Evaporator Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT COOLER THERMISTOR SENSOR

Check the resistance.

Fig 1: Checking Resistance Using Ohmmeter

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance and check the results in accordance with the values in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Condition	Specified Condition
1 - 2	-10°C (14°F)	7.40 to 9.20 k
1 - 2	-5°C (23°F)	5.65 to 7.00 k
1 - 2	0°C (32°F)	4.35 to 5.40 k
1 - 2	5°C (41°F)	3.40 to 4.20 k
1 - 2	10°C (50°F)	2.68 to 3.30 k
1 - 2	15°C (59°F)	2.10 to 2.60 k
1 - 2	20°C (68°F)	1.66 to 2.10 k
1 - 2	25°C (77°F)	1.32 to 1.66 k
1 - 2	30°C (86°F)	1.05 to 1.35 k

Fig 2: Measuring Resistance & Check Results In Accordance With Values

If the result is not as specified, replace the cooler thermistor sensor.

NOTE:

Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor.
When measuring, the sensor temperature must be almost the same as the ambient temperature.

HINT:

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