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ECU Diagnostics

ECU Diagnostics – part 3 : Test Setup

Ok, so we have an OBD port/connector on our cars that connects directly to the ECU. How are we going to figure out how to talk the right communications protocols to the car to get at its internal data? We need a test rig to do some experiments with. If you’re looking for a post […]

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ECU Diagnostics

ECU Diagnostics – part 2 : ECU, OBD and CAN

ECU Caterhams, like all modern cars, have an Engine Control Unit (ECU) – a black box full of electronics, controlled by a microprocessor that manages how the engine runs.  And because it has a microprocessor it means it runs some software to control everything. It also connects to a bunch of sensors, like temperature, pressure, […]

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ECU Diagnostics

ECU Diagnostics – part 1 : Introduction

So here we go for a marathon series of posts. I’ll update this page with links to the completed posts as they come along… Introduction ECUs, OBD and CAN Test Setup Wireshark Patching and OBD-II Results The Correlator Dead-End Reading Material ECU Maps and Mapping Easimap uses ISTOP (sort of) The Easimap Protocol Theory Decoding […]