop or PC the ECU USB drivers must be installed These drivers are installed as part of PCLink Tuning Software installation as described in the following section Should internet download not be practical a copy of the drivers on CD can be obtained from your nearest Link dealer 5 2 Installing PCLink Tuning Software Due to the freguent updates PCLink Tuning Software is no longer shipped with each ECU You will be reguired to download the latest version of PCLink Tuning Software from www LinkECU com Should acc
3. If not check the MAP Sensor Type setting and perform a MAP Calibration c ECT should read current engine temperature d IAT should read current intake air temperature e Digital Inputs Operate switches connected to any digital inputs while watching the runtime value to ensure they operate as expected 4 Rectify any faults found in Step 3 5 Click on the Fuel heading then Fuel Set up a Locate the Master setting This will need to be adjusted during or just after start up 6 Crank the engine until it starts Some throttle may be required for first time start up due to imperfect tuning If necessary adjust the Master setting to enrich lean the engine increase to enrich 7 If the engine fails to start after several attempts do not crank it endlessly Stop and determine the problem before continuing 8 Check the Trigger Error Counter found under the Triggers runtime values tab If this value increases during cranking running then there is a trigger setup fault It is not unusual for this number to count one or two on the first engine revolution 9 Once the engine starts adjust the Master under fuel settings setting to achieve best possible running 10 The engine should now be allowed to fully warm up It may be necessary to readjust Master several times to maintain smooth running Don t forget to keep an eye on engine temperature 11 Once the engine is warmed up and running well pe
4. body Installing in the manifold is not recommended due to heat soak issues A fast response sensor must be used in all forced induction applications 4 2 1 Nissan Skyline GTS GTR The Link G4 Nissan GTS GTR Plug In ECU supports several options for fitting of a IAT sensor Either of the following options can be used 1 Factory Fitted IAT Sensor GTR Only GTR models are factory fitted with an IAT sensor This sensor is wired to An Temp 2 2 IAT Through Expansion Connector The expansion connector provides ground and temperature channels for the connection of an IAT sensor c 2009 Link ElectroSystems Ltd 12 Plugin Installation Manual 4 3 Expansion Connector The expansion connector is provided to allow easy connection of additional ECU inputs An expansion cable needs to be purchased from your Link dealer Important points when wiring to the expansion connector e Do not overload the 5V Out pin Although this is protected against ECU damage the 5V out signal also provides power for other sensors e Do not connect the ground pin to chassis ground This could cause ground loops and introduce unnecessary interference Use this pin only to ground external sensors that are isolated from chassis ground 4 3 1 Nissan Skyline GTS GTR The following expansion connector inputs outputs are provided Gnd Sensor Ground Only 5V Out Low Current 5V Supply DI5 Digital Input DIG Digital Input An Volt 8 Currently not connected
5. some pre installation checks must be performed Board Switch Settings Some Link G4 ECUs require switches on the board to be set before installation Nissan Skyline GTS GTR ECU R34 GTR models are wired with their trigger engine position signals wired in opposite polarity to other models To allow for this four dip switches have been provided on the ECU Set the DIP switches according to the diagram below n o Other VC mm gt um 7 Models C mm lt FI mu pa Injector Impedance Injector impedance is important and needs consideration before installing the ECU Nissan Skyline GTS GTR ECU The Nissan GTS GTR G4 Plug In ECU is NOT designed to be used directly with low impedance injectors GTR models are fitted with LOW impedance injectors run via factory fitted ballast resistors This ECU has been designed to be used with HIGH impedance greater than 6 Ohms injectors Ballast resistors must be wired if low impedance injectors are to be used This means that the ECU is plug in compatible with factory fitted injector ballast combinations on all models However if fitting low impedance injectors e g fitting GTR injectors to a GTS then ballast resistors must be wired Contact your nearest Link dealer to purchase a ballast resistor pack if required c 2009 Link ElectroSystems Ltd Installation 9 3 Installation This guide provides information on correctly and safely installing your new Link G4 Plug In EC
6. An Temp channel the sensor has been wired to Ensure that channel and only that channel is set to Inlet Air Temperature Select the correct Temp Sensor Type Select the Analog Inputs tab in the runtime values section of PCLink lower part of the screen Ensure that IAT reads the correct temperature CON OO A OO N Perform a Store by clicking on the S button top centre of screen or press F4 6 6 Ignition Mode Selection Correct Ignition mode selection is essential for the vehicle to run properly 6 6 1 Nissan Skyline The Nissan Skyline G4 Plug In ECUs have four ignition drivers This means that on a six cylinder engine the ignition coils are run in a wasted spark configuration For future upgrade reasons Ignition 3 and Ignition 4 channels are joined together It is essential to ensure that Ignition Channel 4 is not operating otherwise its signal will effect Ignition Channel 3 Do this by performing the following steps 1 Connect a laptop notebook PC to the ECU and connect to the ECU using PCLink c 2009 Link ElectroSystems Ltd Pre Start Configuration 2 Click on Auxiliary Outputs Ign in the configuration tree 3 Select Ignition Drive A 4 Ensure that channels Function is set to Not Selected 5 Perform a Store by clicking on the S button top centre of screen or press F4 6 7 Input and Output Setup As the Link G4 Plug In ECUs are designed to run several models there are a few i
7. U 3 1 ECU Handling Procedures WARNING The following installation process will require handling of both the Link ECU and factory ECU Both of these are highly sensitive to electrostatic discharge and are easily damaged Follow the anti static precautions given in this manual carefully to avoid damaging electronic components Warranty claims for ECUs damaged by electrostatic discharge will NOT be accepted ANTI STATIC HANDLING GUIDELINES Your body builds up an electrical charge as you move around This charge can reach very high voltages Whenever given the opportunity this energy will attempt to discharge usually through your finger tips This can be fatal to most electronic components Most people have experienced an electrostatic discharge when they step out of their car or touch a metal bench top 1 The following guidelines describe precautions that can be taken to reduce the possibility of damaging your ECU 2 Work only on a conductive surface A clean steel bench is suitable 3 Always wear a wrist strap that is electrically connected to the conductive working surface 4 Touch the working surface regularly 5 Do NOT touch components on the circuit board 6 Where possible only handle the ECU by its plastic header 7 Do NOT carry the ECU around without anti static packaging 8 Do NOT touch the bare terminals in the ECU header Observing the above procedures will minimise the chance of damaging the ECU Note that fa
8. afe manner Do not tune your vehicle while operating it on public roads Obey road rules at all times WARNING Failure to follow all installation and operating instructions may result in damage to the Link ECU personal injury or harm to property c 2009 Link ElectroSystems Ltd Introduction 1 2 Disclaimer All care has been taken to ensure the pin outs and interconnections of the ECU to the vehicles wiring harness are correct However due to variations between vehicle models it is the installers responsibility to check wiring connections BEFORE installing the ECU Link will not be held responsible for any damage caused by the incorrect installation of this product 1 3 Support Options Should any issues arise during installation the following options exist for technical support 1 PCLink help press F1 while running PCLink 2 Contact your nearest Link dealer A Link dealer list is available on our website 3 Link website www LinkECU com 4 Technical Support Email tech LinkECU com 5 Online Discussion Board Available from the Link website The majority of guestions received by the technical support team are clearly answered in the manuals To speed up your technical inguiry please consult the manuals to make sure that your guestion has not already been answered c 2009 Link ElectroSystems Ltd e Plugin Installation Manual 2 1 2 2 2 2 1 Pre Installation Before installing theLink G4 ECU into the vehicle
9. age Correction is properly set up then changes in the battery voltage will not affect the air fuel ratio The injector dead time table allows the dead time for different battery voltages to be entered The values represent the dead time in milliseconds These should increase with falling system voltage Injector dead time for a particular set of injectors can be determined using a flow bench or ona running engine To determine the injector dead time using a flow bench the injectors need to be operated at the intended operating pressure normally three bar and at a constant duty cycle as well as a set voltage Vary the supply voltage to the injector and measure minimum pulse width at which the injectors will flow for a particular voltage This is the required dead time for that injector at that tested voltage To determine injector dead time on a running engine with the engine fully warmed and operating at stable air fuel ratios a very precise AFR meter is required a narrow band O2 sensor will not suffice electrical drain needs to be applied to the system the preferred method is disconnecting the alternator main fuse Battery load testers are also useful here too Watching the air fuel ratios change while the battery voltage drops the dead time table can be trimmed to maintain the same stable air fuel ratio Injector dead time can be viewed as a row graph Asmooth curve needs to be maintained at all times NOTE any change to the fu
10. e G4 software platform boasts an impressive list of features giving a new level of user adjustment This flexibility allows the tuner to have complete control over the engine management system G4 software employs high resolution fuel and ignition tables with configurable load and RPM centres When coupled with up to six dimensional fuel and ignition mapping barometric pressure compensation and intake air temperature correction this gives an unprecedented level of tuning accuracy All Link G4 ECUs are in field upgradeable there is no need to return the unit for software updates All Link G4 Plug In Engine Management Systems are designed with flexibility and ease of installation in mind Link Plug In systems are deigned to replace the circuit board inside the factory ECU enclosure This provides an invisible install that requires minimal modification to vehicle wiring and ECU mounting Link Engine Management Systems are designed with the final result in mind Not only do they boast an impressive range of performance features but are designed with a focus on safety reliability and drive ability However the ultimate success of your engine management upgrade is determined by how well the system is installed and tuned Installing and tuning any after market engine management system is not to be taken lightly G4 ECUs give the tuner the control amp flexibility that only top after market engine management systems in the world can provide While every e
11. el pressure or injectors will require a recalibration of the injector dead times c 2009 Link ElectroSystems Ltd Plugin Installation Manual Master Master should be set so that the numbers in the middle of the fuel table end up around a value of 50 This is to allow sufficient span of the numbers in the main fuel table c 2009 Link ElectroSystems Ltd Pin Functions 21 8 Pin Functions A list of pin functions is provided this is useful when configuring your ECU through PCLink 8 1 Nissan Skyline GTS GTR Tee sa Jeer Auxiliary Outputs Aux 5 Aux 6 FP Relay FP Relay FP Relay Aux Injection Outputs Analog Channels An Volt nt MAP Sensor An Volt 6 Oxy Signal Front Oxy Signal Front an Torp Eor An temp covet CS Digital Inputs 9 U N c 2009 Link ElectroSystems Ltd 22 Plugin Installation Manual 9 Pinouts Pin information is provided to assist when troubleshooting All pinouts are looking into the ECU wire side 9 1 Nissan Skyline GTS GTR CS SE JN ENEMA SEN S50 sd DEES Cd EEOEEKEK DEDOGOHO ES Mall petite Tele gagag Fn ooe O Aux 6 DI 1 An Volt 4 gt S x An Temp 1 c 2009 Link ElectroSystems Ltd Known Issues 23 10 Known Issues All plug in EC Us are fully tested on a range of relevant vehicles although there are often variations that have not been tested For this reason issues can arise Please contact your nearest Link dealer when su
12. engine is running The following steps detail correct set up procedures for some of the more critical ECU parameters note that MAP Sensor Calibration should have already been completed by now Injector Voltage Dead time Correction There is always a delay between the injector being energised and the injector actually opening Likewise there is a small delay between the injector being de energised and the injector closing The opening time is considerably longer than the closing time however the overall result is that less fuel will flow for a given pulse width than would be expected with an ideal injector To compensate for this the injector pulse widths are increased to compensate for this dead time The dead time for a given injector is a function of the battery voltage differential fuel pressure and the type of injector driver saturated or peak and hold A typical dead time at 3 Bar differential fuel pressure and 14 volts is just under 1ms ms millisecond 1 thousandth of a second In applications with a linear 1 1 fuel pressure regulator i e not a rising rate regulator the differential fuel pressure difference between manifold pressure and fuel pressure will be constant Therefore the only variable that is changing will be the battery voltage this changes with electrical load and sometimes engine speed Without correction the changes in dead time will cause the engine to run lean when the voltage drops If the Injector Volt
13. er devices such as boost gauges or blow off valves 4 1 1 Nissan Skyline GTS GTR The Link G4 Nissan GTS GTR Plug In ECU supports several options for fitting of a MAP sensor Any one of the following options can be used 1 Internal MAP Sensor To ease installation the G4 Nissan GTS GTR ECU is fitted with an internal MAP sensor This sensor is rated to 2 5 Bar absolute pressure 1 5 Bar of boost The internal MAP sensor is wired to An Volt 1 2 MAP Sensor Wired Through AFM To avoid running additional wires into the engine bay a MAP signal can be brought in through either of the AFM signal wires The rear AFM is wired to An Volt 4 while the front AFM GTR only is wired to An Volt 6 Refer to factory wiring manuals for AFM wiring connections Make sure the AFM can not be reconnected 3 MAP Via Expansion Connector The expansion connector provides power ground and analogue channels for the connection of a MAP sensor Make sure that the correct An Volt channel has been selected as MAP sensor in PCLink and a MAP calibration has been performed before attempting to start the vehicle 4 2 IAT Sensor It is highly recommended that an IAT sensor be fitted in all applications to provide an input for correction of fuel and ignition based on the engines air charge temperature An IAT sensor should be fitted in the intake system in a location that accurately represents intake temperature The most common location is just prior to the throttle
14. ess to an Internet connection be impractical the latest version of PCLink Tuning Software can be reguested from your nearest Link dealer on CD Installing from the web 1 Go to the above website and navigate to the downloads and software updates section 2 Download the latest version of PCLink When prompted to run or save the file select save lt is recommended to save this file on the desktop 3 Double click the saved file and follow on screen instructions 4 When prompted to install USB drivers select yes This may take some time 5 When installed open PCLink by double clicking on the icon that has been placed on the desktop Installing from a CD Insert the PCLink disk into you computer s CD ROM drive Open My Computer Double click your CD ROM drive Double click the file labelled PCLinkSetup exe or similar name Follow the on screen instructions When prompted to install USB drivers select yes This may take some time When installed open PCLink by double clicking on the icon that has been placed on the desktop NOUDSWNE c 2009 Link ElectroSystems Ltd 14 Plugin Installation Manual 5 3 Communicating With Your ECU After PCLink installation you will be able to connect the G4 ECU to the laptop to perform set up and tuning work 1 Connect the ECU to your laptop using a Link G4 ECU USB Cable If not supplied with the ECU these can be purchased from a Link dealer No other adapter or cab
15. ffort has been made to keep G4 ECUs as user friendly as possible it should be recognised that added features bring added complexity The complete setup of your ECU can be divided into two important tasks 1 This manual covers the installation of your G4 ECU While it is not strictly essential that this work is performed by an automotive electrician the knowledge and tools available to these professionals makes it highly recommended Regardless of who does the installation it is of utmost importance that instructions provided in this manual are followed exactly throughout the installation 2 Once the G4 ECU has been installed it will need to be tuned using a laptop computer with PCLink software Information on the configuration and tuning of the G4 ECU is detailed in the online help section of PCLink G4 ECUs are shipped pre loaded with a base configuration that should be close enough to get most engines running after a few application specific adjustments have been made While hearing the engine running on the new ECU for the first time is always a Satisfying feeling it is important to realise that the job is not complete The amount of tuning performed and the experience of the tuner are the two most important factors in determining how happy you will be with your engine management system 1 1 Safety Notice Your Link Plug In ECU is designed to enhance the performance of your vehicle However in all cases your vehicle must be operated in a s
16. iggers 4 Perform the correct trigger calibration procedure specific to your vehicle as described in the PCLink Tuning Software online help Press F1 Note that trigger calibration must be performed again once the engine is running Due to the acceleration and deceleration of the crankshaft at low speeds an inaccurate measurement of engine timing is usually made Also it is often harder to see timing marks with a timing light at slow engine speeds Trigger calibration should be checked again at between 2000 4000 RPM where engine speed is stable and a more consistent timing reading can be obtained c 2009 Link ElectroSystems Ltd e Plugin Installation Manual 7 _ First Time Startup After performing all set up instructions given in previous sections including trigger calibration the engine is now ready to be started The following procedure should be used for first time start up 1 Turn the ignition key OFF then ON The fuel pump should prime momentarily upon power up 2 Connect the ECU to PCLink 3 Click on each of the runtime value tabs located about two thirds of the way down the screen and check that all values are as expected Where possible operate sensors e g TPS to ensure correct readings are displayed The following values should be checked a TPS spans from 0 to 100 when throttle is pressed If not perform a TPS Calibration b MAP should read approx 101 kPa at sea level with the engine not running
17. ilure due to static damage often does not appear until well after it was caused c 2009 Link ElectroSystems Ltd 10 Plugin Installation Manual Fitting the ECU 3 2 3 2 1 Information is provided to assist in fitting the ECU into the vehicle Fitting a Nissan ECU The following steps outline the installation procedure 1 Remove the factory ECU from the vehicle Ensure the key is in the OFF position The factory ECU is located on the left side A pillar Remove the left kick panel Unplug the wiring harness from the factory ECU use a 10mm socket to unwind the connector while gently pulling on it Remove the 6mm bolts 10mm socket that retain the ECU and remove the ECU from the vehicle DO NOT touch the exposed pins in the factory ECU connector Remove the factory ECUs circuit board from its enclosure Ensure you are following the given anti static guidelines and ARE WEARING ACONDUCTIVE WRIST STRAP connected to a conductive working surface Remove the top and bottom covers from the ECU enclosure by removing the four corner retaining screws Remove the circuit board by removing the retaining screws Hold it only by the plastic header and place it aside Fit the Link Plug In ECU Remove the ECU from its packaging and place it immediately in the factory enclosure Place the factory ECU in the packaging your Link ECU came in for its protection It may be necessary to remove the screws that retain the blue header Th
18. ink ElectroSystems Ltd Are subject to the following and only the following LIMITED EXPRESS WARRANTIES and no others For a period of one 1 year from and after the date of purchase of a new Link ElectroSystems Ltd Product Link ElectroSystems Ltd Warranties and guarantees only to the original purchaser user that such a product shall be free from defects of materials and workmanship in the manufacturing process A product claimed to be defective must be returned to the place of purchase Link ElectroSystems Ltd at its sole option shall replace the defective product with a comparable new product or repair the defective product This expressive warranty shall be inapplicable to any product not properly installed and properly used by the purchaser user or to any product damaged or impaired by external forces This is to the extent of warranties available on this product Link ElectroSystems Ltd Shall have no liability whatsoever for consequential damages following from the use of any defective product or by reason of the failure of any product Link ElectroSystems Ltd Specifically disclaims and disavows all other warranties express or implied including without limitation all warranties of fitness for a particular purpose except for those which apply to product or part thereof that is used or bought for use primarily for personal family or household purposes warranties of description warranties of merchantability trade usage or warrantie
19. ling is required Connect the cable to the connector labelled USB 2 If this is the first time you have connected a G4 USB ECU to you laptop follow the driver installation instructions that appear When prompted if you want to install drivers select Continue Anyway 3 Start PCLink by double clicking on the PCLink icon on the windows desktop 4 Switch the key to the ON position This will provide power to the ECU 5 In PCLink under the Options menu select Connection The connection options dialogue will open Select the correct COM Port number from the drop down list or select auto for automatic com port detection 6 PCLink offers both mouse and keyboard control To establish a connection between the PC and ECU using the mouse click the L icon located near the top centre of the PCLink screen Alternatively using the keyboard press and hold the Ctrl Shift and L keys The same process can be used to disconnect If a successful connection is established PCLink will download settings from the ECU otherwise you will be warned that an error has occurred 7 Make sure the connection shows ONLINE in the top right corner of PCLink The logo should also be spinning in the top right corner 8 To permanently STORE any changes made to the ECU click on the S icon near the top centre of the screen or press F4 If this is not done before turning the ECUs power off all changes made will be lost c 2009 Link ElectroSystem
20. nuannnnunnnnnunnnnnunnnnnunnnununnnnnnnnnununnnnnunnnn 13 Communicating With Your ECU 2aaaaaaaaaaaaaaaaaannaannnnunnnnnunnnnnunnnnnunnnnnunnnununnnnnannnunnnnnnna 14 Pre Start Configuration 15 Firmware Version saessarsno sena kassan dla iii iran 15 Base Configurationi criniera akan 15 MAP Sensor Calibra O aaea ae aeaaaee aT aaar Aaaa aTa AA aai EE aaae aeaa aaiae iieu n 15 TPS CalibratiOn EEN 16 IAT Sensor Selection Ee e SCHEER eu EE EE EEN EE e 16 Ignition Mode Selection aaaaaaaaaaaaaaaaasaanannnnnunnnnnunnnnnunnnnnnnnnnnnnnnnnnnnnnnunnnnnnnnnnnnnnnnnunnnnnunnna 16 TT WEE 16 Input and Output Getup cececceeeeceeeee ence ence a naan ee RRRR KEE ERRR KEE ERR EEEE RRE EEE nnmnnn nnmnnn nnmnnn 17 Trigger Calibrationi v tient vk t a a YTN SN NN NE iii aa 17 First Time Startup 18 Fimall CHECKS E 18 Essential Tuning Adjustments aaaaaaaaaaaavannuannnnunnnnnunnnnnunnnnnunnnununnnununnnnnnnnnununnnnnunnnn 19 Pin Functions 21 c 2009 Link ElectroSystems Ltd Contents 5 1 Nissan AUCH TTT 21 Part IX Pinouts 22 1 Nissan AUCH TTT 22 Part X Known Issues 23 1 Nissan Skyline GIS GTR ucraini 23 Part XI Warranty Statement 24 c 2009 Link ElectroSystems Ltd 6 Plugin Installation Manual 1 Introduction Thank you for purchasing your Link Plug In Engine Control Unit ECU Link G4 ECUs are an advanced fully programmable microprocessor controlled Engine Management System Th
21. old Absolute Pressure MAP Sensor should always match the Barometric Absolute Pressure BAP Sensor As well as providing altitude correction the BAP sensor also allows the MAP sensor to be calibrated prior to tuning Link G4 ECUs use an on board barometric sensor that is calibrated prior to dispatch This ensures that all PCLink Tuning Software programs pcl Files give a consistent state of tune throughout the ECU range This allows a PCL file to be transferred between G4 based ECUs giving an equivalent state of tune providing all factors affecting volumetric efficiency are equal Without the ability to calibrate all the available tyoes of MAP Sensors to the BAP Sensor there would be significant affects on the accuracy of the resulting tune especially when tuning with Manifold Gauge Pressure MGP as a load index To calibrate the MAP sensor 1 Connect a laptop notebook PC to the ECU and connect to the ECU using PCLink 2 Under the Analog Channels menu select the An Volt channel that has been wired to the MAP sensor Select the correct MAP Sensor Type Under the Options menu select MAP sensor calibration Follow the on screen instructions Select the Analog Inputs tab in the runtime values section of PCLink lower part of the screen D oa A O Compare the MAP and BAP values and ensure they have a similar reading within 1 kPa c 2009 Link ElectroSystems Ltd 16 Plugin Installation Manual 7 Perform a S
22. read the USB tuning cable through the slot in the back of the case and plug it into the ECU You may need to unplug it from the ECUs top board to do this If using the internal MAP sensor recommended for all applications requiring less than 1 5 bar of boost run a length of vacuum hose into the enclosure and connect it to the MAP sensors pressure port It is recommended to use a hose clamp or small cable tie on this hose 5 Reassemble the enclosure and fit the ECU back to the vehicle 6 Connect the ECU to the factory wiring loom Carefully tighten the header bolt while pressing the sides of the connector into the ECU It is a common fault for this connector to bend in the middle and make poor connection Do NOT attempt to start the vehicle Proceed to read through the remaining sections of this manual first c 2009 Link ElectroSystems Ltd Additional Sensors ti 4 Additional Sensors G4 Plug In ECUs offer various options for the installation of additional sensors and devices As a minimum it is recommended that all ECUs are installed with a Manifold Absolute Pressure MAP sensor and Intake Air Temperature IAT sensor These parts can be purchased if required from your nearest Link dealer 4 1 MAP Sensor It is important that the pressure source for a MAP sensor be taken from a stable pressure source after the throttle body It is common to T into the fuel pressure regulators pressure signal Do NOT share this signal with oth
23. rform another trigger calibration known as setting the base timing 12 Perform a Store by pressing F4 7 1 Final Checks To avoid potential engine damage and wasted time the adjustments presented in the following sections must be made before attempting to start the engine For further help on any of the settings discussed below consult the online Help in the PCLink Tuning Software Online help can be invoked by pressing F1 or right clicking any item and selecting What s this Pre set up Checks Before attempting to configure the ECU ensure the following tasks have been completed 1 Ensure the ECU and all associated components are connected and correctly wired installed 2 Fully charge the vehicle s battery as the engine will be required to be cranked during the set up procedure c 2009 Link ElectroSystems Ltd First Time Startup 3 Check all oil and water levels are correct Connecting to PCLink Tuning Software Use the following procedure to establish a connection between your Link ECU and PC Link Tuning Software tuning software 1 Make sure your laptop battery is fully charged or plugged in to mains power 2 Connect the ECU to your laptop and connect to PCLink Tuning Software as described in the Communicating with your ECU section of this manual 7 2 Essential Tuning Adjustments It is assumed that at this stage all set up procedures described in previous sections have been completed and the
24. s Ltd Pre Start Configuration 15 6 Pre Start Configuration Before starting the vehicle important pre start configurations need to be made 6 1 Firmware Version It is recommended that the you Link G4 ECU is running the most up to date firmware Firmware version information can be obtained by connecting to the ECU with PCLink and selecting ECU Information under the Help menu The latest firmware can be downloaded from our website with PCLink It is recommended that this is performed by an experienced Link dealer as new features may need to be properly configured The firmware can be updated by selecting Update Firmware under the ECU Controls menu in PCLink Follow the on screen instructions to complete the firmware update process 6 2 Base Configuration All G4 Plug In ECUs are shipped with base configuration settings Note that these are provided to reduce initial setup and tuning times They are NOT recommended tuning values PCLink includes base configurations for various models Download the appropriate base configuration into your ECU with PCLink by connecting to the ECU described in the Connecting To PCLink section of this manual then selecting Open under the File menu Select the appropriate pcl file and then select Open Downloading large configuration files can take up to a few minutes Be patient and acknowledge any messages PCLink shows 6 3 MAP Sensor Calibration At key on and engine not running the Manif
25. s of trade usage Link ElectroSystems Ltd License Agreement The programme in this system is licensed not sold Link ElectroSystems Ltd Grants you a license for the programme only in the country where you acquired the programme You obtain no rights other than those granted under this license Under this license you may use the programme on only one machine at a time If you transfer the programme you must transfer a copy of this license and all other documentation Your license is then terminated You may terminate your license at any time Link ElectroSystems Ltd May terminate your license if you fail to comply with the terms and conditions of this license In either event you must destroy your copy of the programme c 2009 Link ElectroSystems Ltd
26. specting a compatibility issue 10 1 Nissan Skyline GTS GTR Current known issues with the Link G4 Nissan GTS GTR Plug In ECU e On some GTR and 4WD models a warning light may be displayed on the dash This may be due to the value of the ECUs TPS Out signal level being too low A solution to this is to slightly rotate the TPS to increase the closed throttle voltage Remember to do a TPS cal after moving the TPS e TPS idle Switch Powered From 5V This is NOT an issue on manual transmission models Some automatic transmission models reguire the TPS switch to be powered from 12V This can be achieved by removing the wire from pin 57 Idle Switch Power and joining it to the wire from pin 59 ECU Power e 5V Short There has been a report of situation where the 5V supply was dragged down due to a short on the 5V supply This was resolved by removing the wire from pin 57 e Back Feeding on R34 On R34 GTR models the A C relay is hot fed This will cause a back feed that will drain the battery The power supply to the A C relay must be changed to an ignition switched source or Aux 3 pin 9 disconnected from the ECU It is possible to use the power supply to the injector ballast resistors as the feed for the A C relays coil c 2009 Link ElectroSystems Ltd a Plugin Installation Manual 11 Warranty Statement Link ElectroSystems Ltd Warranty Statement Effective 5pm April 5th 1992 All products manufactured or distributed by L
27. tems that must be set up to make the ECU specific to your model The Pin Functions section of this manual gives a list of the functions of each channel based on the target vehicle It is the tuners responsibility to make sure that the following channels are set up correctly for the vehicle model the ECU is fitted to All Auxiliary Output Channels Use the Test On or Test PWM at 10 Hz functions to test the wiring of channels All Digital Inputs Look at the Digital Inputs runtime values lower section of the PCLink screen to confirm each channels operation All Analogue Volt and Temperature Inputs Look at the Analogue Inputs runtime values lower section of the PCLink screen to confirm each channels operation 6 8 Trigger Calibration The following instructions assume that all pre start set up instructions given in previous sections have been completed Only after all pre start checks have been made should an attempt be made to crank the engine The following steps must be performed before an attempt is made to start the engine to ensure the G4 ECU is calibrated to precisely measure engine position 1 Connect the ECU to PCLink 2 Select Fuel then Fuel Set up a Set Injection Mode to OFF This will prevent the engine from trying to start while the triggers are calibrated b Perform a Store press F4 to make sure fuelling is not re enabled if power to the ECU is lost 3 Click on Triggers then Calibrate Tr
28. tore by clicking on the S button top centre of screen or press F4 6 4 TPS Calibration The Throttle Position Sensor TPS is used by the ECU to calculate various engine management parameters used by functions such as idle speed control acceleration enrichment and motor sport features It is important that the ECU knows when the throttle is open and closed or part way in between The following procedure calibrates the ECU to match the TPS 1 Connect a laptop notebook PC to the ECU and connect to the ECU using PCLink Under the Analog Channels menu ensure that An Volt 3 is set to TPS Main Under the Options menu select TPS calibration Follow the on screen instructions Select the Analog Inputs tab in the runtime values section of PCLink lower part of the screen O 0 WwW N Ensure the Throttle Position value reads 0 when the throttle is closed and 100 when fully open 7 Perform a Store by clicking on the S button top centre of screen or press F4 6 5 IAT Sensor Selection This section only applies when an Intake Air Temperature IAT sensor has been wired and fitted to the intake system It is important that the ECU is calibrated to match the sensor installed in the engine This procedure is as simple as selecting the correct sensor type as follows 1 Connect a laptop notebook PC to the ECU and connect to the ECU using PCLink Click on Analogue Channel in the configuration tree Select the
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