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HOMESERVICE MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 579 (ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL)DIAGNOSIS AND TESTINGANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROLPINPOINT TESTSPINPOINT TEST T: SASM COMMUNICATION CONCERN WITH BCMNOTES
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD

Pinpoint Test T: SASM Communication Concern With BCM: Notes

2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Notes
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to MODULE COMMUNICATIONS NETWORK for schematic and connector information.

Normal Operation and Fault Conditions 

With the ignition ON, the BCM sends messages to the SASM over the HS-CAN. If the SASM does not receive these messages within the specified time frame, the module sets a DTC. This can be due to a BCM failure, a circuit failure on the HS-CAN or an excessive load on the network. For information on the cruise control messages sent to the SASM by the BCM, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Condition
SASM U0140:00 Lost Communication With Body Control Module: No Sub Type Information Sets when the SASM does not receive any messages from the BCM.
SASM U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information Sets if the SASM receives invalid data in the BCM personality message.

Possible Sources 

  • Wiring, terminals or connectors
  • Network communication concern
  • BCM
  • SASM
RENDER: 1.0x

NO RELATED

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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.