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Home >> Jeep >> 2002 >> Liberty Limited, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1491: Rad Fan Control Relay Circuit >> Monitored & Set Conditions

Monitored & Set Conditions

Radiator fan relay voltage is monitored when ignition is on, battery voltage is more than 10 volts. DTC will set in PCM memory if PCM detects an open or shorted condition in radiator fan control relay circuit.