Toyota Avalon (XX50): Engine Coolant Temperature Sensor

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / 2gr-fks Engine Control / Engine Coolant Temperature Sensor

Components

COMPONENTS

ILLUSTRATION

*1	AIR CLEANER CAP WITH AIR CLEANER HOSE	*2	ENGINE COOLANT TEMPERATURE SENSOR
*3	VACUUM HOSE	*4	NO. 1 FUEL VAPOR FEED HOSE
*5	NO. 2 VENTILATION HOSE	-	-

Inspection

INSPECTION

PROCEDURE

1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

CAUTION:

Do not put your hands into the water that has been heated for the inspection.
Touching the heated water could result in burns.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	20°C (68°F)	2.32 to 2.59 kΩ
1 - 2	80°C (176°F)	0.310 to 0.326 kΩ

NOTICE:

If checking the engine coolant temperature sensor in water, be careful not to allow water to contact the terminals. After checking, wipe the water off the engine coolant temperature sensor.

If the result is not as specified, replace the engine coolant temperature sensor.

*a	Component without harness connected (Engine Coolant Temperature Sensor)

Installation

INSTALLATION

PROCEDURE

1. INSTALL ENGINE COOLANT TEMPERATURE SENSOR

HINT:

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

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(a) Apply a light coat of engine coolant to the O-ring of the engine coolant temperature sensor.

NOTICE:

If reusing the engine coolant temperature sensor, be sure to inspect the O-ring.

(b) Install the engine coolant temperature sensor to the water outlet with the clip.

NOTICE:

If the engine coolant temperature sensor has been struck or dropped, replace it.
Make sure that the O-ring is not cracked or moved out of place when installing the engine coolant temperature sensor.

2. INSTALL AIR CLEANER CAP WITH AIR CLEANER HOSE

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3. ADD ENGINE COOLANT

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4. INSPECT FOR COOLANT LEAK

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5. PERFORM INITIALIZATION

(a) Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

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Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during engine coolant temperature sensor removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
Replacement of engine coolant temperature sensor	Inspection after repair	Poor idle, etc. Engine start function, etc.

PROCEDURE

1. DRAIN ENGINE COOLANT

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2. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE

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3. REMOVE ENGINE COOLANT TEMPERATURE SENSOR

(a) Disconnect the engine coolant temperature sensor connector.

(b) Remove the clip and engine coolant temperature sensor from the water outlet.

NOTICE:

If the engine coolant temperature sensor has been struck or dropped, replace it.

Ecm

Heated Oxygen Sensor

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