DTC P1474: Low Fan Control (LFC)/Fan Control 1 (FC1) Primary Circuit Malfunction
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P1474 - LOW FAN CONTROL (LFC)/FAN CONTROL 1 (FC1) PRIMARY CIRCUIT MALFUNCTION
| Description: | Monitors the LFC or fan control (FC) for one speed fan application, primary circuit output from the powertrain control module (PCM). The test fails if the PCM grounds the LFC/FC circuit, excessive current draw is detected on the LFC/FC circuit, or with the LFC/FC circuit not grounded by the PCM, 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: |
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| Diagnostic Aids: | When the LFCF PID reads YES, a fault is currently present. An open circuit or short to ground can only be detected when the PCM is not grounding the LFC/FC circuit. A short to voltage can only be detected when the PCM is grounding the LFC/FC circuit. During the key on engine off (KOEO) and key on engine running (KOER) self-test, the LFC/FC circuit is cycled on and off. |
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| 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. |
| 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. |