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HOMESERVICE MANUALSFORD2021EXPLORER XLT, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 494 (EPAS GUIDED ROUTINE)PINPOINT TESTSPINPOINT TESTS Z: PSCM DTC U0300 INTERNAL CONTROL MODULE SOFTWARE INCOMPATIBILITYNORMAL OPERATION
2021 Ford Explorer XLT, RWD

Normal Operation

2021 Ford Explorer XLT, RWDSECTION Normal Operation
WARNING: This page is about a different car, the 2020 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The PSCM runs a self test when the ignition is set to ON and the module is receiving at least 6 volts. The self test compares the software in the module to the steering gear hardware. If the 2 items are not compatible, the EPAS enters manual mode and sends a request to the IPC message center to alert the vehicle occupants and sends an EPAS _FAILURE message to other modules on the HS-CAN.

  1. Z1: REFLASH AND VERIFY THE PSCM DTC 
    • Using a diagnostic scan tool, make sure the PSCM is programmed (flashed) to the latest level of software. Follow all diagnostic scan tool instructions.
    • Clear the PSCM DTCs.
    • Ignition OFF.
    • Wait at least 90 seconds for the modules to completely shut off.
    • Ignition ON, engine OFF.
    • Retrieve the continuous memory DTCs.
    • Does the DTC return? 
      Yes No
      INSTALL a new EPAS gear.
      CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA.
      If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
      If no service articles address this concern, INSTALL a new EPAS gear. REFER to the Power Steering article. ORDER a replacement PSCM and INCLUDE the RVC on the form.
      If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.      		 The condition causing the DTC is not present at this time.
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  • • You are missing required tools, torque specs, or safe lifting equipment.
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