Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Possible Causes
2021 Ford Edge SE, 4WDSECTION Possible Causes
WARNING: This page is about a different car, the 2020 Ford F-150. 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 the Multifunction Electronic Modules article.Go to P2.
- Ignition ON, engine OFF.
- 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.
- SASM connector disconnected.
- Inspect the SASM connector (if not previously 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 the Anti-Lock Brake System (ABS) and Stability Control article.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.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.