Technical Definition:

Fan Rationality Check

Technical Description:

Possible Causes:

Possible Symptoms:

Cooling Fan Rationality Check Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty fan control relay
– Faulty cooling fan
– Fan control relay harness is open or shorted
– Fan control relay circuit poor electrical connection
– Fan cooling fan harness is open or shorted
– Fan cooling fan circuit poor electrical connection

Specific Makes:

– Engine overheating