DTC P0480: Fan 1 Control Circuit

P0480 - FAN 1 CONTROL CIRCUIT

For Relay Controlled Electric Cooling Fan
Description: This DTC sets when the PCM grounds the LFC circuit and excessive current draw is detected on the LFC circuit; or with the LFC circuit not grounded by the PCM the voltage is not detected on the LFC circuit (the PCM expects to detect VPWR voltage coming through the low speed fan control relay coil to the LFC circuit).
Possible Causes: LFC circuit open or short VPWR circuit to the low speed (FC) relay open Damaged low speed FC relay
Diagnostic Aids: When the LFC PID reads YES, a concern is present. During the key ON engine OFF (KOEO) self-test, the cooling fan is cycled ON and OFF. A short to voltage can only be detected when the PCM is grounding the LFC circuit. During the KOEO and key ON engine running (KOER) self-test, the LFC circuit is cycled ON and OFF.
For Variable Speed Electric Cooling Fan
Description: This DTC sets if the PCM detects the voltage on the FCV circuit is not within the expected range.
Possible Causes: FCV circuit open or short B+ or ground circuit concern to cooling fan VPWR open to cooling fan (if applicable) Damaged cooling fan module
Diagnostic Aids: During the key ON engine OFF (KOEO) self-test, the cooling fan is cycled ON and OFF.
For Cooling Fan Clutch
Description: This DTC sets if the PCM detects the voltage on the FCV circuit is not within the expected range.
Possible Causes: FCV circuit open FCV circuit short to voltage or ground Damaged cooling fan clutch solenoid
Diagnostic Aids: During the key ON engine OFF (KOEO) self-test, the cooling fan is cycled ON and OFF.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Escape, Expedition, F-150, Fiesta, Mustang, Navigator, Transit Connect	GO to PINPOINT TEST KF .
Edge, Explorer, Flex, Focus, Fusion, MKS, MKT, MKX, MKZ, Taurus	GO to PINPOINT TEST KN .
F-Series Super Duty	GO to PINPOINT TEST HV .