Rad Fan Control Relay Circuit

If you have a p1491 radiator fan control relay circuit trouble code this post will help you understand what it is and how to fix it.

Rad fan control relay circuit.

If the temperature reaches more than 223 f value depends on make model or engine of the vehicle the pcm automatically command the cooling fan relay to turn on its fan by supplying the ground to the relay. Refer to code repair chart in other manuals or media. The best part is our jeep grand cherokee radiator fan control relay products start from as little as 46 99. Start by checking the possible causes listed above.

P1491 radiator fan control relay circuit. Advance auto parts has 8 different radiator fan control relay for your vehicle ready for shipping or in store pick up. Should there any problem within the circuit that will cause the fan to fail the engine will heat up causing it to overheat. When it comes to your jeep grand cherokee you want parts and products from only trusted brands.

Radiator fan control relay harness is open or shorted radiator fan control relay circuit poor electrical connection how is the p1491 dodge code repair. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken bent pushed out or. The engine coolant temperature ect sensor the intake air temperature iat sensor the a c selector switch the a c refrigerant pressure sensor the vehicle speed sensor.

Each relay will control a single fan and a 30 amp fuse is recommended for each relay connection to the battery. Radiator fan control relay harness is open or shorted radiator fan control relay circuit poor electrical connection how is the p1491 chrysler code repair. The vehicle computer monitors coolant temperature with a sensor located near the thermostat. Start by checking the possible causes listed above.

As you can see from the diagrams above and below it s really a simple circuit that not only provides the proper connections to control the cooling fans but unlike the switch under the dash method you won t ever have to worry. The electric cooling fan is controlled by the powertrain control module pcm through the cooling fan relay based on inputs from the following components. Check for damaged components and look for broken bent pushed out or corroded. With the key on or engine running system voltage over 10v fan relay commanded on the powertrain control module detects a shorted or open condition in the relay control circuit.