U1130 – Lost Communication with Vehicle Dynamics Control Module.

The ODBII code U1130 indicates that there is a loss of communication between the vehicle’s onboard computer and the Vehicle Dynamics Control Module, which may affect systems like traction control and stability control.

The severity of ODBII code U1130 is generally considered moderate to severe.

Common Causes For: U1129 SCP (J1850) Invalid or Missing Data for Primary Id

• Faulty Vehicle Dynamics Control Module (VDCM)
• Damaged wiring or connectors
• Poor ground connection
• Faulty communication network (CAN bus issues)
• Corroded or loose connectors
• Malfunctioning other control modules
• Software issues or updates needed
• Battery or power supply problems

Common misdiagnosis for U1130 Lost Communication with Vehicle Dynamics Control Module.

• Faulty ABS module
• Wiring issues or shorts
• Bad wheel speed sensors
• Faulty engine control module (ECM)
• Incorrectly diagnosed transmission issues
• Power supply problems
• Faulty body control module (BCM)
• Software or calibration issues

Common Troubleshooting Steps

When dealing with the OBD-II code U1130, which indicates “Lost Communication with Vehicle Dynamics Control Module,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Sometimes, other codes can provide context or indicate related issues.
• Inspect the Wiring and Connectors: **Visual Inspection: Check the wiring harness and connectors related to the Vehicle Dynamics Control Module (VDCM) for any signs of damage, corrosion, or loose connections.
• **Connector Pins: Ensure that the pins in the connectors are not bent, corroded, or damaged.
• Check Power and Ground: **Power Supply: Verify that the VDCM is receiving the correct voltage. Use a multimeter to check the power supply to the module.
• **Ground Connection: Ensure that the ground connection for the VDCM is secure and functioning properly.
• Inspect the Vehicle Dynamics Control Module: **Module Condition: Check the VDCM for any physical damage or signs of failure.
• **Reprogramming: If applicable, consider reprogramming or updating the module’s software, as a software glitch can sometimes cause communication issues.
• Check for Communication Issues: **CAN Bus Integrity: Inspect the Controller Area Network (CAN) bus for continuity and proper termination. Use a multimeter or oscilloscope to check for signal integrity.
• **Other Modules: Ensure that other modules on the CAN bus are functioning correctly, as a fault in one module can affect communication with others.
• Perform a Hard Reset: Disconnect the vehicle’s battery for a few minutes to reset the vehicle’s computer systems. Reconnect and see if the code reappears.
• Test the VDCM: If you have access to diagnostic tools, perform a functional test of the VDCM to ensure it is operating correctly.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the U1130 code or the specific vehicle make and model. Manufacturers may have known issues and recommended fixes.
• Seek Professional Help: If the issue persists after performing the above steps, consider consulting a professional mechanic or dealership with experience in diagnosing and repairing communication issues in vehicle control modules.
• Document Findings: Keep a record of any tests performed, codes retrieved, and repairs made. This documentation can be helpful for future reference or if professional assistance is needed. By following these steps, you should be able to identify the root cause of the U1130 code and take appropriate action to resolve the issue.