Does the coolant temp sensor control the fan?
Does the coolant temp sensor control the fan?
On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat.
What does the coolant temperature sensor connect to?
The sensor is connected to the engine computer (PCM). The PCM supplies the reference voltage (typically 5 Volt); another wire is the sensor ground. Both the reference voltage and the ground must be checked first. Since the resistance of the sensor drops as the engine warms up, the voltage drops too.
Does the coolant temperature sensor have a fuse?
There isn’t one per se. There will be a fused wire with voltage to the instrument cluster (your owners manual should indicate which fuse), but the temperature sensor is providing a variable “resistance to ground,” which the temperature gauge in the dash is reflecting.
What can a faulty coolant temp sensor do?
If the coolant temperature sensor malfunctions, it can transmit a false signal to the computer. And the response of the computer may unbalance the timing and fuel calculations. It is also common for a coolant temperature sensor to fail without warning and send permanently cold signals to the computer.
Will engine coolant temperature sensor keep car from starting?
The sensor will not cause a no start. It could cause a hard start and a rich or lean condition only.
How many terminals does a 3-wire sensor have?
3 wires
A three-wire sensor has 3 wires present. Two power wires and one load wire. The power wires will connect to a power supply and the remaining wire to some type of load. The load is a device that is being controlled by the sensor.
What sensor controls the temperature gauge?
coolant temperature sensor
A coolant temperature sensor (CTS) (also known as an ECT sensor or ECTS (engine coolant temperature sensor) is used to measure the temperature of the coolant/antifreeze mix in the cooling system, giving an indication of how much heat the engine is giving off.