G4 Wiring and Installation Manual4
© 2009 Link
1 Introduction
Thank you for purchasing your Link Wire-In Engine Control Unit (ECU). Link G4 ECU's are
an advanced, fully programmable microprocessor controlled Engine Management System.
The 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. Coupled with up five dimensional fuel and ignition
mapping, barometric pressure compensation and intake air temperature correction this gives
an unprecedented level of tuning accuracy. G4 ECU's are in field upgradeable, no need to
return the ECU for software updates.
All Link G4 Wire-In Engine Management Systems are designed with flexibility and ease of
installation in mind. LinkWire-In systems are deigned to be wired to either existing wiring or
preferably as a complete re-wire. In some cases adapter looms or header boards can be
purchased to allow wiring of the G4 ECU to factory ECU headers. Contact your nearest Link
dealer for more information on these.
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 ECU's give the tuner the control & flexibility that only top after-market engine
management systems in the world can provide. While every effort has been made to keep
G4 ECU's as user friendly as possible, it should be recognised that added features bring
added complexity.
The complete set-up of your ECU can be divided into two equally important tasks.
1. This manual covers the wiring and 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 clean and robust connections are
made throughout the installation. A significant majority of after market engine
management failures are due to poor wiring practices. Note that use of complex features
such as Variable Valve Timing, Electronic Throttle Control and ECU Hold Power require
advanced wiring practice.
2. Once the G4 ECU has been installed it will need to be tuned using a laptop computer
with PCLink Tuning Software software. Information on the configuration and tuning of
the G4 ECU is detailed in the online help section of PCLink Tuning Software. G4 ECU's
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 Support Options
Should any issues arise during installation, the following options exist for technical support:
1. Contact your nearest Link dealer. A Link dealer list is available on our website: www.
LinkECU.com
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