Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Smog Ventilation Sensor

Components

COMPONENTS

ILLUSTRATION

*1	COOL AIR INTAKE DUCT SEAL	*2	SMOG VENTILATION SENSOR
	N*m (kgf*cm, ft.*lbf): Specified torque	-	-

Removal

REMOVAL

PROCEDURE

1. REMOVE COOL AIR INTAKE DUCT SEAL

Click here

2. REMOVE SMOG VENTILATION SENSOR

(a) Disconnect the connector.

(b) Remove the bolt.

(c) Disengage the guide to remove the smog ventilation sensor.

Inspection

INSPECTION

PROCEDURE

1. INSPECT SMOG VENTILATION SENSOR (HC, CO)

(a) Connect a positive (+) lead from the battery to terminal 3 (IG) and a negative (-) lead to terminal 6 (E).

*a Component without harness connected (Smog Ventilation Sensor)

(b) Allow exhaust gas (HC, CO) to travel to the sensing portion of the smog ventilation sensor, and measure the resistance between terminals 1 (SG) and 2 (DGS).

OK:

When the sensor is exposed to exhaust gas, the resistance increases.

HINT:

The resistance of the sensor before being exposed to exhaust gas is 10 kΩ to 40 kΩ.

If the result is not as specified, replace the smog ventilation sensor.

2. INSPECT SMOG VENTILATION SENSOR (NOx)

(a) Connect a positive (+) lead from the battery to terminal 3 (IG) and a negative (-) lead to terminal 6 (E).

*a Component without harness connected (Smog Ventilation Sensor)

(b) Allow exhaust gas (NOx) to travel to the sensing portion of the smog ventilation sensor, and measure the resistance between terminals 1 (SG) and 4 (DGS1).

OK:

When the sensor is exposed to exhaust gas, the resistance increases.

HINT:

The resistance of the sensor before being exposed to exhaust gas is 10 kΩ to 40 kΩ.

If the result is not as specified, replace the smog ventilation sensor.

Installation

INSTALLATION

PROCEDURE

1. INSTALL SMOG VENTILATION SENSOR

(a) Engage the guide.

(b) Install the smog ventilation sensor with the bolt.

Torque:

9.8 N·m {100 kgf·cm, 87 in·lbf}

(c) Connect the connector.

2. INSTALL COOL AIR INTAKE DUCT SEAL

Click here