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 communication concern
Incorrect BCM configuration

ZA1: CHECK THE SERVICE HISTORY

Check the service history for recent service actions related to the BCM.
Are any recent service actions with the BCM indicated?

Yes	No
Go to ZA3.	Go to ZA2.

ZA2: CHECK FOR COMMUNICATION DTCS

Ignition ON, engine OFF.
Carry out the ABS self-test.
Are any lost communication or invalid data DTCs present in the ABS module?

Yes	No
DIAGNOSE these DTCs before diagnosing DTC C0078:56. REFER to the ABS Module DTC Chart.	Go to ZA4.

ZA3: CONFIGURE THE BCM MODULE

Ignition ON, engine OFF.
Using a diagnostic scan tool, configure the BCM. Carry out the programming procedure as directed by the diagnostic scan tool.
Clear the ABS DTCs.
Ignition OFF.
Ignition ON, engine OFF.
Carry out the ABS self-test.
Is the DTC still present?

Yes	No
Go to ZA4.	The system is operating correctly. The concern was caused by an incomplete or improper programming session.

ZA4: CHECK FOR CORRECT BCM MODULE OPERATION

Ignition OFF.
Disconnect all BCM electrical connectors.
Using a good light source, inspect all electrical connectors for the following:
- corrosion - install new connector or terminal and clean the module pins
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
- spread terminals - install new terminals as necessary
Connect all BCM electrical connectors. Make sure the connectors seat and latch correctly.
Operate the system and determine if the concern is still present.
Is the concern still present?

Yes	No
INSTALL a new BCM. CHECK OASIS for any 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 BCM. REFER to MULTIFUNCTION ELECTRONIC MODULES . ORDER a replacement BCM and INCLUDE the RVC on the form. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.	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. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.

Yes

INSTALL a new BCM.
CHECK OASIS for any 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 BCM. REFER to MULTIFUNCTION ELECTRONIC MODULES .
ORDER a replacement BCM and INCLUDE the RVC on the form.
If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.

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.
If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.