Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHYUNDAI2017SONATA PLUG-IN HYBRIDREPAIR AND DIAGNOSISHYBRID/ELECTRIC POWERTRAINBATTERY MANAGEMENT SYSTEMSHIGH VOLTAGE BATTERY CONTROL SYSTEM (PHEV)
2017 Hyundai Sonata Plug-In Hybrid
High Voltage Battery Control System (PHEV)
2017 Hyundai Sonata Plug-In HybridSECTION High Voltage Battery Control System (PHEV)
- Description and Operation
- Specifications
- Components and Components Location
- Troubleshooting
- Schematic Diagrams
- BMS Ecu
- Components Location
- Schematic Diagrams
- BMS ECU Terminal And Input/Output Signal
- [Main BMS ECU Terminal And Input/Output Signal]
- Connector [B01-MD]
- Connector [B01-ME]
- Connector [B01-MF]
- Connector [B01-MT]
- Connector [B01-MA]
- Connector [B01-MB]
- [Sub BMS ECU Terminal And Input/Output Signal]
- Connector [B01-SD]
- Connector [B01-SE]
- Connector [B01-SF]
- Connector [B01-ST]
- Connector [B01-SA]
- Connector [B01-SB]
- Circuit Diagram
- BMS ECU Terminal And Input/Output Signal
- Repair Procedures
- Safety Plug
- Main Relay
- Pre Charge Relay
- Pre-Charge Resistor
- Battery Current Sensor
- Main Fuse
- Battery Temperature Sensor
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.