Lexus ES manuals

Lexus ES: Engine Coolant Temperature Sensor

Components

COMPONENTS

ILLUSTRATION

*1

ENGINE COOLANT TEMPERATURE SENSOR

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Non-reusable part

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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

Click here

2. 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.

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

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.

Click here

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

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

NOTICE:

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

(c) Connect the engine coolant temperature sensor connector.

2. ADD ENGINE COOLANT

Click here

3. INSPECT FOR COOLANT LEAK

Click here

4. PERFORM INITIALIZATION

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

Click here

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