DTC P1474: Low Fan Control (LFC)/Fan Control 1 (FC1) Primary Circuit Malfunction
WARNING: This page is about a different variant/trim than selected.
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. |