Can a faulty coolant temperature sensor affect cooling fans?
A coolant temperature sensor is a vital part of an automobile engine’s cooling system. Without a properly operating cooling system, the engine will run hot which will cause the engine to operate inefficiently and may result in serious damage. Coolant Sensor Purpose
Can a bad coolant sensor cause a car to not start?
Some cars use the engine coolant temperature sensor to control the electric cooling fans. You have two separate temperature sensors for the fans, dashboard gauge, and engine management in most cars. However, if your car has a single sensor, a bad engine coolant temperature sensor may result in your fans won’t start at all.
What’s the name of the coolant temperature sensor?
Coolant temperature sensors are also known as engine coolant temperature sensors or ECT sensors. The principle working of this sensor involves the use of an electrical resistance which measures the temperature of the coolant.
Why does the radiator fan not come on when the AC is on?
In order for the AC Condensor to do its job it must stay as cool as it can. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem.
How does the temperature sensor work on a radiator fan?
I would do some testing though just to be sure. It is a simple system as cooling fans go. The ECT sensor tell the PCM the temperature, at 209 degrees the PCM sends a pulsed power signal to the fan control module. That signal keeps getting faster as the temperature rises.
Coolant temperature sensors are also known as engine coolant temperature sensors or ECT sensors. The principle working of this sensor involves the use of an electrical resistance which measures the temperature of the coolant.
Some cars use the engine coolant temperature sensor to control the electric cooling fans. You have two separate temperature sensors for the fans, dashboard gauge, and engine management in most cars. However, if your car has a single sensor, a bad engine coolant temperature sensor may result in your fans won’t start at all.
Why does my radiator fan only work when the a / C is on?
I was told that it was a faulty temperature sensor which I replaced. The fan still inst working, however if I unplug the temperature sensor the fan works from start up. The fan also works when the A/C is on. What could be the problem? have the same problem?
Why do the fans come on when I Disconnect The Temp sensor?
Since the fans turn on when the temp sensor is disconnected, it can’t be a fan relay. It must be the 2 wire temp sensor or the ECU. Most likely the temp sensor since when it’s disconnected, the ECU turns the fans on.
What does the coolant sensor on an engine do?
The coolant sensor is basically a thermometer that reports the internal engine temperature to the engine’s control computer. Information from the sensor is used by the computer to make adjustments to the fuel injection system, ignition timing and other engine components.
Why do my fans go on when I unplug the PCM?
Answer: Unplugging the sensor causes the PCM to default the coolant temperature as -40 degrees F. This is why the fans go on. Normally this means that the wiring and the PCM (which turns on the fans) is functioning.
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.
How does an engine coolant sensor work on a car?
This way, the computer knows how hot the engine is running and if it’s getting close to overheating. The ECT sensor may also control the temperature gauge on your dash, though in some vehicles, that is done instead by the engine coolant sending unit, otherwise known as a temperature switch.
What should I do if my coolant sensor is bad?
So, check to make sure there’s no coolant leak before getting a new sensor. A faulty sensor should be replaced. Because the ECT sensor is submerged in coolant, the cooling system should be drained at this time and then refilled.
Why does my Jetta not have a cooling fan?
Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. Its possible that you have no problem at all. Was this answer helpful? I got a 2002 Jetta the cooling fans don’t turn on .
What are the symptoms of a bad coolant temperature switch?
1. Poor fuel economy 2. Black smoke from engine 3. Overheating engine 4. Check Engine Light comes on The coolant temperature sensor, also known as the coolant temperature switch, is an engine management system sensor that is used to monitor the temperature of the engine’s coolant.
What happens if your coolant temp is too high?
Your vehicle’s engine must stay within a specific temperature range to perform properly. However, if the engine’s temperature got very high, your engine can get overheated and damaged completely. To do the job, your vehicle pushes a certain fluid called the ‘coolant’ to maintain the engine’s temperature.
A coolant temperature sensor is a vital part of an automobile engine’s cooling system. Without a properly operating cooling system, the engine will run hot which will cause the engine to operate inefficiently and may result in serious damage. Coolant Sensor Purpose
Your vehicle’s engine must stay within a specific temperature range to perform properly. However, if the engine’s temperature got very high, your engine can get overheated and damaged completely. To do the job, your vehicle pushes a certain fluid called the ‘coolant’ to maintain the engine’s temperature.
What are the symptoms of a bad cooling fan relay?
1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.
Where is the coolant temperature sensor located in the engine?
Typically, the coolant temperature sensor is mounted in the engine block or cylinder head, near the thermostat or where the coolant flow is hottest. More than one coolant temperature sensor may be used on some systems to determine the temperature in different locations.
Why does my car coolant sensor keep dropping?
If there is a leak in the engine bay and the oil enters the engine block, the coolant will get contaminated, causing a problem to the ECT sensor. The coolant system of the car does not need constant refilling. However, if the coolant level is dropping frequently, there might be a leak which should be fixed immediately.
How does a bad coolant temperature sensor affect engine performance?
You can do it at home using a digital multimeter and a cooking thermometer. A bad engine coolant temperature sensor affects engine performance: It may cause a constant lean air/fuel mixture, causing the engine to stall or idle rough. Or it may cause a constant rich air/fuel mixture, causing an increase in emissions and fuel consumption.
How to get discount on coolant temperature sensor?
10% OFF $75. Use Code: DIYSAVE10 Online Ship-to-Home Orders Only Keep your engine cool-regardless if the temperatures are skyrocketing outside-by making sure your coolant temperature sensor is operating correctly.
Can a faulty coolant sensor cause black smoke?
A defective sensor can also produce black smoke from the exhaust pipe, since more gas is being used than necessary. Other indicators of a faulty sensor include difficulty starting your ride after it has reached its typical working temperature, or if your coolant temperature gauge fluctuates irregularly.
Are there coolant temp sensors for Ford Ranger?
Rest assured that we stock customized sensors designed specifically for your make and model, such as a Dodge Ram coolant temp sensor and coolant temperature sensors for Ford Ranger pick-up trucks.You can enjoy our Same Day Pickup option when ordering online.
What happens when I unplug the temperature sensor?
The fan still inst working, however if I unplug the temperature sensor the fan works from start up. The fan also works when the A/C is on. What could be the problem? have the same problem? Fan will default to on with no signal from the sensor, the only other item would be the fan control module.
How does the ECT sensor work on a fan?
It is a simple system as cooling fans go. The ECT sensor tell the PCM the temperature, at 209 degrees the PCM sends a pulsed power signal to the fan control module. That signal keeps getting faster as the temperature rises. The control module gets that signal and uses larger power transistors to pass the pulsed signal to the fan.
Why is the temperature sensor on my radiator not working?
Any added resistance from corrosion or a loose pin can cause a problem. You say you changed the sensor, how about an odd test. Unplug the sensor wiring and plug in the old sensor. Now just turn on the key and use a small torch or even a candle to heat the old sensor on the area that was inside the engine.
Since the fans turn on when the temp sensor is disconnected, it can’t be a fan relay. It must be the 2 wire temp sensor or the ECU. Most likely the temp sensor since when it’s disconnected, the ECU turns the fans on.
What should coolant temp be to turn on electric fan?
If your ideal operating temperature is 176-180 I’d agree with setting your fan to turn on at 185, that way it kicks on whenever your coolant temperature starts to climb above that temp your fan can keep things in check.
Typically, the coolant temperature sensor is mounted in the engine block or cylinder head, near the thermostat or where the coolant flow is hottest. More than one coolant temperature sensor may be used on some systems to determine the temperature in different locations.
Where does the coolant go in a Ford Ranger?
In a lot of cases, coolant from the split EGR cooler gets into the exhaust manifold, but we’ve also heard of the odd example where the coolant has got into the cylinders and hydraulicked the engine. A specialist workshop will be able to test your EGR to see whether it’s leaking or not.
Where is the coolant temperature sensor located on an engine?
The readings produced from the coolant temperature sensor are transmitted to the engine control unit, where they are utilized as data for regulating and maintaining the proper ignition time and the optimal fuel injection through the computerized approach. The engine coolant temperature sensor is usually located on the engine block or cylinder head.
What’s the problem with the Ford Ranger manual gearbox?
There’s nothing wrong with the six-speed manual gearbox itself, but a few owners have found out the hard way about the standard dual-mass flywheel (DMF). The DMF is an engineering solution for the vibrations and driveline shunt inherent in a lot of modern engines that produce big Newton-metre at grumbly-low engine revs.
Why does my Polaris Ranger keep overheating?
It would get so hot by the time the fan came on with temps in the 210 + range and when the fan kicked on if would drop to about 190. At times if you stopped with it hot the ranger would not start until the temp cooled down. The key on and fan running without the motor does not cool it down.
How do you remove a coolant temperature sensor?
Step 7: Remove electronic harness from the temperature sensor. It’s time to locate and remove the coolant temperature sensor. The first thing is remove the electronic harness that connects to the sensor. Typically this sensor is attached with a plastic clip.
Why is the temperature sensor on my Epson fan not working?
I forget what the measure was at the exhaust thermistor, but it was not zero. A return of zero ohms from a thermistor means infinite temperature. So the Epson processor must have interpreted this as superheated air entering the fan, and shut down, throwing a temperature alarm.
How do you turn on a radiator fan?
Unplug the sensor wiring and plug in the old sensor. Now just turn on the key and use a small torch or even a candle to heat the old sensor on the area that was inside the engine. What does the fan do?
What should I do before replacing my coolant temperature sensor?
Make sure to clean the sensor’s insert area before you reinstall the temperature sensor. In some cases, dirt, debris, and other particles will impact the function of the coolant temperature sensor, so you want to make sure you have a clean area before installing the new one.
When to replace the air inlet temperature sensor?
It should match the air inlet temperature (IAT) reading when the engine is cold, and gradually increase as the engine warms up. The sensor’s resistance also can be checked with an ohmmeter and compared to specifications for various temperatures. If the sensor is not reading correctly, it needs to be replaced.
How can I tell when my air conditioner sensor needs to be replaced?
The sensor’s output can be read on a scan tool, or checked by reading its frequency or voltage output on a DVOM. If the sensor is reading out of range, check the sensor’s connection to the intake manifold for a possible vacuum leak. If there’s no leak, the sensor needs to be replaced.
Why are my radiator fans not turning on?
This is why the fans go on. Normally this means that the wiring and the PCM (which turns on the fans) is functioning. I would suspect a faulty sensor, but it was replaced. There could be a problem in the wiring to the PCM. High resistance or a partially broken wire causing the temp sensor signal to the PCM to be skewed / inaccurate.
What should temp be when cooling fan does not come on?
NOTE: if the cooling fan doesn’t come on when the engine has been operating for 20 minutes or more, make sure that coolant is reaching operating temperature, around 220°F (104°C). You may be dealing with a stuck-open thermostat.
This is why the fans go on. Normally this means that the wiring and the PCM (which turns on the fans) is functioning. I would suspect a faulty sensor, but it was replaced. There could be a problem in the wiring to the PCM. High resistance or a partially broken wire causing the temp sensor signal to the PCM to be skewed / inaccurate.
Why is the coolant sensor on my radiator not working?
There could be a problem in the wiring to the PCM. High resistance or a partially broken wire causing the temp sensor signal to the PCM to be skewed / inaccurate. You need to have a scanner on it to look at what the PCM is showing as the coolant temp.
Is there a way to test a radiator fan?
You can test the electrical radiator fans by taking a wire from the car battery, unplug the radiator fan connector, and put 12v+ and ground into the connector. This is the fastest and easiest way to test your radiator fans. Because the radiator fan is often drawing so much power, there is often a relay that is powering the coolant fan.
What should the temp of the coolant sensor be?
Check that the temperature value of the CTS is around 80-90c when the engine is hot. A lot of engine coolant temperature sensors have two wires and the sensor is controlled by Ohm. Get a wiring diagram and find out what ohms you should have at a specific temperature to check the function.
How does the cooling fan work on a car?
The cooling fan is used to blow air across the radiator which helps to accelerate the cooling of the radiator and the engine coolant inside it. The cooling fan is turned off and on as needed by the engine’s control computer based upon information from the coolant temperature sensor.
What should I do if my radiator fan won’t work?
If the radiator fan is in working condition, move on to the next step. The ECT sensor monitors the coolant temperature, and allows the fan to turn on if the coolant is too hot. If this sensor is faulty, a replacement costs around $25 to $45. Follow these steps to test it: Locate the ECT sensor, which is just below the distributor.
How can I tell if my radiator fan relay is bad?
Another easy way you can check if the radiator fan switch relay is bad is to swap the radiator fan relay with the condenser fan relay. If the radiator fan begins working, this is an indication that the fan relay is bad. If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step.