Ambient 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 AMBIENT 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 1 22 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 ambient temperature sensor

Fig 1: Inspecting Ambient Temperature Sensor