P0481 - Fan 2 Control Circuit
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P0481 - FAN 2 CONTROL CIRCUIT
| Description: | This DTC sets when the HFC output is commanded on (grounded) and excessive current draw is detected on the HFC circuit; or when the HFC circuit is commanded off and voltage is not detected on the HFC circuit. The PCM expects to detect VPWR voltage through the high speed fan control (FC) relay coil to the HFC circuit. | ||
| Possible Causes: |
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| Diagnostic Aids: | When the HFC_F PID reads YES, a concern is present. An open circuit or short to ground can only be detected when the PCM is not grounding the HFC circuit. A short to voltage can only be detected when the PCM is grounding the HFC circuit. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test KF . | ||