Does PCM control cooling fan?
The PCM controls fan operation; it uses the signal from the ECT or engine coolant temperature sensor. The PCM operates the fan motor through the engine’s cooling fan relay.
Where is the sensor for the cooling fan?
The cooling fan control module in your vehicle is located at the front left of the engine compartment next to the radiator.
What controls the cooling fan?
The fans are controlled either with a thermostatic switch or by the engine computer, and they turn on when the temperature of the coolant goes above a set point. They turn back off when the temperature drops below that point. This clutch is positioned at the hub of the fan, in the airflow coming through the radiator.
What does the coolant temp sensor do on a Dodge Ram?
The coolant temp sensor (s) have a few jobs. They send a signal to the gauges so you can monitor engine temperature, they tell the radiator fans when to kick on or off, and they let the ECU know how warm the engine is so that it can fine-tune the fuel delivery to give you maximum performance as well as fuel efficiency.
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.
What should the radiator temperature be in a Dodge Grand?
Normal operating temperature around 200°F ohmmeter should read approximately 700 to 1,000 ohms . Room temperature around 70°F ohmmeter should read approximately 7,000 to 13,000 ohms . Test the resistance of the wire harness between the PCM connector terminal 26 and the sensor harness connector.
When did the coolant change on Dodge Ram?
If left unchecked, cooling problems can lead to series engine damage like warped heads. From 1994 to 1997, the Ram had two coolant temp sensors (CTS) to handle the different functions. In ’97, they began switching over to one multi-function CTS, and in ’98 and up they all had just one.
The coolant temp sensor (s) have a few jobs. They send a signal to the gauges so you can monitor engine temperature, they tell the radiator fans when to kick on or off, and they let the ECU know how warm the engine is so that it can fine-tune the fuel delivery to give you maximum performance as well as fuel efficiency.
When to replace an engine coolant temperature sensor?
If the engine sustains any kind of trauma or damage, sensor replacement is always recommended because you don’t want to risk running the vehicle with a faulty one. Even general wear and tear can cause the sensor to erode over time. You can always have your CTS replaced by an auto care professional.
If left unchecked, cooling problems can lead to series engine damage like warped heads. From 1994 to 1997, the Ram had two coolant temp sensors (CTS) to handle the different functions. In ’97, they began switching over to one multi-function CTS, and in ’98 and up they all had just one.
Normal operating temperature around 200°F ohmmeter should read approximately 700 to 1,000 ohms . Room temperature around 70°F ohmmeter should read approximately 7,000 to 13,000 ohms . Test the resistance of the wire harness between the PCM connector terminal 26 and the sensor harness connector.