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ENGINE AND EMISSION CONTROL – Emission Control System 17-3 VACUUM CIRCUIT DIAGRAM To Intake manifold Throttle body From air EGR control Vacuum hose colour R: Red Canister M EVAPORATIVE EMISSION CONTROL PURGE CONTROL SYSTEM CHECK 1. Disconnect the vacuum hose (black) from the intake 2. Plug the nipple from which the vacuum hose was removed. 3. When the engine is cold or hot, apply a vacuum of 53 C or less) Engine condition Normal condition At idle Vacuum is maintained 3,000 r/min When engine is hot C or higher) Engine condition Normal condition At idle Within 4 minutes Vacuum is maintained 3,000 r/min Within 3 minutes Vacuum will leak. Plug Vacuum |