Using SST, install the sensor to the exhaust manifold LH.

Remove the 11 clips and intake duct seal.

Disconnect the A/F sensor connector.

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE EMISSION CONTROL

Install the ventilation valve.

Install a clean hose to the ventilation valve.

Raise the V-bank cover to disengage the clip on the rear of the cover. Raise the cover again to disengage the 2 clips on the front of the cover and remove the cover.

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE EMISSION CONTROL

Install the VSV to the intake air connector.

Measure the resistance of the VSV.

• Standard resistance:

• Tester Connection	Specified Condition
  1 - 2	26 to 30 Ω at 20°C (68°F)
  1 - Body ground 2 - Body ground	10 MΩ or higher

If the result is not as specified, replace the VSV.