Room Temperature Sensor: Inspection

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

INSPECT ROOM TEMPERATURE SENSOR

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATIONS

Tester Connection	Condition	Specified Condition
1-2	10°C (50°F)	3.00 to 3.73 kΩ
1-2	15°C (59°F)	2.45 to 2.88 kΩ
1-2	20°C (68°F)	1.95 to 2.30 kΩ
1-2	25°C (77°F)	1.60 to 1.80 kΩ
1-2	30°C (86°F)	1 28 to 1 47 kΩ
1-2	35°C (95°F)	1.00 to 122 kΩ
1-2	40°C (104°F)	0.80 to 1 00 kΩ
1-2	45°C (113°F)	0.65 to 0.85 kΩ
1-2	50°C (122°F)	0.50 to 0.70 kΩ
1-2	55°C (131°F)	0.44 to 0.60 kΩ
1-2	60°C (140°F)	0.36 to 0.50 kΩ

NOTE:

Hold the sensor only by its connector. Touching the sensor may change the resistance value.
When measuring, 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 is not as specified, replace the room temperature sensor

Fig 1: Locating Room Temperature Sensor