Possible Causes

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

Network concern
BCM configuration concern
SASM

P1: CHECK THE SASM AND BCM DTCS

Ignition ON, engine OFF.
Carry out the SASM self-test.
Carry out the BdyCM self-test.
Are any communication or module internal failure DTCs present?

Yes	No
For the SASM, REFER to the SASM DTC Chart. For the BCM, REFER to MULTIFUNCTION ELECTRONIC MODULES .	Go to P2.

P2: RECHECK FOR SASM DTC U0300:00

Clear the SASM DTCs.
Ignition OFF.
Ignition ON, engine OFF.
Carry out the SASM self-test.
Is DTC U0300:00 still present?

Yes	No
Go to P3.	The concern was caused by the installation of a new BCM. The repair is complete.

P3: PROGRAM THE BCM

Using a diagnostic scan tool, carry out the PMI for the BCM using as-built data.
Ignition OFF.
Ignition ON, engine OFF.
Carry out the SASM self-test.
Is DTC U0300:00 still present?

Yes	No
Go to P4.	The concern was caused by a incomplete or improperly programmed BCM, the repair is complete.

P4: CHECK FOR CORRECT SASM OPERATION

Ignition OFF.
SCCM_A connector disconnected.
Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
SASM connector connected. Make sure the connector seats and latches correctly.
Operate the system and determine if the concern is still present.
Is the concern still present?

Yes	No
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 SASM. Refer to Anti-Lock Brake System (ABS) and Stability Control .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.