Toyota Celica 2005 Repair Manual page 745

DI−546
Fig. 1
CCV
(7)
DTC No.
Vapor pressure sensor output extremely changes under condi-
tions of (a) and (b): (2 trip detection logic)
(a) Vehicle speed: 0 km/h (0mph), Engine speed: Idling and
P0451
pressure switching valve is OFF
(b) Vapor pressure sensor value y opening pressure valve of
charcoal canister
P0452 Open in vapor pressure sensor circuit
P0453 Short in vapor pressure sensor circuit
2005 CELICA (RM1131U)
DIAGNOSTICS
(6)
EVAP
VSV
(5)
(8)
Charcoal Canister
DTC Detecting Condition
− ENGINE (2ZZ−GE)
ECM
Pressure
Switching
(4)
Valve
(3)
S Open or short in vapor pressure sensor circuit
S Vapor pressure sensor
S ECM
744
Vapor Pressure
Sensor
Fuel Tank Over
Fill Check Valve
(1)
(10)
(2)
(11)
(9)
Fuel Tank
Trouble Area
A21577