This in turn triggers the ECM to either add more fuel or reduce air mixture to create a “rich” situation, designed to cool the cylinders and reduce the potential of overheating. The engine is getting poor fuel economy: when the coolant temperature sensor is not functioning correctly, it tends to relay false information to the engine control module. Noted below are a few of the warning signs that will alert you that the coolant temperature sensor is damaged and needs to be replaced. Before you make the decision to replace the coolant temperature sensor, make sure diagnose some of the warning signs of a faulty coolant temperature sensor. Taking time to properly diagnose the precise cause of the overheating situation is very important to providing a solution and actually fixing what is broken. When a problem occurs with engine heating or overheating, it may be due to one or multiple broken parts. The coolant system on today's cars, trucks, and SUV's is comprised of multiple components that work together to keep your engine running well. Part 1 of 3: Diagnosing a problem with the coolant temperature sensor If you discover that the sensor is failing, you'll have to replace this device by following the step-by-step instructions noted below. When the signal is sent to the ECM, the computer adjusts the vehicles ignition timing, fuel flow, and other factors that trim or enhance performance based on the coolant temperature.ĭue to the fact that engine temperature plays a vital role in the overall performance of any vehicle, having a properly functioning coolant temperature sensor is essential. The coolant temperature sensor (switch) utilizes electrical resistance to measure the coolant's temperature.
JEEP 3.6 COOLANT TEMP SENSOR LOCATION DRIVER
When the sensor is functioning properly, it will tell your on board computer if the temperature is too high, alerting the driver that a problem exists by illuminating a warning light on the dashboard. The coolant temperature sensor, also known as the coolant temperature switch, is the engine management system that monitors the temperature of the coolant and relays this information to the ECM. One of the most important systems to monitor is the cooling system, which includes the radiator, water pump, radiator fan, coolant lines, and overflow tank. QUOTE=toxicwaste29 477227]Here is a short brief write up for replacing the coolant temp sensor on a 3.6:Today's engines monitor virtually every function to ensure your vehicle runs strongly and efficiently every day. Just wanted to verify this was for a 2012 jeep GC. Pictures really helped, but when I took the driver tire and fender liner off it was solid metal behind it, with no opening. I let the jeep run and burp any possible air bubbles out however this step can be skipped since the engine should burp itself as it runs during normal driving. Now the electric connector can be hooked back up and the inner fender put back into place. Some coolant will be lost but even if the radiator is drained coolant will still be in the block causing it to be lost anyways. As soon as the old sensor is out immediately put the new sensor in and tighten it down. Now since there is coolant in the block you want the new sensor ready to go in. The plastic connector on top needs removed first and then the sensor can be removed using a 19mm wrench. After the liner is removed there is tons of room for reaching the sensor. This part there is only one 10mm bolt and the rest are plastic pins. Instead I decided to remove the driver inner fender liner to reach the temp sensor.
There is absolutely no way to remove the senor from up top without maybe removing the steering shaft. The first is it looking down near the steering shaft. I had to do some searching before I finally found it. The new 3.6 doesn't have the coolant tempo sensor near the coolant inlet on the front of the block. Here is a short brief write up for replacing the coolant temp sensor on a 3.6:
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