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EMISSION CONTROL TSB Revision ENGINE AND EMISSION CONTROL 17-103 INSPECTION M1173004600076 ORVR VENT VALVE MODULE CHECK 1. Blow air through over vent valve module nipple (A). Check that the air flows out of nipple (B) and nipple (C). 2. Connect a hand vacuum pump to nipple (A) of the over vent valve module. 3. With air flow through nipple (C) obstructed, apply a vacuum and check that the vacuum is maintained. AC001912AB A B C EVAPORATIVE EMISSION AIR FILTER VENT VALVE AC001913AB A C |