U1689 – Invalid Data Received from Vehicle Control Module.

The ODBII code U1689 indicates that the vehicle’s control module has received invalid or corrupted data from another control module, leading to communication issues within the vehicle’s network.

The severity of ODBII code U1689 is generally considered moderate.

Common Causes For: U1688 Invalid Data Received from Body Control Module (BCM).

• Faulty Vehicle Control Module (VCM)
• Corrupted or damaged wiring harness
• Poor electrical connections or grounds
• Faulty communication lines (CAN bus issues)
• Software or firmware issues in the VCM
• Malfunctioning sensors or actuators
• Interference from aftermarket devices or modifications
• Low battery voltage or power supply issues

Common misdiagnosis for U1689 Invalid Data Received from Vehicle Control Module.

• Faulty Vehicle Control Module (VCM)
• Wiring issues or shorts in the communication lines
• Faulty sensors or actuators
• Corrupted software or firmware in the control modules
• Issues with the OBDII connector or communication port
• Problems with other control modules affecting communication
• Battery or power supply issues affecting module operation

Common Troubleshooting Steps

The OBD-II code U1689 indicates that there is an issue with the communication between the vehicle’s control modules, specifically that invalid data has been received from a vehicle control module. 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 other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue.
• Inspect Wiring and Connectors:
• Check the wiring and connectors related to the control modules for any signs of damage, corrosion, or loose connections.
• Pay special attention to the wiring harnesses that connect the modules, as these can be prone to wear and tear.
• Verify Power and Ground:
• Ensure that the control module in question is receiving the proper power and ground. Use a multimeter to check voltage and ground connections.
• If there are issues with power or ground, trace the wiring back to the source to identify any faults.
• Check for Communication Issues:
• Use a scan tool to monitor communication between the control modules. Look for any interruptions or failures in communication.
• If possible, check the data bus (CAN bus) for proper operation. You may need a specialized tool for this.
• Inspect the Control Module:
• If the wiring and connections are good, the control module itself may be faulty. Inspect the module for any physical damage or signs of water intrusion.
• If you have access to a known good module, consider swapping it out to see if the issue resolves.
• Update Software/Firmware:
• Check if there are any software or firmware updates available for the control module. Sometimes, manufacturers release updates to fix known issues.
• Clear Codes and Test Drive:
• After performing any repairs or inspections, clear the trouble codes 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 U1689 code for your specific vehicle make and model. Manufacturers may have specific recommendations or known issues that can help in troubleshooting.
• Professional Diagnosis:
• 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 specific systems. By following these steps, you should be able to identify and resolve the issue related to the U1689 code.