Toyota Celica 2005 Repair Manual page 528

(a) Preconditions
The monitor will not run unless:
MIL is OFF
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Fuel level is approximately 1/2 to 3/4
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Altitude is 7,800 feet (2,400 m) or less
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Engine Coolant Temperature (ECT) is between 4.4°C and 35°C (40°F and 95°F)
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Intake Air Temperature (IAT) is between 4.4°C and 35°C (40°F and 95°F)
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Cold Soak Procedure has been completed
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Before starting the engine, the difference between ECT and IAT must be less than 7°C (13°F)
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HINT:
Examples:
Scenario 1
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ECT = 24°C (75°F)
IAT = 16°C (60°F)
Difference between ECT and IAT is 8°C (15°F)
→ The monitor will not run because difference between ECT and IAT is higher than 7°C (13°F)
Scenario 2
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ECT = 21°C (70°F)
IAT = 20°C (68°F)
Difference between ECT and IAT is 1°C (2°F)
→ The monitor will run because difference between ECT and IAT is less than 7°C (13°F)
The readiness test can be completed in cold ambient conditions (less than 40°F / 4.4°C) and/or at
high altitudes (more than 7,800 feet / 2,400 m) if the drive pattern is repeated a second time after cycl-
ing the ignition off.
(b) Drive Pattern
(1) Connect the OBDII scan tool to DLC3 to check monitor status and preconditions (refer to (a)).
(2) Release pressure in fuel tank by removing the fuel tank cap and then reinstall it.
(3) Start the engine and allow it to idle until ECT becomes 75°C (167°F) or higher.
(4) Run the engine at 3,000 rpm for approximately 10 seconds.
(5) Allow the engine to idle with the A/C ON (to create slight load) for 15 to 50 minutes.
NOTICE:
If the vehicle not equipped with A/C, put a slight load on the engine by doing the following :
Securely set the parking brake.
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Block the drive wheels with wheel chocks.
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Allow the vehicle to idle in drive for 15 to 50 minutes.
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2005 CELICA (RM1131U)
DIAGNOSTICS − ENGINE (2ZZ−GE)
527
DI−329