WOMS
U code network High severity

U1960 Lost Communication with the Body Control Module (BCM)

The OBD2 code U1960 indicates that there is a loss of communication between the vehicle's diagnostic system and the Body Control Module (BCM), which may affect various electrical functions and systems in the vehicle

Definition

The OBD2 code U1960 indicates that there is a loss of communication between the vehicle's diagnostic system and the Body Control Module (BCM), which may affect various electrical functions and systems in the vehicle

Common causes

  • Faulty Body Control Module (BCM)
  • Damaged wiring or connectors
  • Corroded terminals
  • Blown fuses
  • Faulty communication network (CAN bus issues)
  • Low battery voltage
  • Intermittent electrical connections
  • Software issues or programming errors

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Wiring issues or damaged connectors
  • Faulty or corroded ground connections
  • Malfunctioning power supply to the BCM
  • Issues with other control modules
  • Software or firmware issues
  • Faulty ignition switch
  • Battery or charging system problems

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes. Other codes may provide more context or indicate related issues

  2. 2. Inspect the Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors leading to the BCM for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent, corroded, or pushed back

  4. 4. Check Power and Ground

    Power Supply: Verify that the BCM is receiving the correct voltage. Use a multimeter to check the power supply at the BCM connector

  5. 5. Ground Connections

    Ensure that the ground connections for the BCM are secure and free of corrosion

  6. 6. Inspect the BCM

    Physical Condition: Check the BCM for any signs of physical damage or water intrusion

  7. 7. Reprogramming

    If the BCM has been replaced, ensure that it has been properly programmed to the vehicle

  8. 8. Check for Communication Issues

    CAN Bus: The BCM communicates over the Controller Area Network (CAN) bus. Use a scan tool to check for communication with other modules. If other modules are also not communicating, there may be a problem with the CAN bus wiring or a fault in another module

  9. 9. Termination Resistors

    Ensure that the CAN bus has the proper termination resistors in place

  10. 10. Test the BCM

    If possible, test the BCM in another vehicle of the same make and model to determine if the module itself is faulty

  11. 11. Check for Software Updates

    Check if there are any software updates available for the BCM or the vehicle’s control modules. Sometimes, manufacturers release updates to fix communication issues

  12. 12. Inspect Related Components

    Check other components that may interact with the BCM, such as switches, sensors, and other control modules, to ensure they are functioning correctly

  13. 13. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  14. 14. Consult a Professional

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with the specific vehicle make and model. By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U1960 code