Toyota RAV4 Service Manual: Air fuel ratio sensor
Components

On-vehicle inspection
- Check air fuel ratio compensation system

- Connect the intelligent tester to the dlc3.
- Turn the ignition switch on.
- Select the following menu items: data list / a/fs b1
s1 and o2s b1 s2.
- Warm up the a/f sensor with the engine speed at
2,500 rpm for approximately 2 minutes.
- Keep the engine speed at 2,500 rpm and confirm
that the display of "a/fs b1 s1" is as shown in the
illustration.
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.
- Confirm that the display of "o2s b1 s2" changes
between 0 to 1 v with the engine speed at 2,500
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-292).
Removal
- Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
- Remove air fuel ratio sensor (for bank 1 sensor 1)
- Disconnect the sensor connector.
- Using sst, remove the sensor from the exhaust
manifold.
Sst 09224-00010

Inspection
- Inspect air fuel ratio sensor (for bank 1 sensor 1)

- Measure the resistance of the sensor.
Standard resistance 
If the resistance is not as specified, replace the
sensor.
Installation

- Install air fuel ratio sensor (for bank 1 sensor 1)
- Using sst, install the sensor to the exhaust
manifold.
Sst 09224-00010
Torque: 40 n*m (408 kgf*cm, 30 ft.*Lbf) for use
with sst
44 N*m (449 kgf*cm, 32 ft.*Lbf) for use
without sst
Hint:
- Use a torque wrench with a fulcrum length of 30
cm (11.81 In.).
- Make sure sst and wrench are connected in a
straight line.
- Connect the sensor connector.
- Connect cable to negative battery
terminal
- Check for exhaust gas leaks
Components
Removal
Remove no. 1 Engine cover (see page em-22)
Remove ventilation valve sub-assembly
Disconnect the ventilation hose from the ventilation
valve.
Using a ...
Components
Removal
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent ai ...
Other materials:
Downhill assist control operation switch (test mode dtc)
Description
The downhill assist control switch is connected to the skid control ecu in
the abs and traction
actuator.
Dtc c1379/74 can be detected when the downhill assist control switch sends the
downhill assist control
switch signal or test mode ends. Dtc c1379/74 is output only in t ...
Installation
Install no. 2 Radiator grille lower
Install the radiator grille and attach the 16 claws.
Install no. 1 Radiator grille lower
Install the radiator grille and attach the 16 claws.
Install radiator grille
Install the radiator grille with the 6 claws.
...
Shift lock system
Parts location
System diagram
On-vehicle inspection
Check shift lock operation
Move the shift lever to p.
Turn the ignition switch off.
Check that the shift lever cannot be moved to any
position other than p.
Turn the ignition switch on, depress the brake
pedal and chec ...