Installation and Wiring Guide
Introduction
Congratulations on your decision to install an Autronic engine management system to your
vehicle. Autronic systems have been successfully installed on many vehicles such as rally cars,
off road vehicles, street cars, powerboats, offshore powerboats, and in other forms of racing.
Autronic is designed to enable users to precisely control ignition timing and fuel-air mixture.
Precise ignition and mixture control also leads to excellent drivability and fuel economy -
something that is often lacking in high-performance carburettor engines.
This Installation and Wiring Guide Will guide you trough installation of you Autronic SM4 onto
you vehicle. This section accompanies the Setup Guide and Tuning Guide that you or your
tuner will need to refer to before completing you installation and configuration.
Before you Begin
1) READ THIS ENTIRE MANUAL BEFORE STARTING.
The greater your knowledge of the operation of the Autronic ECU, the easier you will find it to
understand what you are doing, and why.
2) Read any additional material accompanying this manual that updates the document since it
was written.
3) You may need special parts or additional tools or test equipment in order to complete
installation. Make sure you have these items on hand before you begin to avoid frustration.
Contact your Autronic dealer if you have difficulty.
4) Do not take any shortcuts. Mistakes in the early stages of installation can cause you major
headaches later on, be it in a few days or a few months time. Mistakes or shortcuts will cost you
money and frustration in finding and fixing unnecessary problems. You have the opportunity to
make your Autronic´s ECU operation extremely dependable and easy to use by doing it right the
first time.
5) Electromagnetic interference (EMI) from unsuppressed spark plugs and leads can cause the
ECU to fail.
6) In hot climates, or with turbocharged engines, you may need to employ heat shielding to
prevent soak and damage to electrical and fuel parts. Use the coolest surface of chassie as a
heat sink for components and use thermally conductive brackets where appropriate.
7) We recommend having your system tuned by professionals. An Autronic exhaust gas
analyser and fuel pressure meter make tuning vastly easier and help avoid potentially
disastrous lean out conditions that could destroy your engine.
Should you wish to tune this unit yourself, make sure you have some reliable means of
determining if your engine is running to lean. The only true way of determining this is using an
true Autronic analyser. Connecting a regular lambda sensor direct to the unit will not help the
tuning, it can only be used when running CLC on a fully tuned engine.
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