Agilent: Automotive Electronic Functional Test Using Agilent System Components

There are many types of electronic modules in automobiles today and new ones are springing up rapidly. In many cases, low frequency modules (i.e., ones without RF capabilities) can all be tested using a single system component architecture. This application note describes how best to use Agilent System Components to create a re-usable system tuned for low frequency automotive electronic functional test. Of the many electronic modules found in cars, here are a few of the most common: Powertrain - engine control, transmission control; Body - lights, chimes, door locks, windows, windshield wipers; Anti-lock Brakes (ABS); and Airbag. Table 1 lists some of the most important characteristics of these modules. Note that the number of pins that must be exercised during test is relatively small compared to data acquisition applications-fewer than 300. Power requirements are similar too. For ABS, Variable Reluctance Sensors or other isolated AC voltages must be generated. These signals are low frequency, just like the Cam/Crank/TDC/Knock signals required by engine/ powertrain control modules. Body and ABS modules can require the driving of some high current loads, while Engine Control Modules need to handle high flyback voltages.