Radiator Fan Control Relay Circuit

Problems in the cooling fan circuit.

Radiator fan control relay circuit.

Should there any problem within the circuit that will cause the fan to fail the engine will heat up causing it to overheat. Video on how to diagnose dtc p1491 radiator fan control relay circuit malfunction on a 2003 jeep liberty sport. In the painless performance electric fan relay kit we got from speedway motors a circuit breaker is supplied if you wanted to safely get power directly from the battery. The typical electric cooling fan circuit includes a temperature sensor a relay a control module and the fan motor.

Test the fan relay resistance it should be 30 70 ohms. 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. 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.

We opted to tap into our. If our video s have helped you repair your. However specific troubleshooting steps will vary depending on the vehicle. 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.