U1714 – Transmission Control Module Communication Error

The ODBII code U1714 indicates a communication error between the Transmission Control Module (TCM) and other control modules in the vehicle, suggesting a potential issue with data transmission or connectivity.

The severity of ODBII code U1714 is moderate to severe.

Common Causes For: U1713 U1713: Transmission Control Module Communication Error

• Faulty Transmission Control Module (TCM)
• Damaged wiring or connectors
• Poor electrical connections
• Failed or malfunctioning engine control module (ECM)
• Software issues or bugs in the TCM
• Low transmission fluid levels
• Corroded or shorted circuits
• Faulty sensors related to transmission operation
• Issues with the vehicle’s battery or charging system
• Interference from aftermarket modifications or devices

Common misdiagnosis for U1714 U1714: Transmission Control Module Communication Error

• Faulty Transmission Control Module (TCM)
• Wiring or connector issues
• Faulty Engine Control Module (ECM)
• Transmission fluid issues
• Sensor malfunctions (e.g., speed sensors)
• Battery or charging system problems
• Software or firmware issues in the TCM or ECM
• Grounding issues in the electrical system

Common Troubleshooting Steps

The OBD-II code U1714 indicates a communication error between the Transmission Control Module (TCM) and other control modules in the vehicle. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Addressing other related codes may help resolve the U1714 code.
• Inspect Wiring and Connectors: **Visual Inspection: Check the wiring harness and connectors related to the TCM for any signs of damage, corrosion, or loose connections.
• **Repair or Replace: Repair any damaged wires or connectors and ensure all connections are secure.
• Check Power and Ground: **Power Supply: Verify that the TCM is receiving the correct voltage. Use a multimeter to check the power supply to the TCM.
• **Ground Connections: Ensure that the ground connections for the TCM are clean and secure.
• Inspect the TCM: **Physical Condition: Check the TCM for any signs of physical damage or water intrusion.
• **Reprogramming: If the TCM is suspected to be faulty, consider reprogramming or updating the software if applicable.
• Check for Communication Issues: **CAN Bus: Inspect the Controller Area Network (CAN) bus for any faults. Use a scan tool to monitor communication between modules.
• **Termination Resistors: Ensure that the CAN bus termination resistors are present and functioning correctly.
• Test the TCM: If possible, test the TCM in another vehicle of the same make and model to determine if the module is functioning correctly.
• Clear Codes and Test Drive: After performing the above checks 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): Check for any manufacturer-specific TSBs related to the U1714 code or TCM communication issues. There may be known fixes or updates available.
• Seek Professional Help: If the issue persists after performing the above steps, consider consulting a professional mechanic or dealership for further diagnosis and repair.Conclusion Troubleshooting a U1714 code involves a systematic approach to check for wiring issues, power supply, ground connections, and the functionality of the TCM itself. Following these steps can help identify and resolve the communication error effectively.