ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [MZ-CD 1.6]


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Visual Inspection

1.  Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZ-CD 1.6].)

2.  Verify that there are no metal shavings on the sensor.

3.  Visually inspect the ECT sensor for the following:

•  Damage
•  Cracks
•  Rusted sensor terminal
•  Bent sensor terminal
―  If there is any malfunction, replace the ECT sensor.

4.  Install the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZ-CD 1.6].)


Voltage inspection

1.  Idle the engine.

2.  Measure the output voltage between ECT sensor terminal B and body ground.

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•  If not within the specification, replace the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZ-CD 1.6].)

ECT sensor signal voltage (reference)

Water temperature (°C {°F})

Voltage (V)

30 {86}
Approx. 2.6
50 {122}
Approx. 1.7
70 {158}
Approx. 1.1