Toyota 4Runner: Room Temperature Sensor

Toyota 4Runner Service Manual / Vehicle Interior / Heating / Air Conditioning / Room Temperature Sensor

Components

COMPONENTS

ILLUSTRATION

Removal

REMOVAL

PROCEDURE

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page ).

2. REMOVE NO. 2 SWITCH HOLE BASE

3. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL ASSEMBLY

4. REMOVE INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY

5. REMOVE COMBINATION METER ASSEMBLY

6. REMOVE COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)

(a) Disconnect the connector and hose.

(b) Detach the 2 claws and remove the cooler thermistor.

Inspection

INSPECTION

PROCEDURE

1. INSPECT COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)

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

Standard Resistance:

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

HINT:

As the temperature increases, the resistance decreases (refer to the graph).

NOTICE:

Touching the sensor even slightly may change the resistance value. Hold the connector of the sensor.

When measuring the resistance, make sure the sensor temperature is the same as the ambient temperature.

If the result is not as specified, replace the cooler thermistor (room temperature sensor).

Text in Illustration

Component without harness connected

(Cooler Thermistor (Room Temperature Sensor))

Resistance (kΩ)

Temperature (°C(°F))

Installation

INSTALLATION

PROCEDURE

1. INSTALL COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)

(a) Attach the 2 claws to install the cooler thermistor.

(b) Connect the connector and hose.

2. INSTALL COMBINATION METER ASSEMBLY

3. INSTALL INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY

4. INSTALL LOWER INSTRUMENT PANEL FINISH PANEL ASSEMBLY

5. INSTALL NO. 2 SWITCH HOLE BASE

6. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page ).

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