LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1975 (Engine Controls - Powertrain DTC Charts And Descriptions - (Hybrid)) >> DTC Diagnosis >> P0481 - Fan 2 Control Circuit

P0481 - Fan 2 Control Circuit

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P0481 - FAN 2 CONTROL CIRCUIT

Description:  Monitors the HFC primary circuit output from the powertrain control module (PCM). The test fails if 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
Diagnostic Aids:  When the HFCF 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 HFC circuit.
A short to voltage 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 
All   refer to PINPOINT TEST KF .
scientia non olet · About LEMON Manuals