TESTING INFORMATION
Before testing separate components or systems, perform procedures in appropriate F - BASIC TESTING article. Since many computer-controlled and monitored components set a diagnostic trouble code if they malfunction, also perform procedures in appropriate G - 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 systems contain different components depending on application. (Схема №111)- (Схема №116). When testing EGR system and components, use proper illustration to determine component location.
Note. When performing EGR system test, it may be necessary to monitor engine RPM by using scan tool. Scan tool may be connected to DLC-3 for monitoring engine RPM. (Схема №84)- (Схема №92).