HEATING / AIR CONDITIONING  AMBIENT TEMPERATURE SENSOR  INSPECTION  

2.74,0.208 3.146,0.427 0.406,0.219 0.365,0.385 0.313,0.167 0.313,0.167 0.208,0.167 false 1.5,3 1.729,2.698 1.729,2.698 1.896,2.698 false 1.917,0.229 2.229,0.385 0.313,0.156 10 false *a 0.021,0.083 0.333,0.24 0.313,0.156 10 false *b 0.094,2.917 0.406,3.073 0.313,0.156 10 false *c 1.813,4.427 2.125,4.583 0.313,0.156 10 false *d 1.938,2.625 2.25,2.781 0.313,0.156 10 false *e 0.5,4.229 0.844,4.427 0.344,0.198 10 false (50) 1.031,4.229 1.365,4.479 0.333,0.25 10 false (68) 1.542,4.229 1.875,4.479 0.333,0.25 10 false (86) 2.052,4.219 2.385,4.469 0.333,0.25 10 false (104) 2.604,4.229 2.938,4.479 0.333,0.25 10 false (122) 3.094,4.229 3.427,4.479 0.333,0.25 10 false (140) 2.781,0.24 3.146,0.458 0.365,0.219 10 false A174

*a	Component without harness connected (Thermistor Assembly)
*b	Sensing Portion
*c	Resistance (kΩ)
*d	Temperature (°C (°F))
*e	Allowable Range

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A174-1 - A174-2	10°C (50°F)	3.00 to 3.73 kΩ
A174-1 - A174-2	15°C (59°F)	2.45 to 2.88 kΩ
A174-1 - A174-2	20°C (68°F)	1.95 to 2.30 kΩ
A174-1 - A174-2	25°C (77°F)	1.60 to 1.80 kΩ
A174-1 - A174-2	30°C (86°F)	1.28 to 1.47 kΩ
A174-1 - A174-2	35°C (95°F)	1.00 to 1.22 kΩ
A174-1 - A174-2	40°C (104°F)	0.80 to 1.00 kΩ
A174-1 - A174-2	45°C (113°F)	0.65 to 0.85 kΩ
A174-1 - A174-2	50°C (122°F)	0.50 to 0.70 kΩ
A174-1 - A174-2	55°C (131°F)	0.44 to 0.60 kΩ
A174-1 - A174-2	60°C (140°F)	0.36 to 0.50 kΩ

NOTICE:

·

Hold the sensor only by its connector. Touching the sensing portion 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 result is not as specified, replace the thermistor assembly.