EMISSION CONTROL SYSTEMS — Exhaust Gas Recirculation (EGR) System (7M-GTE) EC-17 INSPECTION OF EGR SYSTEM 1. CHECK AND CLEAN FILTERS IN EGR VACUUM MODULATOR (a) Check the filter for contamination or damage. (b) Using compressed air, clean the filter. 2. PREPARATION Using a 3-way connector, connect a vacuum gauge to the hose between the EGR valve and EGR vacuum modulator. 3. CHECK SEATING OF EGR VALVE Start the engine and check that the engine starts and runs at idle. 4. CHECK VSV WITH COLD ENGINE (a) The coolant temperature should be below 57°C (135°F). (b) Check that the vacuum gauge indication is zero at 2,500 rpm. 5. CHECK VSV AND EGR VACUUM MODULATOR WITH HOT ENGINE (a) Warm up the engine. (b) Check that the vacuum gauge indication is approx. 70 mmHg (2.76 in.Hg, 9.33 kPa) at 2,500 rpm. (c) Disconnect the vacuum gauge and reconnect the vacuum hose to the proper location. 6. CHECK EGR VALVE (a) Apply vacuum directly to the EGR valve with the engine idling. (b) Check that the engine runs rough or dies. (c) Reconnect the vacuum hoses to the proper location. IF NO PROBLEM IS FOUND WITH THIS INSPECTION, THE SYSTEM IS OKAY; OTHERWISE INSPECT EACH PART