ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [MZ-CD 1.6 (Y6)]

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Осторожно

•  Water penetrating the connector will cause sensor malfunction. To prevent this, be careful not to damage the wiring harnesses or the waterproof connector so as to cause water penetration.

Примечание

•  Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See ПОРЯДОК ИСПОЛЬЗОВАНИЯ ДАННОГО РУКОВОДСТВА.)

Visual Inspection

1.  Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)

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 (Y6)].)

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 (Y6)].)

Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)

2.  Inspect the following wiring harnesses for an open or short circuit (continuity check).

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Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the wiring harness.

―  ECT sensor terminal A and PCM terminal 244

―  ECT sensor terminal B and PCM terminal 230

Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the wiring harness.

―  ECT sensor terminal A and power supply

―  ECT sensor terminal A and body ground

―  ECT sensor terminal B and power supply

―  ECT sensor terminal B and body ground