Toyota Yaris: Heating / Air Conditioning / Room Temperature Sensor

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Interior / Heating / Air Conditioning / Room Temperature Sensor

Components

COMPONENTS

ILLUSTRATION

*1	NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY	*2	COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)
*3	ASPIRATOR	-	-

Removal

REMOVAL

PROCEDURE

1. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

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2. REMOVE COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)

(a) Disconnect the connector and aspirator.

(b) Using a screwdriver with its tip wrapped in protective tape, disengage the claws to remove the cooler thermistor (room temperature sensor).

*a	Protective Tape

Inspection

INSPECTION

PROCEDURE

1. INSPECT COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)

(a) Check the resistance.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
H58-1 (+) - H58-2 (-)	10°C (50°F)	3.00 to 3.73 kΩ
H58-1 (+) - H58-2 (-)	15°C (59°F)	2.45 to 2.88 kΩ
H58-1 (+) - H58-2 (-)	20°C (68°F)	1.95 to 2.30 kΩ
H58-1 (+) - H58-2 (-)	25°C (77°F)	1.60 to 1.80 kΩ
H58-1 (+) - H58-2 (-)	30°C (86°F)	1.28 to 1.47 kΩ
H58-1 (+) - H58-2 (-)	35°C (95°F)	1.00 to 1.22 kΩ
H58-1 (+) - H58-2 (-)	40°C (104°F)	0.80 to 1.00 kΩ
H58-1 (+) - H58-2 (-)	45°C (113°F)	0.65 to 0.85 kΩ
H58-1 (+) - H58-2 (-)	50°C (122°F)	0.50 to 0.70 kΩ
H58-1 (+) - H58-2 (-)	55°C (131°F)	0.44 to 0.60 kΩ
H58-1 (+) - H58-2 (-)	60°C (140°F)	0.36 to 0.50 kΩ

NOTICE:

Hold the cooler thermistor (room temperature sensor) only by its connector. Touching the sensing portion may change the resistance value.
When measuring, the cooler thermistor (room temperature 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 cooler thermistor (room temperature sensor).

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

Installation

INSTALLATION

PROCEDURE

1. INSTALL COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)

(a) Engage the claws to install the cooler thermistor (room temperature sensor).

(b) Connect the connector and aspirator.

2. INSTALL NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

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