Toyota Sequoia Limited

2001 ENGINE PERFORMANCE Theory & Operation

Vacuum Sensor For Hydrocarbon Adsorber Catalyst System (Prius)

Vacuum sensor provides input signal to Engine Control Module (ECM). ECM uses input signal for controlling the Hydrocarbon Adsorber Catalyst (HCAC) system. For additional information on HCAC system, see HYDROCARBON ADSORBER CATALYST SYSTEM under EMISSION SYSTEMS & SUB-SYSTEMS. Vacuum sensor is located at passenger's side front corner of the engine. See Fig. 46 .

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