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Toyota Sienna Service Manual: Catalyst monitor (active air-fuel ratio control type)

Toyota Sienna Service Manual / Engine / 2Gr-fe engine control system / Sfi system / Readiness monitor drive pattern / Catalyst monitor (active air-fuel ratio control type)

Catalyst monitor (active air-fuel ratio control type)

(a) Preconditions

The monitor will not run unless:

(b) Drive Pattern

(1) Connect an intelligent tester.

(2) Turn the ignition switch to the ON position.

(3) Turn the tester or scan tool ON.

(4) Clear the DTCs.

(5) Start the engine and warm it up.

(6) Drive the vehicle at between 40 mph and 70 mph (64 km/h and 113 km/h) for at least 10 minutes.

(c) Monitor Status

(1) Check the Readiness Monitor status displayed on the tester.

(2) If the status does not switch to COMPL (complete), extend the driving time.

Purpose of readiness tests
The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emissionrelated components, and indicate any detected abnormalities with DTCs (Diagnostic Trouble Codes). ...

Evap monitor (key-off type)
(a) Preconditions The monitor will not run unless: The fuel tank is less than 90% full. The altitude is less than 8000 ft (2450 m). The vehicle is stationary. The engine coolant temperature ...

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