If your OBDII scan shows “not ready” for smog, completing a drive cycle might solve the issue. Here’s a potential drive cycle for a Toyota MR2 with a 2AZ-FE engine:
Toyota MR2 (2AZ-FE) Drive Cycle
This drive cycle aims to prepare your vehicle for a smog inspection by running all necessary emissions monitors. Follow these steps carefully:
Initial Idle and Highway Driving:
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Idle: Start the engine and let it idle for at least 10 minutes. This allows the engine to reach operating temperature.
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Highway Driving: Drive at a consistent speed between 43-56 mph for 3-5 minutes. Maintain engine speed between 900 and 3,200 RPM. This tests the catalytic converter efficiency.
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Idle: Stop and let the engine idle for another 3-5 minutes.
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Repeat: Repeat steps 2 and 3 once more.
Varying Speed Driving:
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Moderate Speed: Drive at 40-55 mph for 3 minutes.
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City Driving: Drive at 35-45 mph for 7 minutes. This simulates typical city driving conditions.
Fuel System Check:
- Engine Off and Fuel Cap Release: Stop the vehicle and turn off the engine. Remove and reinstall the fuel tank cap to release pressure, resetting the EVAP system.
Final Driving Sequence:
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Consistent Driving: Immediately after restarting the engine, drive at approximately 45 mph for 5 minutes.
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City Driving with Stops: Drive at approximately 25 mph for 15 minutes, incorporating at least two stops of about 30 seconds each.
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Idle: Stop and let the engine idle for 2 minutes.
RPM and Idle Check (Repeat 10 Times):
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RPM Check: Drive at 25 mph or more for at least 50 seconds, ensuring the engine speed stays above 900 RPM.
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Idle: Stop and let the engine idle for at least 40 seconds.
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Repeat: Repeat steps 11 and 12 ten times.
If Monitors Still Not Ready:
If the OBDII readiness monitors haven’t switched to “complete” after completing this cycle, ensure all preconditions are met (e.g., sufficient fuel level, no check engine light). Turn the ignition off and repeat the entire drive cycle from step A.
OBDII Scanner Recommendation:
An OBDII scanner can help check the readiness status of your vehicle’s emissions monitors. Autel offers a range of diagnostic tools that can provide this information.
This drive cycle information is intended as a guide. Consult your vehicle’s owner’s manual for the most accurate and up-to-date drive cycle procedure for your specific Toyota MR2 model year. Completing this drive cycle may help resolve your “OBDII not ready” smog issue.
