Toyota Sienna Service Manual: On-vehicle inspection

Toyota Sienna Service Manual / Engine / 2Gr-fe emission control / Air fuel ratio sensor (for 4wd) / On-vehicle inspection

HINT: The type of ignition switch on this model differs according to the specifications of the vehicle. For the expressions used in this section, refer to the "EXPRESSIONS OF IGNITION SWITCH" precaution (See page ES-1).

1. CHECK AIR FUEL RATIO COMPENSATION SYSTEM

(a) Connect the intelligent tester to the DLC3.

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

(d) Warm up the A/F sensor with the engine speed at 2500 rpm for approximately 2 minutes.

(e) Keep the engine speed at 2500 rpm and confirm that the "A/FS B1 S1" and "A/FS BS S1" display is as shown in the illustration.

CHECK AIR FUEL RATIO COMPENSATION SYSTEM

HINT:

The illustration may slightly differ from the display on the intelligent tester.
Only the intelligent tester displays the waveform of the A/F sensor.
On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL
The A/F CONTROL operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%
The sensors react in accordance with increases and decreases in the fuel injection volume.

Standard

NOTICE: The A/F sensor has an output delay of a few seconds.

(f) Confirm that the "O2S B1 S2" and "A/FS BS S1" display changes between 0 to 1 V with the engine speed at 2500 rpm.

OK: The voltage output oscillates more than 8 times in 10 seconds.

NOTICE:

Perform the check immediately after warming the engine up.
If the voltage variation could not be verified, warm up the A/F sensor again. If it could not be verified even after warming up the sensor again, check for DTCs (See page ES-39).

Air fuel ratio sensor (for 4wd)

Components ...

Removal

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Other materials:

Registration
1. DESCRIPTION OF CODE REGISTRATION HINT: The key has 2 codes: The key code (immobiliser code) and the wireless code. Both of these codes need to be registered. Refer to page for the wireless code registration procedures. When adding master keys or sub keys (Additional registration) ...

Adjustment procedure
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When stopping the engine with the shift lever in a position other than P
If the engine is stopped with the shift lever in a position other than P, the engine switch will not be turned off but instead be turned to ACCESSORY mode. Perform the following procedure to turn the switch off: Check that the parking brake is set. Shift the shift lever to P. Check that t ...