U1354 – Control Module Communication Failure

The ODBII code U1354 indicates a “Control Module Communication Failure,” meaning there is a problem with communication between the vehicle’s control modules, which can affect various systems and functions.

Moderate.

Common Causes For: U1353 Manufacturer Specific” code, which typically indicates a communication issue between modules in the vehicle’s network.

• Faulty control module
• Poor electrical connections
• Damaged wiring harness
• Corroded connectors
• Software issues or bugs
• Low battery voltage
• Faulty or malfunctioning sensors
• Interference from aftermarket devices
• Grounding issues
• Communication network failure (CAN bus issues)

Common misdiagnosis for U1354 U1354: “Control Module Communication Failure”

• Faulty control module
• Wiring issues
• Poor ground connections
• Corrupted software/firmware
• Faulty sensors
• Battery or power supply problems
• Intermittent connection issues
• Communication network faults (CAN bus issues)

Common Troubleshooting Steps

The OBD-II code U1354 indicates a “Control Module Communication Failure.” This code typically suggests that there is a problem with communication between the vehicle’s control modules. 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. Sometimes, other codes can provide more context about the issue.
• Inspect Wiring and Connectors:
• Visually inspect the wiring and connectors associated with the control modules. Look for 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.
• Check Power and Ground:
• Ensure that the control modules are receiving the proper power and ground. Use a multimeter to check voltage and ground continuity at the module connectors.
• If there is no power or ground, trace the wiring back to the source to identify any breaks or shorts.
• Test Control Modules:
• If you suspect a specific control module is faulty, you can test it by swapping it with a known good module (if available) or using a diagnostic tool to perform module-specific tests.
• Some modules may have self-diagnostic capabilities that can provide additional information.
• Check for Communication:
• Use a scan tool to check if you can communicate with all control modules. If some modules are unresponsive, it may indicate a communication issue.
• Verify that the communication protocols (e.g., CAN, LIN) are functioning correctly.
• Inspect the CAN Bus:
• If your vehicle uses a Controller Area Network (CAN) bus, check for issues on the bus. Look for short circuits, open circuits, or excessive resistance.
• You can use an oscilloscope to monitor the CAN signals for proper voltage levels and signal integrity.
• Update or Reprogram Modules:
• In some cases, a software update or reprogramming of the control modules may be necessary to resolve communication issues. Check with the manufacturer for any available updates.
• Clear Codes and Test Drive:
• After performing any repairs or adjustments, 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 TSBs related to your vehicle make and model that may address known issues with control module communication.
• Seek Professional Help:
• If you are unable to resolve the issue after following these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle. By following these troubleshooting steps, you can systematically identify and address the underlying cause of the U1354 code.