What should the voltage be on the ECT sensor?
The normal value of the ECT sensor voltage is 2V at cold engine and 0.5V at warm engine. A defect sensor can indicate a voltage of 1.5V at cold engine and 1.25V at warm engine, thus causing difficulties of starting a cold engine and a presence of rich fuel mixture when the engine is warm.
What should the ECT reading be on my car?
ECT (Engine Coolant Temperature) Sensor. In general terms if the ECT reading is cold the reading could be less than 0.5 volts (on the ground signal) and when the engine is hot the reading could be around 4 volts. For specific readings for your application, see a vehicle-specific repair manual.
Where does the coolant temperature ( ECT ) sensor go?
The readings from the engine coolant temperature (ECT) sensor; are sent back to the engine control unit (ECU). The engine coolant temperature (ECT) sensor is one of the most important; engine management sensors.
Why does my ECT sensor always read hot May?
So, a faulty (ECT) sensor that always reads cold may; cause the fuel control system to run rich pollute and waste fuel. Also, a (ECT) sensor that always reads hot may; cause cold driveability problems such as stalling, hesitation and rough idle.
What should the temperature be on the ECT sensor?
Usually around 250° F, even tho’ the engine is cold. This condition leads the PCM to register a P0118 DTC. It will receive input from the ECT sensor showing an extremely low temperature.
What should the voltage be on the ECT?
Connect the positive wire of the voltmeter is to the ECT signal terminal. Start the engine form cold state. Depending on the temperature, voltage readings should be in the range of 2V to 3V. The relationship between the voltage and the temperature is shown in Table-1.
What does the ECT sensor tell the PCM?
When there’s a problem with the ECT sensor or its circuits, the PCM will see one of the three distinct conditions: It will receive input from the ECT sensor indicating an extremely high coolant temperature. Usually around 250° F, even tho’ the engine is cold.
What should the ECT be when the engine is warm?
Start the engine and warm it to the operating temperature. During engine warming the voltage should decrease in accordance with the values given in Table-1. Common problem is that the output resistance (and voltage) changes incorrectly beyond its normal range. The normal value of the ECT sensor voltage is 2V at cold engine and 0.5V at warm engine.
There should be a difference of at least 200 ohms. If not, the sensor is defective. The reference voltage to the sensor from the (PCM) should be about 5-volts. The return voltage signal should be around 3 to 4 volts, when the engine is cold.
The readings from the engine coolant temperature (ECT) sensor; are sent back to the engine control unit (ECU). The engine coolant temperature (ECT) sensor is one of the most important; engine management sensors.
So, a faulty (ECT) sensor that always reads cold may; cause the fuel control system to run rich pollute and waste fuel. Also, a (ECT) sensor that always reads hot may; cause cold driveability problems such as stalling, hesitation and rough idle.
There should be a difference of at least 200 ohms. If not, the sensor is defective. The reference voltage to the sensor from the (PCM) should be about 5-volts. The return voltage signal should be around 3 to 4 volts, when the engine is cold.
Where are the sensors on a Honda Accord?
Fuel Tank Pressure Sensor Air Temperature Sensor ( Ambient / Intake 1 Manifold Pressure/Vacuum Sensor Power Steering Pressure Switch Throttle Position Sensor Transmission Position Sensor/Switch Variable Valve Timing Actuator Position Sensor Variable Valve Timing Pressure Switch Camshaft Position Sensor Crankshaft Position Sensor