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HOMESERVICE MANUALSFORD2004FOCUS ZX3, 2.0 3, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - CNG, FLEX-FUEL & GASOLINEDIAGNOSTIC TROUBLE CODE (DTC) CHARTSP0481: HIGH FAN CONTROL (HFC)/FAN CONTROL 3 (FC3) PRIMARY CIRCUIT MALFUNCTION
2004 Ford Focus ZX3, 2.0 3, Standard

P0481: High Fan Control (HFC)/Fan Control 3 (FC3) Primary Circuit Malfunction

2004 Ford Focus ZX3, 2.0 3, StandardSECTION P0481: High Fan Control (HFC)/Fan Control 3 (FC3) Primary Circuit Malfunction
P0481 - HIGH FAN CONTROL (HFC)/FAN CONTROL 3 (FC3) PRIMARY CIRCUIT MALFUNCTION

Description:  Monitors the high fan control (HFC) primary circuit output from the PCM. The test fails if: With the HFC output commanded on (grounded), excessive current draw is detected on the HFC circuit; or, with the HFC circuit commanded off, voltage is not detected on the HFC circuit (the PCM expects to detect VPWR voltage through the high speed FC relay coil to the HFC circuit).
Possible Causes: 
  • Open or shorted HFC circuit.
  • Open VPWR circuit to the high speed FC relay.
  • Damaged high speed FC relay (or CCRM).
  • Damaged PCM.
Diagnostic Aids: 
  • When the HFCF 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 HFC circuit.
  • A short to power can only be detected when the PCM is grounding the HFC circuit.
  • During the KOEO and KOER self-test, the HFC circuit is cycled on and off.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
Taurus, Sable, Focus 2.0L, Escape 3.0L GO to PINPOINT TEST KF: FAN CONTROL RELAYS Step 34. GO to PINPOINT TEST KF: FAN CONTROL RELAYS Step 34. GO to PINPOINT TEST KF: FAN CONTROL RELAYS Step 53.
Mustang GO to PINPOINT TEST X: CONSTANT CONTROL RELAY MODULE (CCRM) Step 4. GO to PINPOINT TEST X: CONSTANT CONTROL RELAY MODULE (CCRM) Step 4. GO to PINPOINT TEST X: CONSTANT CONTROL RELAY MODULE (CCRM) Step 19.
All others GO to PINPOINT TEST KF: FAN CONTROL RELAYS Step 11. GO to PINPOINT TEST KF: FAN CONTROL RELAYS Step 11. GO to PINPOINT TEST KF: FAN CONTROL RELAYS Step 45.
RENDER: 1.0x

NO RELATED

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