Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information BCM-U1A1400

Condition
The Brake control module (BCM) has software that continually monitors the control module's functions and components.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The software has not started.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition switch position II.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- ABS blocked.
- Stability control (SC) blocked.
- Traction control (TC) blocked.
- Active yaw control (AYC) is blocked.

Hint: Brake system, abbreviations Brake System, Abbreviations

Possible source
- Faulty software.

Note! This diagnostic trouble code (DTC) is not due to an internal hardware fault in the Brake control module (BCM) and must not be remedied by replacing the control module.

Fault symptom[s]
- ABS warning light on
- Brake circuit warning light on
- Anti-spin warning lamp lit
- Stability function is not working
- Traction control not working
- Anti skid function is not working
- Adaptive cruise control; No Functionality
- Collision avoidance driver support; No Functionality
- Electrical parking brake; Reduced Functionality
- Front monitoring/Active safety/City Safety does not work