WOMS
U code network Medium severity

U1153 SCP (J1850) Invalid or Missing Data for Experimental #3

The OBD2 code U1153 SCP (J1850) indicates that there is invalid or missing data from the vehicle's communication network, specifically related to Experimental #3, which may refer to a specific data parameter or module...

Definition

The OBD2 code U1153 SCP (J1850) indicates that there is invalid or missing data from the vehicle's communication network, specifically related to Experimental #3, which may refer to a specific data parameter or module that is not functioning correctly

Common causes

  • Faulty or damaged wiring/connectors
  • Malfunctioning control modules
  • Poor ground connections
  • Interference from aftermarket devices
  • Corrupted data communication
  • Software issues in the control modules
  • Low battery voltage or power supply issues
  • Faulty sensors or actuators

Common misdiagnoses

  • Faulty ABS module
  • Malfunctioning body control module (BCM)
  • Defective instrument cluster
  • Wiring issues or shorts
  • Faulty communication lines
  • Bad ground connections
  • Incorrectly programmed modules
  • Failed or weak battery
  • Corrupted software in control modules
  • Sensor failures (e.g., wheel speed sensors)

Troubleshooting steps

  1. 1. Check for Other Codes

    Start by scanning the vehicle for any other diagnostic trouble codes (DTCs). Other codes may provide additional context or point to the root cause of the issue

  2. 2. Inspect Wiring and Connectors

    Examine the wiring and connectors associated with the affected modules. Look for signs of damage, corrosion, or loose connections. Pay special attention to the wiring harnesses that connect to the modules involved in the SCP network

  3. 3. Check Module Functionality

    Identify the specific module that is reporting the U1153 code. Use a scan tool to check if the module is functioning correctly. If the module is not responding or is malfunctioning, it may need to be repaired or replaced

  4. 4. Test the SCP Network

    Use a multimeter or an oscilloscope to test the SCP communication lines for proper voltage and signal integrity. Check for short circuits, open circuits, or noise on the communication lines

  5. 5. Inspect Ground Connections

    Ensure that all ground connections for the affected modules are secure and free of corrosion. Poor ground connections can lead to communication issues

  6. 6. Check for Software Updates

    Sometimes, communication issues can be resolved with a software update. Check with the manufacturer or a dealership to see if there are any available updates for the vehicle's control modules

  7. 7. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the DTCs using a scan tool and take the vehicle for a test drive. Monitor the system to see if the code reappears

  8. 8. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U1153 code or the specific vehicle model. Manufacturers often release TSBs that provide guidance on known issues and fixes

  9. 9. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional technician or a dealership with experience in diagnosing communication issues. By following these troubleshooting steps, you should be able to identify and resolve the underlying issue causing the U1153 code