Most of the latest makes and models have electronically operated cooling fans with no mechanical connection to the engine. Common Symptoms Aside from the illumination of the Check Engine light, the only obvious symptom of this error code is the increase of engine temperature as soon as the vehicle idles or stops, this is because the fans are not running to cool off the engine. Sign In Josh; Check for power and ground at the connector for the fan. It can't hurt to try it and see what happens. Less common causes include corroded or loose electrical connectors, a faulty engine coolant temperature sensor, and open or shorted electrical wiring often resulting in a blown fuse. Sign In Hey, Dan; Yes, I'm pretty sure you are right.
If they are, proceed to next step. When the vehicle is not running, then there will be no air passing through the radiator. Clear codes using code reader and test drive. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Where is best place to start looking.
Then, they conduct a visual inspection of the fan system. This duty cycle corresponds to fan speed which correlates to the amount of air movement caused by the fan. Fan 1 will not come on, but relay is closed so the circuit should be energized. I have inspected all wiring and cannot find any issues. Is the test lamp illuminated? You can also, while the connector is off, supply a false 12V and ground to see if the fan runs. Perform basic electrical test as follows: Connect your red positive multimeter end to + battery post and your black ground multimeter end to - battery post and measure voltage.
If battery acid present, sprinkle baking soda and water on affected area, wipe with old rag and discard appropriately. If there is no click coming from the relay, try replacing the relay with new one. This will aid in understanding the two distinct modes of operating the relays and coolant fans. Org The Jeep Grand Cherokee Owners Community JeepGarage. Visually inspect terminals, wires and battery body for signs of damage or corrosion. Battery acid will burn your skin!.
The mechanical timing is also something that you should check, as we mentioned above. This is where the purpose of the fans kicks in — to provide ample cooling for both the radiator and engine to keep them from overheating. For an intermittent, refer to. This closes the relay switch and allows current to flow from the battery, through the switch contacts on circuit 409 to the Left Hand cooling fan. Generally speaking , there are 2 relays that control your cooling fans, the low speed relay and the high speed relay. P0480 Kia Description When the ambient air temperature is warm or the airflow across the engine is low, the engine coolant temperature can become hot. If the coolant temperature becomes too hot, it is possible that the engine could be damaged.
This system which uses three relays to control two fan motors appears complicated. How does a mechanic diagnose the P0480 code? This fan now has its own dedicated circuit and will operate at full speed. This provides power to the Right Hand cooling fan motor. The problem usually occurs after driving in heavy snow conditions where snow and ice form at the bottom of the fan shroud and block the fan blade. If your are for a different car, select that vehicle series before searching for the diagnostic codes because not all used by one manufacture are used by the other makes. Cooling Fan 1 Control Circuit, and my cooling fan will not turn on anymore. If this code is active, more then likely your cooling fan s will not come on at one or any speeds.
Should there any problem within the circuit that will cause the fan to fail, the engine will heat up, causing it to overheat. What repairs can fix the P0480 code? Did you find and correct the condition? Using your multimeter, measure the resistance in the wires involved and check for short to power or ground. This can happen whether the vehicle is sitting still or driving at slow speed. Many of these won't command the fan 'on' until engine temp reaches 230-235F. To aid in better understanding this system it is suggested to follow the circuits in the schematic as you read the description. Hearing the click means the relay is activating. He is much more familiar with this than I.
Does the current draw measure less than the specified value shown but not 0? Perform any necessary repairs, clear codes and test drive vehicle. Got power to both rad fan relays. Basically, the Error Code P0480 means the cooling fan 1 control circuit has experienced a problem, causing it to malfunction. How serious is the P0480 code? Refer to in Wiring Systems. If everything looks good, look at the electrical connections themselves for signs of loose connections or corrosion around the plug s. Electric fan is responsible for causing air movement around the engine coolant radiator.