U1532 – Module Communication Failure

The ODBII code U1532 indicates a “Module Communication Failure,” meaning there is a problem with communication between vehicle modules, often due to a wiring issue, a faulty module, or a network problem.

The severity of ODBII code U1532 is moderate.

Common Causes For: U1531 U1531: “Module Communication Failure”

• Faulty wiring or connectors
• Failed or malfunctioning module
• Corrupted software or firmware in the module
• Poor ground connections
• Interference from aftermarket devices
• Low battery voltage or weak battery
• Communication network issues (e.g., CAN bus problems)
• Water intrusion or damage to the module

Common misdiagnosis for U1532 U1532: “Module Communication Failure”

• Faulty wiring or connectors
• Defective control module
• Software issues or updates needed
• Battery or power supply problems
• Grounding issues
• Intermittent communication issues
• Other unrelated module failures

Common Troubleshooting Steps

The OBD-II code U1532 indicates a “Module Communication Failure,” which typically means that there is a communication issue 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 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 affected module(s). Look for signs of damage, corrosion, or loose connections.
• Pay special attention to ground connections, as poor grounding can lead to communication issues.
• Check Power Supply: Ensure that the affected module is receiving the proper voltage and ground. Use a multimeter to check the power and ground circuits.
• Test the Module: If possible, test the affected module to see if it is functioning correctly. This may involve using specialized diagnostic tools or swapping the module with a known good one.
• Check for Intermittent Issues: Sometimes, communication failures can be intermittent. Wiggle the wiring harnesses and connectors while monitoring the scanner for changes in the code status.
• Inspect the CAN Bus: If the vehicle uses a Controller Area Network (CAN) bus for communication, check the integrity of the bus. Look for short circuits, open circuits, or any other issues that could disrupt communication.
• Update Software/Firmware: Check if there are any software or firmware updates available for the vehicle’s modules. Sometimes, communication issues can be resolved with an update.
• 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 Service Manual: Refer to the vehicle’s service manual for specific diagnostic procedures related to the U1532 code and the affected module(s).
• 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 the specific make and model of the vehicle. By following these steps, you can systematically diagnose and potentially resolve the U1532 code and the associated communication failure.