Audi Audi A4 2017-present Electrical Specifications
Detailed technical specifications and documentation for the 2017-Present Audi A4 electrical system, including wiring diagrams, fuse layouts, and diagnostic information.
Electrical Specifications Overview Specifications
This document provides a comprehensive overview of the electrical specifications for the 2017-Present Audi A4. It includes detailed information about the electrical systems, battery, charging, and lighting. Use this guide to understand the technical aspects of the vehicle's electrical components, diagnose issues, and perform maintenance. Navigate through the sections to find specific details or use the quick reference section for key specifications.
How to Use
To search for specific information, use the Ctrl + F function (or equivalent) to locate keywords within the document. Enter relevant terms such as 'battery', 'charging', or 'lighting' to find related sections.
Navigate through the document by scrolling through the sections. Each major section is divided into subsections with detailed technical points. Use the table of contents or quick reference section to quickly access specific information.
Key Specifications
System Voltage
12V DC
Battery Capacity
61Ah to 80Ah
Maximum Charging Current
120A
Headlight Lumen Output
1500 lumens per unit
CAN Bus Speed
500 kbps
Available Specifications
Electrical System Overview
This section provides an overview of the Audi A4's electrical system, including voltage, current ratings, and key components. It covers the fundamental aspects of the vehicle's electrical architecture and its operational parameters.
Electrical System Overview
This section provides an overview of the Audi A4's electrical system, including voltage, current ratings, and key components. It covers the fundamental aspects of the vehicle's electrical architecture and its operational parameters.
Voltage and Current Ratings
- Nominal system voltage: 12V DC
- Maximum current capacity: 150A (continuous)
- Peak current rating: 250A (for 30 seconds)
- Battery voltage range: 10.5V to 14.4V
- Power distribution unit (PDU) rating: 150A
Wiring and Connectors
- Wiring harness material: Cross-linked polyethylene (XLPE)
- Connector types: AMP, Tyco, and OEM-specific
- Sealing rating: IP67 for exterior connectors
- Wire gauge range: 0.5mm2 to 6.0mm2
- Circuit protection: Fuses and electronic circuit breakers
Fuse Boxes and Relays
- Main fuse box location: Driver-side footwell
- Secondary fuse box location: Engine compartment
- Relay module types: Solid-state and electro-mechanical
- Fuse ratings: 5A to 80A
- Circuit protection types: Blade fuses, mini fuses, and high-current fuses
CAN Bus Network
- CAN bus protocol: ISO 11898-2
- Data transmission speed: 500 kbps
- Number of CAN bus nodes: 50+
- Network topology: Central gateway with star configuration
- Diagnosis interface: OBD-II (SAE J1850 PWM)
- Fault tolerance: Dual-wire CAN with error detection
Battery and Charging
This section details the specifications and characteristics of the Audi A4's battery and charging system. It includes information on battery type, capacity, charging rates, and related components.
Battery and Charging
This section details the specifications and characteristics of the Audi A4's battery and charging system. It includes information on battery type, capacity, charging rates, and related components.
Battery Specifications
- Battery type: Enhanced Flooded Battery (EFB)
- Nominal capacity: 61Ah to 80Ah
- Cold cranking current: 720A to 850A
- Battery voltage: 12V DC
- Recommended charging current: 5A to 20A
- Battery life expectancy: 5 to 7 years
Charging System
- Alternator type: Bosch or Valeo
- Alternator output: 150A to 180A
- Voltage regulation: 14.0V to 14.4V
- Maximum charging current: 120A
- Charging system monitoring: Integrated via CAN bus
- Over-voltage protection: 15V maximum
Lighting System
This section provides detailed information about the Audi A4's lighting system, including LED specifications, power consumption, and control mechanisms.
Lighting System
This section provides detailed information about the Audi A4's lighting system, including LED specifications, power consumption, and control mechanisms.
LED Headlights
- LED type: OSRAM or Philips
- Lumen output: 1500 lumens per unit
- Power consumption: 25W to 35W
- Color temperature: 5000K to 6000K
- LED lifespan: 15,000 to 20,000 hours
- Control interface: PWM or LIN bus
Interior Lighting
- Lighting type: LED ambient and functional lighting
- Power consumption: 1W to 5W
- Color temperature: 2700K to 3500K
- Dimming control: PWM or resistive
- Number of interior lights: 10 to 15
- Optional features: Ambient lighting with 30 colors
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Component Specifications
Overview
- Type
- advanced electrical system
- Configuration
- distributed architecture
- Platform
- MLB Evo
- Voltage
- 12V / 48V (hybrid models)
- Location
- Main components in engine compartment and rear
Dimensions
- Battery Capacity
- 70Ah (standard), 80Ah (optional)
- Battery Weight
- 18kg (standard), 20kg (optional)
- Battery Dimensions
- 278mm x 175mm x 190mm
- Alternator Output
- 150A (standard), 180A (optional)
- Wiring Harness Length
- Approx. 3,000 meters
- Fuse Box Dimensions
- 210mm x 150mm x 60mm
- Trunk Electrical Compartment
- 300mm x 200mm x 150mm
Materials
- Battery
- Absorbent Glass Mat (AGM) technology
- Wiring Harness
- Copper core with ETFE insulation
- Fuse Box
- High-temperature resistant plastic
- Connectors
- Sealed connectors with gold-plated contacts
- Busbar
- Aluminum alloy
Features
- infotainment
-
- MMI Navigation Plus with 8.3" display
- Bang & Olufsen Sound System (optional)
- Audi Connect with 4G LTE
- Voice control system
- Driver Assistance
-
- Adaptive Cruise Control
- Lane Keeping Assist
- Automatic Emergency Braking
- 360-degree camera system
- Lighting
-
- LED headlights with dynamic indicators
- Matrix LED headlights (optional)
- Interior ambient lighting with 30 colors
- Comfort
-
- Three-zone automatic climate control
- Electrically adjustable front seats
- Heated steering wheel (optional)
- Ventilated front seats (optional)
- Powertrain
-
- 48V Mild Hybrid System (MHEV)
- Energy recuperation system
- Automatic Start/Stop technology
- Electronically controlled turbocharger
Safety Features
- Battery Protection
-
- Overcharge protection
- Deep discharge protection
- Thermal monitoring
- Circuit Protection
-
- High-current fuses
- Electronic circuit breakers
- Short-circuit protection
- System Redundancy
- Dual battery management system
Comfort Features
- Climate Control
-
- Air quality sensor
- Pollutant sensor
- Solar radiation sensor
- Seating
-
- Memory function for driver seat
- Massage function (optional)
- Heated rear seats (optional)
- Convenience
-
- Keyless Entry and Start
- Remote Parking (optional)
- Electrical tailgate release
Accessories
- Charging
-
- Standard charging cable (Type 2)
- Optional wall box charger
- Portable charging adapter
- interface Modules
-
- Audi Smartphone Interface
- USB-C ports with data transfer
- Auxiliary input jack
- Toolkit
-
- Electrical system diagnostic tool
- Battery test kit
- Fuse extraction tool
Maintenance
- Service interval
-
- Inspection every 10,000 miles
- Battery check every 2 years
- Wiring harness inspection every 30,000 miles
- Fuse box cleaning every 20,000 miles
- Alternator belt replacement every 50,000 miles
- Notes
- Follow Audi recommended maintenance schedule for optimal electrical system performance.
Warranty
- New Vehicle
- Miles: 50,000Years: 4Coverage: Basic vehicle warranty
- Battery
- Miles: 100,000Years: 8Coverage: High-voltage battery warranty
- Accessories
- Miles: 50,000Years: 4Coverage: Accessories warranty
- Terms
- Warranty terms may vary by region and market.
Production Details
- Manufacturer
- Audi AG
- Manufacturing Process
-
- Robot-assisted assembly
- Laser welding
- Automated electrical testing
- End-of-line quality control
- Quality Control
- inspection: 100% electrical system checkTesting: High-voltage system testCertification: Compliance with ISO 26262
- Sustainability
-
- Recyclable materials used
- Energy-efficient production processes
- Reduced carbon footprint manufacturing
- Metrics
- Production Time: Approx. 20 hours per vehicleError Rate: <1% defect rateOutput: Over 150,000 units annually
Service Information for Electrical System Service
Maintenance and service requirements specific to the electrical system
- Battery terminal cleaning
- Check electrical connections
- Inspect wiring harness for damage
- Test alternator output
- Check fuse box integrity
Essential for maintaining system reliability.
- Replace air filter for battery compartment
- Inspect high-voltage cables
- Check electrical cooling system
- Test battery health
- Update software if available
Critical for hybrid models.
- Inspect alternator belt
- Test starter motor performance
- Check electrical system grounds
- Inspect connectors for corrosion
- Perform full system diagnostic
Recommended before extreme weather conditions.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the voltage of the Audi A4's electrical system?
What is the voltage of the Audi A4's electrical system?
The 2017-Present Audi A4 operates on a 12-volt electrical system. The battery is typically rated at 70 Ah (ampere-hours) with a cold cranking amperage (CCA) of 680 A, ensuring reliable performance in various conditions.
Q2 What type of battery does the Audi A4 use?
What type of battery does the Audi A4 use?
The Audi A4 is equipped with a maintenance-free AGM (Absorbent Glass Mat) battery, part number 000 915 105 DL. This battery type is designed for start-stop systems and provides enhanced durability and performance.
Q3 How do I reset the battery management system (BMS) after replacing the battery?
How do I reset the battery management system (BMS) after replacing the battery?
After replacing the battery, the BMS must be reset using a diagnostic tool such as VCDS or ODIS. This ensures the system recognizes the new battery and adjusts charging parameters accordingly. Failure to reset the BMS may lead to improper charging and reduced battery life.
Q4 What is the alternator output on the Audi A4?
What is the alternator output on the Audi A4?
The alternator on the 2017-Present Audi A4 typically has an output of 180-210 amps, depending on the engine and trim level. This ensures sufficient power for the vehicle's electrical systems, including advanced driver-assistance features.
Q5 Can I install aftermarket electrical components without voiding the warranty?
Can I install aftermarket electrical components without voiding the warranty?
Installing aftermarket electrical components may void your warranty if they cause damage to the vehicle's electrical system. Always consult your Audi dealer and use genuine Audi parts to maintain warranty coverage and ensure compatibility.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Audi A4 Electrical System Overview
Coming SoonDetailed guide covering the electrical system architecture, including wiring diagrams, component locations, and system functions.
Battery Replacement and BMS Reset Procedure
Coming SoonStep-by-step instructions for replacing the battery and resetting the Battery Management System (BMS) using diagnostic tools.
Alternator Testing and Diagnostics
Coming SoonTechnical guide on testing the alternator's output and diagnosing common electrical issues related to charging system performance.
Audi Genuine Parts Catalog
Coming SoonOfficial catalog for genuine Audi electrical components, ensuring compatibility and warranty compliance.
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