DTC P0480: Fan 1 Control Circuit
P0480 - FAN 1 CONTROL CIRCUIT
| For Relay Controlled Electric Cooling Fan | |||
| Description: | Monitors the LFC primary circuit output from the powertrain control (PCM). The test fails 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 FC relay coil to the LFC circuit). | ||
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| Diagnostic Aids: | When the LFCF PID reads YES, a concern 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 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 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: |
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| 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 test checks the fan control-variable (FCV) output circuit for the cooling fan clutch. The diagnostic trouble code (DTC) sets if the powertrain control module (PCM) detects the voltage on the FCV circuit is not within the expected range. | ||
| Possible Causes: |
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| 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 |
| Crown Victoria, Five Hundred, Freestyle, Fusion, Grand Marquis, LS, Milan, Montego, Town Car, Zephyr | GO to Pinpoint Test KN . | ||
| Cooling Clutch | Fan GO to Pinpoint Test HV . | ||
| All others | GO to Pinpoint Test KF . | ||