Tools & Testing

Test and test methodology, results and result analyst.
In short, what to test, how to test it, and what tools are required to test it; and most importantly what do the results means. Do the test results mean that the circuit or sensor is correct or that the test method was invalid?

Advanced apology
Sections of this article are in danger of being preachy so apologies in advance, but having 20 years of personal experience of being pulled away from my own work to rectify prototype test vehicles that has been damaged by mechanical engineers working with electronic systems this is a touchy subject for me. Electronic systems are delicate precision things and in our opinion best approached in a gentle and sympathetic manner.
A  good approach to testing is to think about how to test a component, then rethink the test, to ensure not only will it give good results but is there more of the system that could be tested. For example, measuring a sensor has value, but the ECU does not taking readings directly from the sensor it reads the system (sensor +connectors +wiring) so taking a measurement at the ECU connector will measure the sensor system and test more than just the sensor. However, ECU connectors are not designed to be removed and reconnected numerous times and indeed some only have a guaranteed connection rate of 10 connections, one of which will be used up during the vehicle manufacturing process. So now we can understand a little of the complexity of testing; there is more value testing at the ECU connector but the test itself may cause system degradation. Tricky eh?

Test Tools                                                                                             Test Method and Sensors

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