Toyota Celica 2005, Repair Manual

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DI − 504
− DIAGNOSTICS ENGINE (2ZZ − GE)
2005 CELICA (RM1131U)
TYPICAL ENABLING CONDITIONS
Item
Criteria
Minimum Maximum
The monitor will run whenever these
DTCs are not present
See page DI − 295
The same as that for DTC P0442
TYPICAL MALFUNCTION THRESHOLDS
P0441
Detection Criteria Threshold
Either the following conditions is met: A or B
A. Following conditions are met: (a) and (b)
(a) Fuel tank pressure at the vacuum introduction start − 1.6 kPa ( − 12 mmHg, − 0.47 in.Hg) or more
(b) Difference between the fuel tank pressure at the vacuum
introduction start and completion
Less than 0.9 kPa (7 mmHg, 0.27 in.Hg)
B. Following conditions are met for 14 sec.: (a) and (b)
A. Difference between ”minimum” fuel tank pressure before
the leak check and fuel tank pressure at 14 sec. after the
leak check
0.46 kPa or more (3.5 mmHg, 0.14 in.Hg)
(b) Fuel tank pressure 14 sec. after the leak check Less than − 3.7 kPa ( − 28 mmHg, − 1.1 in.Hg)
P0446
Detection Criteria Threshold
Case 1: CCV stuck closed
Fuel tank pressure when the CCV is opened after an EVAP
leak check
Not changing
Case 2: Pressure switching valve malfunction
Fuel tank pressure when the pressure switching valve is
closed after an EVAP leak check
Not changing
Case 3: EVAP VSV stuck closed
Fuel tank pressure after the EVAP VSV is opened and man-
ifold vacuum is introduced to the fuel tank
Not changing
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