Radiator Fan Control Relay Circuit

Video on how to diagnose dtc p1491 radiator fan control relay circuit malfunction on a 2003 jeep liberty sport.

Radiator fan control relay circuit. What does that mean. However specific troubleshooting steps will vary depending on the vehicle. 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. 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.

So be sure to test the relay as well as its power supply and ground connections. Test the fan relay resistance it should be 30 70 ohms. We opted to tap into our. Problems in the cooling fan circuit.

Refer to code repair chart in other manuals or media. The relay is the component that fails most often. This is a generic powertrain diagnostic trouble code dtc which means it covers all makes models 1996 newer. The typical electric cooling fan circuit includes a temperature sensor a relay a control module and the fan motor.

Cooling fan relay 1 control circuit.