Subaru WRX & STI V7-9 Installation Manual
Subaru WRX & STI V7-9Installation Manual
Product Warranty StatementLINK ENGINE MANAGEMENT LTD – LIMITED LIFETIME WARRANTYAll Engine Control Units (ECUs) manufactured or distributed by Link Engine Management Ltd aresubject to the following LIMITED LIFETIME WARRANTIES, and no others.Link Engine Management Ltd warrants only to the original purchaser of the ECU, for the lifetime ofthe ECU, (subject to the limitations set out below), that the ECU shall be free from defects ofmaterials and workmanship in the manufacturing process. This warranty ceases to apply and doesnot apply to ECUs that have not been manufactured or distributed by Link Engine Management Ltdfor a period of greater than one year.An ECU claimed to be defective must be returned to the place of purchase. Link Engine ManagementLtd, at its sole option, may replace the defective ECU with a comparable new ECU or repair thedefective ECU.This limited lifetime warranty is not transferable and does not apply to any ECU not properly installedor properly used by the purchaser or end user, or to any ECU damaged or impaired by externalforces. The above warranties are the full extent of the warranties available on the ECU. Link EngineManagement Ltd has no liability to the original purchaser or any other person for any loss, injury ordamage to persons or property resulting from the use of the ECU or any failure of or defect in theECU whether by general, special, direct, indirect, incidental, consequential, exemplary, punitive, orany other damages of any kind or nature whatsoever. Link Engine Management Ltd specificallydisclaims and disavows all other warranties, express or implied, including, without limitation, allwarranties of fitness for a particular purpose, warranties of description, warranties of merchantability,trade usage or warranties of trade usage.For off-road use only, not intended for highway vehicles. This ECU contains a user-configurablesoftware programme, which is updated by Link Engine Management Ltd from time to time. The usermust ensure the current correct version of this programme is downloaded from the website of LinkEngine Management Ltd and installed in the ECU prior to use. This limited lifetime warranty does notapply where the ECU has been installed with the incorrect version of the software programme. Theuser is solely responsible for the setup and testing of all user-configurable features.Link Engine Management Ltd License AgreementThe software programme in this ECU is licensed not sold. Link Engine Management Ltd grants theuser a license for the programme only in the country where the programme was acquired. No otherrights are granted under this license and the programme may only be used on one machine at atime. If the programme is transferred a copy of this license and all other documentation must betransferred at the same time. The license may be terminated by the user at any time. Link EngineManagement Ltd may terminate the licence if the user fails to comply with the terms and conditionsof this license. In either event the copy of the programme must be destroyed.
Contents5Table of ContentsPart I G4X Plug-In ECU Installation Manual61 Introduction. 6Safety Notice . 6Dis claim er. 6Suppor t Options. 62 Pre-Installation. 6Boar d Sw itch Settings. 7WRXLink (7-9). 7Injector Im pedance. 7Subaru Impreza.WRX V1-10 ECU73 Installation. 7ECU Handling Pr.ocedur es7Fitting the ECU. 8WRXLink (1-2),.WRXLink (3-4), WRXLink (5-6), WRXLink (7-9)84 Additional.Sensors/Functions8MAP Sens or . 9WRXLink (1-2),.WRXLink (3-4), WRXLink (5-6), WRXLink (7-9)9IAT Sens or. 9WRXLink (7-9). 9E-Thr ottle Output. 9WRXLink (7-9). 9Expans ion Connector. 105 PC Tuning. 10Ins talling USB.Dr iver s10Ins talling PCLink.Tuning Softw ar e10Com m unicating.With Your ECU106 Pre-Start.Configuration11Fir m w ar e Ver.s ion11Bas e Configur.ation11MAP Sens or Calibr.ation11TPS Calibr ation. 12IAT Sens or Selection. 12Input and Output.Setup12Tr igger Calibr.ation127 First Time.Startup13Final Check s . 13Initial Setup . 14Es s ential Tuning.Adjus tm ents168 Pinouts. 17WRXLink (7-9). 179 CAN Information. 19WRXLink (7-9). 1910 Know.n Issues20WRXLink (7-9). 20 2020 Link Engine Management Ltd
6Link ECU Online Manual1G4X Plug-In ECU Installation Manual1.1IntroductionThank you for purchasing your Link Plug-In Engine Control Unit (ECU), an advanced, fully programmablemicroprocessor controlled Engine Management System.G4X software employs high resolution fuel and ignition tables with configurable load and RPM centres. Whencoupled with up to six dimensional fuel and ignition mapping, barometric pressure compensation and intakeair temperature correction this gives an unprecedented level of tuning accuracy. All Link G4X ECUs are in-fieldupgradeable, there is no need to return the unit for software updates.All Link G4X Plug-In Engine Management Systems are designed with flexibility and ease of installation inmind. Link Plug-In systems are designed to replace the circuit board inside the factory ECU enclosure. Thisprovides an invisible install that requires minimal modification to vehicle wiring and ECU mounting.Installing and tuning any after market engine management system is not to be taken lightly. G4X ECUs givethe tuner the control & flexibility that only top after-market engine management systems in the world canprovide. While every effort has been made to keep G4X ECUs as user friendly as possible, it should berecognised 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 G4X ECU. While it is not strictly essential that this work isperformed by an automotive electrician, the knowledge and tools available to these professionals makes ithighly recommended. Regardless of who does the installation, it is of utmost importance that instructionsprovided in this manual are followed exactly throughout the installation.2. Once the G4X ECU has been installed it will need to be tuned using a laptop computer with PCLinksoftware. Information on the configuration and tuning of the G4X ECU is detailed in the help section ofPCLink. G4X ECUs are shipped pre-loaded with a base configuration that should be close enough to getmost engines running after a few application specific adjustments have been made. While hearing theengine running on the new ECU for the first time is always a satisfying feeling, it is important to realisethat the job is not complete. The amount of tuning performed and the experience of the tuner are the twomost important factors in determining how happy you will be with your engine management system.1.1.1Safety NoticeYour Link Plug-In ECU is designed to enhance the performance of your vehicle. However in all cases, yourvehicle must be operated in a safe manner. Do not tune your vehicle while operating it on public roads.WARNING!Failure to follow all installation and operating instructions may result in damage tothe Link ECU, personal injury, or harm to property.1.1.2DisclaimerAll care has been taken to ensure the pin outs and interconnections of the ECU to the vehicles wiring harnessare correct. However due to variations between vehicle models it is the installers responsibility to check wiringconnections BEFORE installing the ECU. Link will not be held responsible for any damage caused by theincorrect installation of this product.1.1.3Support OptionsShould any issues arise during installation, the following options exist for technical support:1. PCLink help, press F1 while running PCLink2. Contact your nearest Link dealer. A Link dealer list is available on our website.3. Link website: www.linkecu.com with Online Discussion Forum.4. Technical Support Email: tech@linkecu.comThe majority of questions received by the technical support team are clearly answered in the manuals. Pleaseconsult the manuals to make sure that your question has not already been answered.1.2Pre-InstallationBefore installing the Link G4X ECU into the vehicle some pre-installation checks must be performed. 2020 Link Engine Management Ltd
G4X Plug-In ECU Installation Manual1.2.17Board Switch SettingsSome Link G4X ECUs require switches on the board to be set before installation.1.2.1.1WRXLink (7-9)There is one significant wiring difference between WRX and STI models. Four jumpers are fitted to the ECUsbottom board to allow configuration.Fit the jumpers according to the diagram below. DO NOT fit the jumpers in any combination other than thetwo shown.Depending on the country the vehicle was destined for the labelling of these jumpers (WRX and STi) may beincorrect. It may be necessary to try both options to determine which one is correct. If your vehicle is an STiand the ECU powers up with jumpers in the WRX position don't be alarmed.If jumpers are in the wrong position, the ECU will not power up.1.2.2Injector ImpedanceInjector impedance is important and needs consideration before installing the ECU.1.2.2.1Subaru Impreza WRX V1-10 ECUThe G4X Subaru V1-10 Plug-In ECUs are NOT designed to be used directly with low impedance injectors.All models this ECU is designed for are fitted with high impedance injectors from factory. This ECU has beendesigned to be used with HIGH impedance (greater than 6 Ohms) injectors. Ballast resistors must be wired iflow impedance injectors are to be used. This means that the ECU is plug-in compatible with factory fittedinjector combinations on all models, however if fitting low impedance injectors then ballast resistors must bewired. Contact your nearest Link dealer to purchase a ballast resistor pack if required.1.3InstallationThis guide provides information on correctly and safely installing your new Link G4X Plug-In ECU.1.3.1ECU Handling ProceduresWARNING!!!The following installation process will require handling of both the Link ECU andfactory ECU. Both of these are highly sensitive to electrostatic discharge and areeasily damaged. Follow the anti-static precautions given in this manual carefullyto avoid damaging electronic components. Warranty claims for ECUs damaged byelectrostatic discharge will NOT be accepted. 2020 Link Engine Management Ltd
8Link ECU Online ManualANTI-STATIC HANDLING GUIDELINESYour body builds up an electrical charge as you move around. This charge can reach very highvoltages. Whenever given the opportunity this energy will attempt to discharge (usually throughyour finger tips!). This can be fatal to most electronic components. Most people haveexperienced an electrostatic discharge when they step out of their car or touch a metal benchtop.1. The following guidelines describe precautions that can be taken to reduce the possibility ofdamaging 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 thatfailure due to static damage often does not appear until well after it was caused.1.3.2Fitting the ECUInformation is provided to assist in fitting the ECU into the vehicle.1.3.2.1WRXLink (1-2), WRXLink (3-4), WRXLink (5-6), WRXLink (7-9)The following steps outline the installation procedure for Subaru Plug-In ECUs:1. Remove the factory ECU from the vehicle: Ensure the key is in the OFF position. The factory ECU islocated under a steel cover on the passengers side floor (below the passengers feet). Lift the carpet,remove the cover panel. Unplug the wiring harness from the factory ECU. Remove the 6mm bolts (10mmsocket) that retain the ECU and remove the ECU from the vehicle. DO NOT touch the exposed pins in thefactory ECU connector.2. Remove the factory ECUs circuit board from its enclosure: Ensure you are following the given anti-staticguidelines and ARE WEARING A CONDUCTIVE WRIST STRAP connected to a conductive workingsurface. Remove the top and cover from the ECU enclosure by removing the side retaining screws.Remove the circuit board by removing the retaining screws. Hold it only by the plastic header and place itaside.3. Fit the Link Plug-In ECU: Remove the ECU from its packaging and place it immediately in the factoryenclosure. Place the factory ECU in the packaging your Link ECU came in for its protection.4. If the ECUs USB tuning cable is to be left permanently connected, a slot will need to be cut in the topcover. The best place to do this is usually beside the factory header.5. Reassemble the enclosure and fit the ECU back to the vehicle.6. Connect the ECU to the factory wiring loom.7. Do NOT attempt to start the vehicle. Proceed to read through the remaining sections of this manual first.1.4Additional Sensors/FunctionsG4X Plug-In ECUs offer various options for the installation of additional sensors and devices. As a minimum itis recommended that all ECUs are installed with a Manifold Absolute Pressure (MAP) sensor and Intake AirTemperature (IAT) sensor. These parts can be purchased if required from your nearest Link dealer. 2020 Link Engine Management Ltd
G4X Plug-In ECU Installation Manual1.4.19MAP SensorIt is important that the pressure source for a MAP sensor be taken from a stable pressure source after thethrottle body. It is common to 'T' into the fuel pressure regulators pressure signal. Do NOT share this signalwith other devices such as boost gauge
1.2.2.1 Subaru Impreza WRX V1-10 ECU The G4X Subaru V1-10 Plug-In ECUs are NOT designed to be used directly with low impedance injectors. All models this ECU is designed for are fitted with high impedance injectors from factory. This ECU has been designed to be used with HIGH impedance (greater than 6 Ohms) injectors. Ballast resistors must be .
2003 Subaru Impreza WRX STI (Silver) 2004 Subaru STI (Blue) 2002 Subaru Impreza 2.5RS (Blue Ridge Pearl) 1991 Mitsubishi Galant VR-4 (White) 2002 Subaru WRX (Candy Cane) 1993 Subaru Impreza (Aqua Frost) 2004 Subaru STI (Silver) DRIVER Paul Malko Dave Vallie
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