U1610 – CAN Communication Bus Fault.

The ODBII code U1610 indicates a fault in the CAN (Controller Area Network) communication bus, suggesting a communication issue between modules in the vehicle’s network.

The severity of ODBII code U1610 CAN Communication Bus Fault is generally considered moderate to severe.

Common Causes For: U1607 refers to a communication issue between the engine control module (ECM) and the transmission control module (TCM).

• Faulty CAN bus wiring or connectors
• Malfunctioning CAN bus module
• Short circuit in the CAN bus
• Open circuit in the CAN bus
• Interference from other electrical components
• Faulty or incompatible electronic control units (ECUs)
• Poor ground connections
• Corroded or damaged connectors
• Software issues or bugs in the ECU
• Low battery voltage or power supply issues

Common misdiagnosis for U1610 CAN Communication Bus Fault.

• Faulty Engine Control Module (ECM)
• Faulty Transmission Control Module (TCM)
• Bad wiring or connectors
• Faulty Body Control Module (BCM)
• Defective sensors
• Battery or charging system issues
• Faulty CAN bus termination resistors
• Software or firmware issues in modules
• Grounding issues
• Intermittent electrical connections

Common Troubleshooting Steps

The OBD-II code U1610 indicates a CAN (Controller Area Network) communication bus fault. This code typically means that there is a problem with the communication between the various modules in the vehicle. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Check for Additional 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:
• Visually inspect the wiring and connectors associated with the CAN bus. Look for any signs of damage, corrosion, or loose connections.
• Pay special attention to the connectors on the ECM (Engine Control Module) and other modules that communicate over the CAN bus.
• Check for Short Circuits:
• Use a multimeter to check for short circuits in the CAN bus wiring. Measure the resistance between the CAN High and CAN Low wires; it should be around 60 ohms when terminated correctly.
• Check for shorts to ground or power in the CAN bus wiring.
• Test the CAN Bus Voltage:
• With the ignition on (engine off), measure the voltage on the CAN High and CAN Low wires. The typical voltage levels should be around 2.5V to 2.8V for both lines.
• If the voltage is significantly off, it may indicate a problem with the bus or a module.
• Check Termination Resistors:
• Ensure that the CAN bus has the correct termination resistors (typically 120 ohms) at both ends of the bus. A missing or faulty resistor can cause communication issues.
• Inspect Modules:
• Check the modules that are connected to the CAN bus. A faulty module can disrupt communication. If possible, test the modules individually or replace them with known good units to see if the issue resolves.
• Scan for Module Communication:
• Use a scan tool to check if all modules on the CAN bus are communicating properly. Some scan tools allow you to see live data from each module, which can help identify which module is not responding.
• Check for Interference:
• Look for any aftermarket devices or modifications that may interfere with the CAN bus communication, such as alarms, remote starters, or other electronic devices.
• Perform a Hard Reset:
• Disconnect the vehicle’s battery for a few minutes to reset the modules. Reconnect the battery and see if the code reappears.
• Consult Technical Service Bulletins (TSBs):
• Check for any manufacturer-specific TSBs related to the U1610 code or CAN bus issues for your vehicle make and model. 1
• Professional Diagnosis:
• If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with CAN bus systems and specialized diagnostic equipment. By following these steps, you should be able to identify and resolve the underlying issue causing the U1610 code.