Subaru Subaru Legacy 2020-present Electrical Specifications
Explore the detailed electrical specifications for the 2020-Present Subaru Legacy, including battery capacity, alternator output, wiring diagrams, and fuse box layouts. Ideal for maintenance, troubleshooting, and upgrades.
Overview Specifications
This document provides detailed electrical specifications for the 2020-Present Subaru Legacy. It covers key components such as the battery, charging system, lighting, and infotainment. Use this guide to understand the vehicle's electrical architecture, troubleshoot issues, or identify compatible upgrades. The document is organized into sections for easy navigation, with quick-reference tables for key specifications.
How to Use
Use the search bar to find specific terms or components. Enter keywords like 'battery' or 'infotainment' to quickly locate relevant sections.
Scroll through the sections or use the table of contents to jump to specific topics. Each section is divided into subsections for detailed information.
Key Specifications
Battery Voltage
12 V
Alternator Output
130 A
Headlight Wattage
55 W
Infotainment Display Size
11.6 in
Audio System Output
432 W (Harman Kardon)
Available Specifications
Battery and Charging System
This section covers the electrical specifications of the battery and charging system, including voltage, capacity, and alternator output. It also includes details on maintenance and troubleshooting tips.
Battery and Charging System
This section covers the electrical specifications of the battery and charging system, including voltage, capacity, and alternator output. It also includes details on maintenance and troubleshooting tips.
Battery Specifications
- 12-volt lead-acid battery
- Capacity: 48 Ah
- Cold Cranking Amps (CCA): 550 A
- Maintenance-free design
- Battery life: 3-5 years under normal conditions
- Optional AGM battery upgrade available
Charging System
- Alternator output: 130 A
- Voltage regulator integrated into alternator
- Automatic voltage control for stable output
- Charging time: 4-6 hours for full charge
- Compatible with regenerative braking systems
Lighting System
This section details the lighting system, including headlights, taillights, and interior lighting. It covers bulb types, wattage, and advanced lighting technologies.
Lighting System
This section details the lighting system, including headlights, taillights, and interior lighting. It covers bulb types, wattage, and advanced lighting technologies.
Exterior Lighting
- LED headlights with auto-leveling
- High-beam assist for improved visibility
- LED daytime running lights (DRL)
- LED taillights with dynamic turn signals
- Fog lights: 55W halogen or optional LED
- Automatic headlight activation
Interior Lighting
- LED dome lights with dimming feature
- Ambient lighting with customizable colors
- Map lights: 5W LED
- Trunk light: 3W LED
- Automatic dimming rearview mirror
Infotainment and Connectivity
This section provides details on the infotainment system, including display specifications, audio output, and connectivity options such as Bluetooth and USB.
Infotainment and Connectivity
This section provides details on the infotainment system, including display specifications, audio output, and connectivity options such as Bluetooth and USB.
Infotainment Display
- 11.6-inch touchscreen display
- Resolution: 1280 x 720 pixels
- Capacitive touch with multi-touch support
- Anti-glare coating for better visibility
- Split-screen functionality
- Optional navigation system
Audio and Connectivity
- 6-speaker audio system standard
- Optional 12-speaker Harman Kardon system
- Bluetooth 5.0 with A2DP support
- USB-C ports: 2 front, 2 rear
- Wireless Apple CarPlay and Android Auto
- Wi-Fi hotspot capability
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Component Specifications
Overview
- Type
- 12V DC system
- Configuration
- Negative ground
- Platform
- Subaru Global Platform
- Material
- Copper wiring, aluminum connectors
- Location
- Distributed throughout vehicle
Dimensions
- Battery Length
- 10.5 in (26.67 cm)
- Battery Width
- 6.9 in (17.53 cm)
- Battery Height
- 7.5 in (19.05 cm)
- Alternator Diameter
- 5.1 in (12.95 cm)
- Alternator Length
- 6.3 in (16 cm)
- Wire Gauge
- 16 AWG to 4 AWG
- Fuse Box Dimensions
- 8.2 x 5.9 x 2.4 in (20.8 x 15 x 6.1 cm)
Materials
- Wiring
- Copper with PVC insulation
- Connectors
- Aluminum with corrosion-resistant coating
- Battery Case
- Polypropylene
- Alternator Housing
- Aluminum alloy
Features
- Lighting
-
- LED headlights
- Adaptive front lighting system
- LED daytime running lights
- Automatic high beams
- infotainment
-
- 11.6-inch touchscreen display
- Apple CarPlay integration
- Android Auto compatibility
- Harman Kardon premium audio system
- Safety
-
- EyeSight Driver Assist Technology
- Blind-spot detection
- Rear cross-traffic alert
- Lane departure warning
- Charging
-
- USB-A and USB-C ports
- Wireless charging pad
- 12V power outlet in front and rear
- Climate Control
-
- Dual-zone automatic climate control
- Rear seat vents
- Heated front and rear seats
- Heated steering wheel
Safety Features
- Circuit Protection
-
- Smart fuse system
- Overload protection
- Short-circuit protection
- Emergency
-
- Automatic hazard lights on impact
- Emergency battery disconnect
- Backup power for critical systems
- Visibility
-
- Automatic rain-sensing wipers
- Heated side mirrors
- LED fog lights
Comfort Features
- Lighting
-
- Ambient interior lighting
- Auto-dimming rearview mirror
- Illuminated vanity mirrors
- Convenience
-
- Keyless entry and start
- Power-adjustable driver's seat
- Memory settings for driver's seat
- Climate
-
- Remote engine start
- Windshield de-icer
- Rear window defroster
Accessories
- Lighting
-
- LED interior light kit
- Fog light kit
- Cargo area light
- Charging
-
- Rear seat USB charger
- Wireless charging pad
- 12V to USB adapter
- Audio
-
- Upgraded amplifier
- Subwoofer kit
- Satellite radio module
Maintenance
- Service interval
- Every 30,000 miles or 36 months
- Items
-
- Battery terminal cleaning
- Alternator belt inspection
- Fuse box inspection
- Wiring harness check
- Ground connection verification
- Notes
- Use only OEM replacement parts for electrical components
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Electrical components
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Electrical connectors
- Battery
- Miles: 36,000Years: 3Coverage: Replacement if defective
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Automated wiring harness assembly
- Robotic connector installation
- Precision battery testing
- Quality Control
- Testing: High-voltage stress testing, Vibration resistance testing, Temperature cycling testsCertifications: ISO 9001, ISO 14001, SAE J1128 compliance
- Sustainability Practices
-
- Recyclable wiring materials
- Lead-free solder
- Energy-efficient production
- Production Metrics
- Daily Output: 1200 unitsDefect Rate: 0.02%Energy Consumption: 15 kWh per vehicle
Service Information for electrical Service
Maintenance and service requirements specific to electrical components
- Inspect battery terminals and cables
- Check alternator output
- Test all exterior lighting
- Verify fuse box connections
- Inspect wiring harness for wear
Use dielectric grease on all electrical connections
- Replace battery if necessary
- Check ground connections
- Inspect alternator belt
- Test all interior lighting
- Verify charging system performance
Perform load test on battery
- Replace alternator if necessary
- Inspect all wiring harnesses
- Check for corrosion on connectors
- Test all safety systems
- Verify proper operation of all electronic controls
Consider replacing battery as preventive maintenance
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What are the electrical system specifications for the 2020-Present Subaru Legacy?
What are the electrical system specifications for the 2020-Present Subaru Legacy?
The 2020-Present Subaru Legacy features a 12-volt electrical system with a 12V battery and alternator. It supports advanced features like EyeSight Driver Assist Technology, Starlink Multimedia, and optional Harman Kardon audio. The vehicle is compatible with standard 12V accessories and has a maximum alternator output of 150 amps. Always verify compatibility with Subaru-approved parts to ensure optimal performance and safety.
Q2 What are the maintenance requirements for the electrical system in the Subaru Legacy?
What are the maintenance requirements for the electrical system in the Subaru Legacy?
The electrical system requires regular inspection of the battery, alternator, and wiring. Check the battery terminals for corrosion and ensure proper voltage levels (12.4V-12.7V when off, 13.7V-14.7V when running). Inspect fuses and relays annually. Follow Subaru's recommended maintenance schedule, which includes a battery test every 30,000 miles and alternator checks during routine service intervals.
Q3 How do I replace the battery in a 2020-Present Subaru Legacy?
How do I replace the battery in a 2020-Present Subaru Legacy?
To replace the battery, first, turn off the engine and disconnect the negative terminal, then the positive terminal. Remove the battery hold-down clamp and lift the battery out. Install the new battery, ensuring it matches the original specifications. Reconnect the positive terminal first, then the negative terminal. Secure the hold-down clamp and test the electrical system to ensure proper functionality.
Q4 What should I do if the electrical system in my Subaru Legacy malfunctions?
What should I do if the electrical system in my Subaru Legacy malfunctions?
If the electrical system malfunctions, start by checking the battery voltage and connections. Inspect fuses and relays for damage. Use a diagnostic tool to scan for error codes. Common issues include a dead battery, faulty alternator, or blown fuses. If the problem persists, consult a Subaru-certified technician for further diagnosis and repair.
Q5 How can I optimize the performance of the electrical system in my Subaru Legacy?
How can I optimize the performance of the electrical system in my Subaru Legacy?
To optimize performance, ensure the battery is fully charged and terminals are clean. Use Subaru-approved accessories to avoid overloading the system. Regularly update the vehicle's software for systems like EyeSight and Starlink. Avoid prolonged use of high-power accessories when the engine is off to prevent battery drain. Schedule routine inspections to maintain system efficiency.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2020-Present Subaru Legacy Service Manual
Coming SoonComprehensive guide covering electrical system maintenance, troubleshooting, and repair procedures for the Subaru Legacy.
Subaru Technical Service Bulletin (TSB) for Electrical Systems
Coming SoonLatest updates and fixes for known electrical system issues in the 2020-Present Subaru Legacy.
Subaru Legacy Parts and Accessories Catalog
Coming SoonDetailed catalog of OEM electrical components and accessories for the 2020-Present Subaru Legacy.
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