U1113 – Lost Communication with Vehicle Dynamics Control Module.

The ODBII code U1113 indicates that there is a loss of communication between the vehicle’s control module and the Vehicle Dynamics Control Module, which may affect the vehicle’s stability and handling systems.

The severity of ODBII code U1113 is generally considered moderate to severe.

Common Causes For: U1112 SCP (J1850) Invalid or Missing Data for Primary Id

• Faulty Vehicle Dynamics Control Module (VDCM)
• Damaged or corroded wiring or connectors
• Poor ground connection
• Faulty communication network (CAN bus issues)
• Malfunctioning power supply to the VDCM
• Software or firmware issues in the VDCM
• Other related module failures affecting communication

Common misdiagnosis for U1113 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 brake control module
• Software or firmware issues in the control modules

Common Troubleshooting Steps

When dealing with the OBD-II code U1113, 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 Additional Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues.
• Inspect the Wiring and Connectors: **Visual Inspection: Check the wiring harness and connectors associated with 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: If possible, check the condition of the VDCM itself. Look for any signs of physical damage or water intrusion.
• **Reprogramming: In some cases, the module may need to be reprogrammed or updated with the latest software.
• Check for Communication Issues: **CAN Bus Communication: The VDCM communicates over the CAN bus. Use a scan tool to check if other modules are communicating properly. If other modules are also showing communication issues, it may indicate a problem with the CAN bus itself.
• **Termination Resistors: Ensure that the CAN bus termination resistors are present and functioning correctly.
• Perform a Hard Reset: Disconnect the vehicle’s battery for a few minutes to reset the vehicle’s electronic systems. Reconnect the battery and see if the code reappears.
• Test the VDCM: If you have access to a compatible scan tool, you can perform a functional test of the VDCM to see if it responds to commands.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the U1113 code or the VDCM for your specific vehicle make and model. Manufacturers may have specific fixes or updates for known issues.
• Seek Professional Help: If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s systems.Conclusion Troubleshooting the U1113 code involves a systematic approach to check for communication issues, inspect wiring and connections, and verify the functionality of the Vehicle Dynamics Control Module. Always refer to the vehicle’s service manual for specific procedures and specifications related to your vehicle.