Toyota RAV4 manuals

Toyota RAV4 Service Manual: Air fuel ratio sensor

Components

Toyota RAV4. Air fuel ratio sensor


On-vehicle inspection

  1. Check air fuel ratio compensation system

Toyota RAV4. Check air fuel ratio compensation system


  1. Connect the intelligent tester to the dlc3.
  2. Turn the ignition switch on.
  3. Select the following menu items: data list / a/fs b1 s1 and o2s b1 s2.
  4. Warm up the a/f sensor with the engine speed at 2,500 rpm for approximately 2 minutes.
  5. 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:

  1. Confirm that the display of "o2s b1 s2" changes between 0 to 1 v with the engine speed at 2,500 rpm.

Toyota RAV4. Check air fuel ratio compensation system


Ok: the voltage output oscillates more than 8 times in 10 seconds.

Notice:

Removal

  1. 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.

  1. Remove air fuel ratio sensor (for bank 1 sensor 1)

  1. Disconnect the sensor connector.
  2. Using sst, remove the sensor from the exhaust manifold.

Sst 09224-00010

Toyota RAV4. Remove air fuel ratio sensor (for bank 1 sensor 1)


Inspection

  1. Inspect air fuel ratio sensor (for bank 1 sensor 1)

Toyota RAV4. Inspect air fuel ratio sensor (for bank 1 sensor 1)


  1. Measure the resistance of the sensor.

Standard resistance


If the resistance is not as specified, replace the sensor.

Installation

Toyota RAV4. Install air fuel ratio sensor (for bank 1 sensor 1)


  1. Install air fuel ratio sensor (for bank 1 sensor 1)

  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:

  1. Connect the sensor connector.
  1. Connect cable to negative battery terminal

  2. Check for exhaust gas leaks

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