Normal Operation

The SASM broadcasts the absolute steering angle value to the PSCM over the HS-CAN at predefined intervals during every drive cycle from the first ignition ON status. During normal operation the absolute steering angle from the SASM is compared against a steering angle derived from the rear wheel speed values broadcast by the ABS module over the HS-CAN and an angle derived from the EPAS motor position. If the absolute steering angle values and the derived steering angles do not match, the EPAS system is set to a default level of assistance.

1. U1: CHECK FOR SASM DTCS 
   • Ignition ON, engine OFF.
   • Retrieve the continuous memory DTCs.
   • Are any SASM DTCs present? 

     Yes	No
     REFER to Anti-Lock Brake System (ABS) and Stability Control article to diagnose the SASM concern.	GO to  U2.

2. U2: CHECK THE SASM FOR CORRECT INSTALLATION 
   • Check the SASM for correct installation.
   • Make sure that the steering wheel is set to the straight ahead position.
   • Access the PSCM and monitor the SW_ANGLE (ANGL) PID.
   • Is the angle between -4 deg - 4 deg? 

     Yes	No
     The condition to set the DTC is not present at this time. CLEAR the DTCs. TEST the system for normal operation. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.	VERIFY the SASM is installed correctly. REFER to appropriate Anti-Lock Brake System (ABS) and Stability Control article.