Mazda 3 Service Manual: Engine Coolant Temperature (ECT) Sensor Inspection [Mzr 2.0, Mzr 2.5]
ECT Sensor No.1
Resistance inspection
WARNING:
-
When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before removing the ECT sensor.
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Drain the engine coolant..
4. Remove the battery and battery tray..
5. Disconnect the ECT sensor No.1 connector.
6. Remove the ECT sensor No.1..
7. Place the ECT sensor No.1 in water with a thermometer, and heat the water gradually.
8. Measure the resistance between ECT sensor No.1 terminals A and B.
-
If not as specified, replace the ECT sensor No.1..
|
ECT (°C {°F}) |
Resistance (kilohms) |
|
20 {68} |
Approx. 37.34 |
|
80 {176} |
Approx. 3.84 |
ECT Sensor No.2 Inspection
Resistance inspection
WARNING:
-
When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before removing the ECT sensor.
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Drain the engine coolant..
4. Disconnect the ECT sensor No.2 connector.
5. Remove the ECT sensor No.2..
6. Place the ECT sensor No.2 in water with a thermometer, and heat the water gradually.
7. Measure the resistance between ECT sensor No.2 terminals A and B.
-
If not as specified, replace the ECT sensor No.2..
|
ECT (°C {°F}) |
Resistance (kilohms) |
|
20 {68} |
Approx. 2.45 |
|
80 {176} |
Approx. 0.318 |
Engine Coolant Replacement [Mzr 2.0, Mzr 2.5]
WARNING:
Never remove the cooling system cap or loosen the radiator drain plug while
the engine is running, or when the engine and radiator are hot. Scalding engine
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Engine Coolant Temperature (ECT) Sensor Removal/Installation [Mzr 2.0, Mzr 2.5]
WARNING:
When the engine is hot, it can badly burn. Turn off the engine and wait until
it is cool before removing the ECT sensor.
ECT Sensor No.1
1. Remove the battery cover..
2. D ...
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