Duct Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT DUCT TEMPERATURE SENSOR

Remove the air duct sensor.

Measure the resistance according to the value(s) in the table below.

Standard resistance

DUCT TEMPERATURE SENSOR - TESTER CONNECTOR SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	at 10°C (50°F)	9.4 to 10.5 kΩ
1 - 2	at 15°C (59°F)	7.5 to 8.3 kΩ
1 - 2	at 20°C (68°F)	6.0 to 6.5 kΩ
1 - 2	at 25°C (77°F)	4.5 to 5.2 kΩ
1 - 2	at 30°C (86°F)	3.8 to 4.2 kΩ
1 - 2	at 35°C (95°F)	3.1 to 3.4 kΩ
1 - 2	at 40°C (104°F)	2 5 to 2.8 kΩ
1 - 2	at 45°C (113°F)	2.0 to 2 3 kΩ
1 - 2	at 50°C (122°F)	1.6 to 2.0 kΩ
1 - 2	at 55°C (131°F)	1.3 to 1 6 kΩ
1 - 2	at 60°C (140°F)	1.1 to 1.4 kΩ

NOTE:

Touching the sensor even slightly may change the resistance value. Hold the connector of the sensor.
When measuring the resistance, the sensor temperature must be the same as the ambient temperature.

HINT:

As the temperature increases, the resistance decreases (see the graph).

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

Fig 1: Temperature And Resistance Graph - Duct Temperature Sensor