Download 2025 Sonata Hybrid Factory Repair Manual – HV Battery, Electric Motor & GDI Diagnostics

2025 Hyundai Sonata Hybrid Factory Repair Manual – Complete Service Resource for Hybrid Powertrain, Electrical & Engine Systems (PDF/USB)

Unlock professional-level maintenance for your 2025 Hyundai Sonata Hybrid with this factory-authorized service manual, designed to cover every detail of your vehicle’s hybrid drivetrain, gasoline-electric integration, and digital systems. Whether you’re a shop technician or an experienced DIYer, this guide delivers the step-by-step detail you need to handle high-voltage repairs, engine diagnostics, and hybrid battery maintenance with confidence.

This is the same repair information used by Hyundai dealership service teams—now available for your own garage in convenient PDF download or USB flash drive formats.

🔧 Full-Service Coverage for the 2025 Sonata Hybrid

Get comprehensive support for the Smartstream 2.0L GDI hybrid engine, advanced electric motor drive, and hybrid transmission systems:

• Hybrid battery testing, including cell health analysis, cooling fan service, and module replacement

• Inverter and converter diagnostics, coolant bleeding procedures, and electrical fault tracing

• Power control module (PCM) and hybrid control unit (HCU) programming and scan tool diagnostics

• Start-stop system servicing, EV mode transitions, and regenerative braking tuning

• Full breakdown of electric motor clutch function, planetary gearset service, and eCVT calibration

All high-voltage repair procedures include technician safety instructions and proper PPE guidelines.

⚙️ Gasoline Engine & Transmission Maintenance

This manual also includes detailed coverage for traditional mechanical systems paired with hybrid components:

• GDI fuel system diagnostics, rail pressure testing, and fuel injector cleaning

• Valve cover and timing chain procedures, including VVT inspection and sensor resets

• Cooling system service, including hybrid heater loop isolation and thermostat replacement

• Hybrid 6-speed automatic transmission fluid exchange, shift solenoid checks, and torque converter service

• Full torque specs, bolt patterns, and reassembly diagrams for accurate mechanical repair

Perfect for technicians managing both ICE and hybrid repairs in one session.

🔋 Electrical & HV Circuit Diagrams

Gain full access to Hyundai’s complete electrical schematics and wiring layouts:

• High-resolution hybrid wiring diagrams, including CAN bus layout, sensor pinouts, and junction box locations

• Diagnostic flowcharts for electric system faults, relay mapping, and ground circuit testing

• Battery Management System (BMS) logic guides and HV insulation resistance test procedures

• TPMS, smart key, ADAS, and lighting system diagnostics included

• Hybrid cooling fan motor, inverter controller, and charging circuit troubleshooting step-by-step

Find faults fast and repair safely with OEM-verified electrical procedures.

🛞 Brakes, Chassis & Advanced Driver Assist (ADAS)

The 2025 Sonata Hybrid includes integrated digital and mechanical subsystems—this manual helps maintain them:

• Regenerative braking control unit service, blended braking system diagnosis, and brake booster calibration

• Electronic Parking Brake (EPB) reset, ABS/ESC diagnostics, and fluid flushing with scan tool assist

• Suspension repair, shock and bushing replacement, and wheel alignment specs

• ADAS system calibration including lane keep assist, forward collision avoidance, and blind spot monitoring

• Troubleshooting for electric power steering (EPS) and steering angle sensor recalibration

Maintain hybrid safety and ride comfort with factory-backed instructions.

✅ What You Get in This 2025 Sonata Hybrid Manual

• Genuine OEM procedures and technical illustrations

• Includes full hybrid system coverage, plus gasoline engine and electrical diagrams

• Works with any scan tool or diagnostic software compatible with Hyundai

• Ideal for dealer alternative shops, hybrid fleet maintenance, and technical schools

• Choose between instant PDF access or USB shipped directly to your location