P0480 - Fan 1 Control Circuit
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P0480 - FAN 1 CONTROL CIRCUIT
| Description: | Monitors the low fan control (LFC) primary circuit output from the powertrain control module (PCM). The test fails if the PCM grounds the LFC circuit, excessive current draw is detected on the LFC circuit, or with the LFC circuit not grounded by the PCM, 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). | ||
| Possible Causes: |
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| Diagnostic Aids: | When the LFC_F PID reads YES, a concern is currently present. An open circuit or short to ground can only be detected when the PCM is not grounding the LFC circuit. A short to voltage can only be detected when the PCM is grounding the LFC circuit. During the KOEO and KOER self-test, the LFC circuit is cycled on and off. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST KF . | ||