DTC P1490: Low Speed Fan Control Relay Circuit: Description

Radiator low speed 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 low speed radiator fan control relay circuit. Possible causes for DTC to set are: defective low speed radiator fan relay, defective PCM, or defective connectors or wiring.