TESTING INFORMATION
Before testing separate components or systems, perform procedures in appropriate BASIC TESTING article. Since many computer-controlled and monitored components set a diagnostic trouble code if they malfunction, also perform procedures in appropriate TESTS W/CODES article.
Note. Testing individual components does not isolate short or open circuits. Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate shorted or open wiring harness.
EXHAUST GAS RECIRCULATION (EGR) SYSTEM TEST
Note. EGR system is used on Avalon, Camry, Tacoma 2WD all models & 4WD regular cab, and T100 2WD 1/2 ton models. EGR system contains different components depending on application. (Схема №91)-96. When testing EGR system and components, use illustration to determine component location.