ENGINE - 1NZ-FE ENGINE
00REG25Y
D13N22
Atmosphere
Purge VSV
(OFF)
ECM
Canister Pump Module
Vent Valve
(OFF)
M
Leak Detection Pump
& Pump Motor
P
Canister
Pressure Sensor
ON (Open)
OFF (Close)
Purge VSV
ON
OFF (Vent)
Vent Valve
Pump Motor
ON
OFF
Atmospheric Pressure
System Pressure
Atmospheric Pressure Measurement
EG-52
b. Atmospheric Pressure Measurement
1) When the ignition switch is turned OFF, the purge VSV and vent valve are turned OFF. Therefore,
the atmospheric pressure is introduced into the canister.
2) The ECM measures the atmospheric pressure through the signals provided by the canister pressure
sensor.
3) If the measurement value is out of standards, the ECM actuates the leak detection pump in order to
monitor the changes in the pressure.
Summary of Contents for 1NZ-FE
Page 59: ...EG 60 MEMO ...