Mitsubishi Car 1999-05

Operation

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The Engine Coolant Temperature (ECT) sensor resistance changes in response to engine coolant temperature. The sensor resistance decreases as the coolant temperature increases, and increases as the coolant temperature decreases. This provides a reference signal to the PCM, which indicates engine coolant temperature. The signal sent to the PCM by the ECT sensor helps the PCM to determine spark advance, EGR flow rate, air/fuel ratio, and engine temperature. The ECT is a two wire sensor, a 5-volt reference signal is sent to the sensor and the signal return is based upon the change in the measured resistance due to temperature.

A 5-volt voltage is applied to the Engine Coolant Temperature (ECT) sensor output terminal from the ECM/PCM via the resistor in the ECM/PCM. The ground terminal is grounded with ECM/PCM. The engine coolant temperature sensor is a negative temperature coefficient type of resistor. It has the characteristic that when the engine coolant temperature rises the resistance decreases. The engine coolant temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases.

A 5-volt voltage is applied to the Engine Coolant Temperature (ECT) sensor output terminal from the ECM/PCM via the resistor in the ECM/PCM. The ground terminal is grounded with ECM/PCM. The engine coolant temperature sensor is a negative temperature coefficient type of resistor. It has the characteristic that when the engine coolant temperature rises the resistance decreases. The engine coolant temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases.

A 5-volt voltage is applied to the Engine Coolant Temperature (ECT) sensor output terminal from the ECM/PCM via the resistor in the ECM/PCM. The ground terminal is grounded with ECM/PCM. The engine coolant temperature sensor is a negative temperature coefficient type of resistor. It has the characteristic that when the engine coolant temperature rises the resistance decreases. The engine coolant temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases.

A 5-volt voltage is applied to the Engine Coolant Temperature (ECT) sensor output terminal from the ECM/PCM via the resistor in the ECM/PCM. The ground terminal is grounded with ECM/PCM. The engine coolant temperature sensor is a negative temperature coefficient type of resistor. It has the characteristic that when the engine coolant temperature rises the resistance decreases. The engine coolant temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases.

A 5-volt voltage is applied to the Engine Coolant Temperature (ECT) sensor output terminal from the ECM/PCM via the resistor in the ECM/PCM. The ground terminal is grounded with ECM/PCM. The engine coolant temperature sensor is a negative temperature coefficient type of resistor. It has the characteristic that when the engine coolant temperature rises the resistance decreases. The engine coolant temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases.

A 5-volt voltage is applied to the Engine Coolant Temperature (ECT) sensor output terminal from the ECM/PCM via the resistor in the ECM/PCM. The ground terminal is grounded with ECM/PCM. The engine coolant temperature sensor is a negative temperature coefficient type of resistor. It has the characteristic that when the engine coolant temperature rises the resistance decreases. The engine coolant temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases.

 
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