Vacuum Introduction - Toyota 2006 PRIUS Manual

26
d. Vacuum Introduction
1) While the leak detection pump is actuated, the ECM turns ON the vent valve in order to introduce
a vacuum into the canister.
2) When the pressure in the system stabilizes, the ECM measures and memorizes the pressure.
Atmosphere
Leak Detection Pump
Canister Pressure Sensor
Reference Orifice
ON (Open)
Purge VSV
OFF (Close)
ON
Vent Valve
OFF (Vent)
Leak Detection Pump
Atmospheric Pressure
System Pressure
0.02 in. Leak Pressure
NEW FEATURES - 1NZ-FXE ENGINE
Purge VSV
(OFF) ECM
Vent
Valve
(ON)
ON
OFF
VSV (For Purge Flow Switching Valve)
(OFF)

Vacuum Introduction

01REG07Y
01REG10Y