What is a fan 1 control circuit?
Diagnostic Trouble Code (DTC) P0480 stands for “Fan 1 Control Circuit.” The engine cooling fan system is controlled and monitored by your vehicle’s computer and various sensors. The PCM detects the temperature increase through the coolant temperature sensor.
How do I fix code P0691?
How To Correct P0691 Cooling Fan 1 Relay Control Circuit Low
- First of all, the car mechanic should verify the code by using a scanner.
- After that the wiring schematic for the vehicle should be obtained.
- You can always repair and update the PCM wiring and connectors.
Can cooling fan cause Check Engine Light?
In intermittent cases, your check engine light may come on while you’re driving, which means your cooling fan switch needs to be replaced. It’s important to bring your vehicle in right away for a diagnostic check, regardless of whether it’s a problem with the engine or not.
What is a cooling fan relay?
A cooling fan relay is used on vehicles that have an electrical fan to cool the engine. The function of the cooling fan relay is to convert a low voltage signal from either the electronic control module (ECM) or a thermostatically controlled sensor.
How do you test a fan switch?
Turn on the burner and slowly increase the water temperature. The ohmeter should be turned on and have a reading of high resistance. When the water reaches between 180 to 220 degrees Fahrenheit, the switch should turn on and the resistance seen by the ohmmeter should change to zero.
What are the symptoms of a faulty radiator fan?
These are the most common signs of a faulty radiator fan assembly in need of replacement:
- Engine Overheating. When the radiator fan isn’t functioning properly, it is not able to adequately cool down the car’s engine.
- Air Conditioner Function Diminished.
- Loud Noise Coming From Radiator Fan.
