U2195 – SCP (J1850) Invalid Data from SCLM

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The ODBII code U2195 SCP (J1850) Invalid Data from SCLM indicates that the vehicle’s communication network has received invalid or corrupted data from the Steering Column Lock Module (SCLM).

The severity of ODBII code U2195 SCP (J1850) Invalid Data from SCLM is moderate.

Common Causes For: U2194 U2194: Body Control Module Communication Error

  • Faulty SCLM (Smart Junction Box)
  • Poor or damaged wiring/connectors
  • Corrupted data communication
  • Malfunctioning modules in the SCP network
  • Low battery voltage
  • Interference from aftermarket accessories
  • Software issues or programming errors

Common misdiagnosis for U2195 SCP (J1850) Invalid Data from SCLM

  • Faulty wiring or connectors
  • Malfunctioning body control module (BCM)
  • Defective instrument cluster
  • Issues with the communication network
  • Problems with the powertrain control module (PCM)
  • Incorrectly diagnosed sensor failures
  • Battery or charging system issues
  • Software or firmware glitches in modules

Common Troubleshooting Steps

The OBD-II code U2195 indicates that there is an issue with the communication between the vehicle’s modules, specifically related to the Smart Junction Box (SJB) or the Smart Control Link Module (SCLM) in vehicles that use the SCP (Standard Corporate Protocol) communication protocol, such as those using the J1850 protocol. Here are some common troubleshooting steps to diagnose and resolve this issue:

  • Check for Additional Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing related codes can help in diagnosing the root cause.
  • Inspect Wiring and Connectors: Visually inspect the wiring and connectors related to the SCLM and SJB. Look for signs of damage, corrosion, or loose connections.
  • Pay special attention to the ground connections, as poor grounding can lead to communication issues.
  • Check for Short Circuits: Use a multimeter to check for short circuits in the wiring harness. Ensure that there are no unintended connections between wires that could cause communication errors.
  • Test the SCLM and SJB: If possible, test the SCLM and SJB for proper operation. This may involve using a scan tool to monitor data and see if the modules are responding correctly.
  • If you have access to a known good module, consider swapping it to see if the issue resolves.
  • Inspect the Vehicle Battery and Charging System: Ensure that the vehicle’s battery is in good condition and fully charged. A weak battery can cause communication issues.
  • Check the charging system to ensure it is functioning properly.
  • Check for Software Updates: Verify if there are any software updates available for the vehicle’s modules. Sometimes, manufacturers release updates to fix known communication issues.
  • Clear Codes and Test Drive: After performing inspections and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
  • Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the U2195 code or the SCLM/SJB for your specific vehicle make and model. Manufacturers may have specific recommendations for addressing this issue.
  • Professional Diagnosis: If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized tools and knowledge to diagnose complex communication issues. By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U2195 code.

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