Toyota Sienna Service Manual: On-vehicle inspection

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

Components ...

Removal

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 2. REMOVE AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1) (a) Disconnect the sensor connector. (b) Using SST, remove the sensor from the exhau ...

Other materials:

Removal
NOTICE: Always wear safety gloves because the edges of the seatback frame and seat adjuster are sharp and may cause injury. Work must be started more than 90 seconds after the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected ...

Reverse Signal Circuit
DESCRIPTION The radio and navigation assembly receives a reverse signal from the park/neutral position switch. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT RADIO AND NAVIGATION ASSEMBLY Disconnect the radio and navigation assembly connector R12. Measure the voltage accor ...

How to proceed with troubleshooting
HINT: Use this procedure to troubleshoot the front power seat control system. The intelligent tester should be used in steps 3 and 5. 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER PROBLEM ANALYSIS CHECK AND PROBLEM SYMPTOM CHECK 3 CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNI ...