EC-18 EMISSION CONTROL SYSTEMS — Exhaust Gas Recirculation (EGR) System (7M-GTE) Engine Stopped Air Open E27668 Engine at 2,500 rpm Air Closed E27669 Air E Air Filter Battery F11838 Air E G Battery B18255 No continuity Ω F11615 INSPECTION OF EGR VACUUM MODULATOR CHECK EGR VACUUM MODULATOR OPERATION (a) Disconnect the vacuum hoses from the EGR vacuum modulator. (b) Block port P with your finger. (c) Blow air into the other pipe. Check that the air pass- es through to the air filter freely. (d) Start the engine and maintain speed at 2,500 rpm. (e) Repeat the above test. Check that there is a strong resistance to air flow. If a problem is found, replace the EGR vacuum modulator. (f) Reconnect the vacuum hoses to the proper location. INSPECTION OF VSV 1. CHECK VACUUM CIRCUIT CONTINUITY IN VSV BY BLOWING AIR INTO PIPE (a) Connect the VSV terminals to the battery terminals as illustrated. (b) Blow into pipe E and check that air comes out of the air filter. (c) Disconnect the battery. (d) Blow into pipe E and check that air comes out of pipe G. If a problem is found, replace the VSV. 2. CHECK FOR SHORT CIRCUIT Using an ohmmeter, check that there is no continuity be- tween the terminals and the VSV body. If there is continuity, replace the VSV.