Toyota RAV4 manuals

Toyota Sienna Service Manual: Air-fuel ratio (a/f) and heated oxygen (ho2) sensor heater monitors (front a/f and rear ho2 sensor type)

Toyota Sienna Service Manual / Engine / 2Gr-fe engine control system / Sfi system / Readiness monitor drive pattern / Air-fuel ratio (a/f) and heated oxygen (ho2) sensor heater monitors (front a/f and rear ho2 sensor type)

Air-fuel ratio (a/f) and heated oxygen (ho2) sensor heater monitors (front a/f and rear ho2 sensor type)

(a) Preconditions

The monitor will not run unless:

(b) Drive Pattern

(1) Connect an intelligent tester to the DLC3.

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

(3) Clear the DTCs.

(4) Start the engine.

(5) Allow the engine to idle for 10 minutes or more.

(6) Drive the vehicle at 25 mph (40 km/h) or more for at least 2 minutes.

(c) Monitor Status

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

If the status does not switch to COMPL (complete), make sure that the preconditions have been met, and repeat the Drive Pattern.

A/F sensor and ho2s monitors
(a) Preconditions The monitor will not run unless: 2 minutes or more have elapsed since the engine was started. The Engine Coolant Temperature (ECT) is 75°C (167°F) or more. Cumulative ...

Problem symptoms table
HINT: When a malfunction is not confirmed by a DTC (Diagnostic Trouble Code) check and the cause of problem cannot be identified through a basic inspection, troubleshoot according to the priority ...

Other materials:

Starting the engine
Check that the parking brake is set. Check that the shift lever is set in P. Firmly depress the brake pedal. The engine switch indicator will turn green. If the indicator does not turn green, the engine cannot be started. Press the engine switch. The engine will crank until it sta ...

No. 1 Clearance Warning Buzzer Circuit
DESCRIPTION The clearance warning ECU receives the ultrasonic sensor signal to sound the front warning buzzer. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT FRONT BUZZER Remove the clearance warning ECU with front buzzer.  Apply the battery voltage to the terminals 1 and 2 o ...

Enter test mode
HINT: Operation of the tire pressure warning reset switch can be checked in TEST MODE. During TEST MODE, the system is not initialized by pushing the tire pressure warning reset switch. The circuit of the tire pressure warning reset switch can be inspected during this mode. (a) Make ...

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