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Home >> Ford >> 1999 >> Escort ZX2, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 787 (Engine Controls - Diagnostic Subroutines -- Diesel 6.0L (99P E-Series & 99P F450/550)) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> P0480 - Fan 1 Control Circuit

P0480 - Fan 1 Control Circuit

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P0480 - FAN 1 CONTROL CIRCUIT

Description:  This test checks the fan control-variable output circuit for the cooling fan clutch. The DTC is set when the powertrain control module (PCM) detects the voltage on the fan control-variable circuit is not within the expected range.
Possible Causes: 
  • Fan speed sensor (FSS) circuit
  • FSS PWRGND circuit open in the harness
  • FSS VPWR circuit open in the harness
  • Powertrain control module (PCM) (12A650)
Diagnostic Aids:  When an increase in fan speed for vehicle cooling is requested, the PCM monitors the FSS signal and outputs the required pulse width modulated (PWM) signal to a fluid port valve within the visctronic drive fan (VDF).
Application    Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST AH .
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