Battery Energy Control Module (BECM) Repair Service

For Volvo Hybrid & Electric models with 400V Li-Ion high-voltage battery systems

The Battery Energy Control Module (BECM) is located inside the 400V high-voltage Li-Ion battery pack and is responsible for complete battery management, safety control, and communication with the vehicle’s propulsion and charging systems.

This listing is for a professional repair service focused on fixing no communication and control faults within the BECM.

BECM Main Responsibilities

• State of Charge (SoC) calculation and power limits
• Charging control during plug-in mode
• High-voltage battery temperature regulation
• Connection and disconnection of the HV battery
• Monitoring of cell voltage and temperature
• Monitoring of HV contactors
• Crash disconnect via direct link to SRS

Typical Fault Symptoms

• No communication with BECM on diagnostics
• Vehicle will not start or go into READY mode
• High-voltage system disabled
• Charging not possible
• Hybrid / EV fault messages on dashboard
• Contactor control or safety isolation faults

Diagnostics & Communication

The BECM features a built-in diagnostic system that continuously monitors internal operation, input/output signals, and safety systems. It operates as:

• CAN bus slave
• LIN bus master
• Directly linked to the SRS module for crash isolation

Our repair service targets internal electronic failures causing loss of communication, safety shutdowns, and control faults.

Important Service Information

• The vehicle will be immobilised while the BECM is removed.
• The BECM is part of the 400V high-voltage system and is directly connected to:
  • High-Voltage Battery Pack
  • Onboard Charger (OBC)
  • Inverter / Drive Modules
  • Supplemental Restraint System (SRS)
• All work requires high-voltage isolation, safety equipment, and controlled procedures.
• Only certified high-voltage technicians are legally permitted to service these systems.

All repairs are carried out using OEM-grade tools, approved VIDA diagnostic procedures, and within controlled high-voltage safety zones.

➤ Click here to find our contact details or arrange BECM repair