DTC P0480: Low Fan Control (LFC)/Fan Control 1 (FC1) Primary Circuit Malfunction
WARNING: This page is about a different variant/trim than selected.
P0480 - LOW FAN CONTROL (LFC)/FAN CONTROL 1 (FC1) PRIMARY CIRCUIT MALFUNCTION
| For Relay Controlled Electric Cooling Fan | |||
| Description: | Monitors the LFC or fan control (FC) for 1 speed fan applications, primary circuit output from the powertrain control (PCM). The test fails when the PCM grounds the LFC/FC circuit and excessive current draw is detected on the LFC/FC circuit; or with the LFC/FC circuit not grounded by the PCM the voltage is not detected on the LFC/FC circuit (the PCM expects to detect VPWR voltage coming through the low speed FC relay coil to the LFC/FC circuit) | ||
| Possible Causes: |
|
||
| Diagnostic Aids: | When the LFCF PID reads YES, a fault is currently 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/FC circuit. During the KOEO and key on, engine running (KOER) self-test, the LFC/FC circuit is cycled on and off. | ||
| For Variable Speed Electric Cooling Fan | |||
| Description: | This test checks the fan control-variable (FCV) output circuit. The DTC sets if the powertrain control module (PCM) detects the voltage on the FCV circuit is not within the expected range. | ||
| Possible Causes: |
|
||
| 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 |
| Freestar/Monterey | GO to KF: Fan Control (FC) Relays STEP KF16. | GO to KF: Fan Control (FC) Relays STEP KF16. | GO to KF: Fan Control (FC) Relays STEP KF49. |
| Crown Victoria, Grand Marquis, Town Car, Five Hundred, Freestyle, Montego | GO to KN: Variable Speed Electric Cooling Fan STEP KN1. | GO to KN: Variable Speed Electric Cooling Fan STEP KN1. | GO to KN: Variable Speed Electric Cooling Fan STEP KN7. |
| LS, Thunderbird | GO to KN: Variable Speed Electric Cooling Fan STEP KN12. | GO to KN: Variable Speed Electric Cooling Fan STEP KN12. | GO to KN: Variable Speed Electric Cooling Fan STEP KN19. |
| All others | GO to KF: Fan Control (FC) Relays STEP KF1. | GO to KF: Fan Control (FC) Relays STEP KF1. | GO to KF: Fan Control (FC) Relays STEP KF43. |