Normal Operation
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.
- 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.
- 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.
INCLUDE the tie rods and boots with the steering gear. SHIP the steering gear in the original box and packing foams to prevent steering gear damage.
REFER to GSBs for return shipping packaging instructions.The condition causing the DTC is not present at this time.