Normal Operation

WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

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.

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 to diagnose the SASM concern.	Go to U2.

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. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. CLEAR the DTCs. REPEAT the self-test.	VERIFY the SASM is installed correctly. REFER to Anti-Lock Brake System (ABS) And Stability Control .