Infiniti M45 2003-2004 Electrical Specifications
Explore the comprehensive electrical specifications for the 2003-2004 Infiniti M45, including battery, alternator, wiring, fuses, and relays. Ideal for diagnostics, maintenance, and repair.
Overview Specifications
This document provides detailed electrical specifications for the 2003-2004 Infiniti M45. It is designed to assist technicians, enthusiasts, and owners in understanding the vehicle's electrical systems, including the battery, alternator, wiring, and lighting. Use the search functionality to locate specific terms or navigate through sections to explore detailed information about each component.
How to Use
Use the search bar to enter keywords related to the electrical system, such as 'battery voltage' or 'headlight wiring'. Results will highlight relevant sections and subsections.
Scroll through the document or use the table of contents to jump to specific sections. Each section is organized into subsections with detailed technical points for easy reference.
Key Specifications
Battery Voltage
12V
Alternator Output
120A
Headlight Wattage
55W/60W
Fuse Ratings
5A-30A
Wire Gauge
16 AWG
Available Specifications
Battery and Charging System
This section covers the battery specifications, alternator output, and charging system details for the 2003-2004 Infiniti M45. It includes information on voltage, capacity, and maintenance requirements.
Battery and Charging System
This section covers the battery specifications, alternator output, and charging system details for the 2003-2004 Infiniti M45. It includes information on voltage, capacity, and maintenance requirements.
Battery Specifications
- Type: Maintenance-free lead-acid battery
- Voltage: 12V
- Capacity: 70Ah
- Cold Cranking Amps (CCA): 600A
- Terminal Type: Top-post
Alternator Specifications
- Output: 120A
- Voltage Regulation: 14.4V
- Belt Type: Serpentine
- Pulley Diameter: 2.5 inches
Lighting System
This section provides details on the lighting system, including headlights, taillights, and interior lighting. It covers bulb types, wattage, and wiring configurations.
Lighting System
This section provides details on the lighting system, including headlights, taillights, and interior lighting. It covers bulb types, wattage, and wiring configurations.
Headlight Specifications
- Type: Halogen
- Low Beam Wattage: 55W
- High Beam Wattage: 60W
- Bulb Size: H7
Taillight Specifications
- Type: LED
- Brake Light Wattage: 21W
- Turn Signal Wattage: 21W
- Bulb Size: 7443
Wiring and Fuses
This section outlines the wiring harness configurations, fuse box locations, and fuse ratings for the 2003-2004 Infiniti M45. It includes details on wire gauge and circuit protection.
Wiring and Fuses
This section outlines the wiring harness configurations, fuse box locations, and fuse ratings for the 2003-2004 Infiniti M45. It includes details on wire gauge and circuit protection.
Fuse Box Locations
- Main Fuse Box: Under the hood
- Interior Fuse Box: Driver's side dashboard
- Fuse Ratings: 5A to 30A
Wiring Specifications
- Primary Wire Gauge: 16 AWG
- Ground Wire Gauge: 12 AWG
- Circuit Protection: Blade fuses and relays
Search Specifications
Search by specification name, value, or description
Type to search through torque specifications. Results will appear below as you type.
Component Specifications
Overview
- Type
- 12V DC system
- Configuration
- Negative ground
- Platform
- FM platform
- Material
- Copper wiring with PVC insulation
- Location
- Distributed throughout vehicle
Dimensions
- Battery Length
- 10.5 in (26.67 cm)
- Battery Width
- 6.9 in (17.53 cm)
- Battery Height
- 8.4 in (21.34 cm)
- Alternator Diameter
- 5.1 in (12.95 cm)
- Alternator Length
- 7.3 in (18.54 cm)
- Wire Gauge Range
- 8 AWG to 22 AWG
- Fuse Box Dimensions
- 8.7 x 5.9 x 3.1 in (22.1 x 15 x 7.9 cm)
Materials
- Battery Case
- Polypropylene
- Alternator Housing
- Aluminum alloy
- Wiring Harness
- Copper with PVC insulation
- Fuse Box
- Thermoplastic
- Connectors
- Nylon with brass contacts
Features
- Lighting System
-
- Xenon HID headlights
- LED tail lights
- Auto-leveling headlights
- Adaptive front lighting system
- Power Distribution
-
- 120A alternator
- 70Ah maintenance-free battery
- Intelligent power distribution module
- Multiple fuse protection circuits
- Sensors
-
- Rain-sensing wipers
- Ambient light sensor
- Battery voltage sensor
- Alternator load sensor
- Entertainment
-
- Bose premium audio system
- 6-disc CD changer
- Steering wheel audio controls
- Navigation system with touchscreen
- Climate Control
-
- Automatic dual-zone climate control
- Rear window defogger
- Heated mirrors
- Cabin air filter
Safety Features
- Lighting Safety
-
- Automatic headlight leveling
- Emergency brake light system
- Daytime running lights
- Electrical Protection
-
- Short circuit protection
- Overvoltage protection
- Reverse polarity protection
- Crash Safety
-
- Automatic battery disconnect
- Impact sensor system
- Emergency power reserve
Comfort Features
- Lighting Comfort
-
- Auto-dimming rearview mirror
- Puddle lights
- Interior mood lighting
- Power Features
-
- Power windows with auto-up/down
- Power adjustable pedals
- Power tilt/telescopic steering wheel
- Convenience
-
- Keyless entry system
- Automatic door locks
- Remote trunk release
Accessories
- Exterior Lighting
-
- Fog lights
- LED license plate lights
- Automatic headlight washers
- interior Lighting
-
- Map lights
- Dome light
- Trunk light
- Power Ports
-
- 12V front power outlet
- 12V rear power outlet
- Cigarette lighter
Maintenance
- Service interval
- Every 15,000 miles or 12 months
- Service Items
-
- Battery terminal cleaning
- Alternator belt inspection
- Ground connection check
- Fuse condition check
- Wiring harness inspection
- Maintenance Notes
- Use only manufacturer-recommended replacement parts for electrical components
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Electrical components excluding wear items
- Powertrain
- Miles: 60,000Years: 5Coverage: Alternator and starter motor
- Corrosion
- Miles: UnlimitedYears: 7Coverage: Electrical connectors and wiring
- Battery
- Miles: 36,000Years: 3Coverage: Free replacement within warranty period
Production Details
- Manufacturer
- Infiniti (Nissan Motor Co.)
- Manufacturing Process
-
- Automated wiring harness assembly
- Robotic component installation
- Laser-guided quality control
- Quality Control
- Voltage Testing: 100% component testingDurability Testing: Thermal and vibration testingSafety Testing: Short circuit and overload testing
- Sustainability Practices
-
- Lead-free solder
- Recyclable wiring materials
- Energy-efficient production
- Production Metrics
- Daily Output: 120 unitsDefect Rate: 0.02%Energy Consumption: 15 kWh per unit
Service Information for electrical Service
Maintenance and service requirements specific to electrical system
- Inspect battery condition and charge level
- Check alternator output voltage
- Test starter motor operation
- Inspect wiring harness for damage
- Verify proper operation of all lights
Use only manufacturer-approved diagnostic equipment
- Clean battery terminals and apply protective coating
- Check ground connections for corrosion
- Test all electrical sensors
- Inspect fuse box for proper operation
- Verify proper operation of power accessories
Special attention to high-current connections
- Perform complete electrical system diagnostic
- Replace battery if necessary
- Inspect and replace alternator belt if worn
- Check all wiring harness connectors
- Test emergency electrical systems
Major service requires specialized equipment and training
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What are the electrical system specifications for the 2003-2004 Infiniti M45?
What are the electrical system specifications for the 2003-2004 Infiniti M45?
The 2003-2004 Infiniti M45 features a 12-volt electrical system with a 100-amp alternator and a 70-amp battery. It supports advanced electronics, including a Bose audio system, power windows, and a navigation system. The vehicle is compatible with standard automotive electrical components, but OEM parts are recommended for optimal performance. Always verify compatibility with the vehicle's VIN before purchasing aftermarket parts.
Q2 What are the maintenance requirements for the electrical system?
What are the maintenance requirements for the electrical system?
Regular maintenance for the electrical system includes inspecting the battery terminals for corrosion, checking the alternator's output, and ensuring all fuses and relays are functioning. The battery should be tested annually, and the charging system should be inspected every 30,000 miles. Replace worn-out components like spark plugs and ignition coils as per the manufacturer's schedule to maintain optimal electrical performance.
Q3 How do I replace the alternator in a 2003-2004 Infiniti M45?
How do I replace the alternator in a 2003-2004 Infiniti M45?
To replace the alternator, first disconnect the negative battery terminal. Remove the serpentine belt using a wrench to release tension. Unbolt the alternator and disconnect its electrical connections. Install the new alternator by reversing the steps, ensuring all bolts are tightened to the manufacturer's specifications. Reconnect the battery and test the charging system to confirm proper installation.
Q4 What should I do if my Infiniti M45's electrical system is malfunctioning?
What should I do if my Infiniti M45's electrical system is malfunctioning?
Start by checking the battery voltage with a multimeter; it should read around 12.6 volts when off and 13.7-14.7 volts when running. Inspect fuses and relays for damage. If the issue persists, scan the vehicle for error codes using an OBD-II scanner. Common issues include a failing alternator, corroded battery terminals, or faulty wiring. Consult a professional if troubleshooting does not resolve the problem.
Q5 How can I optimize the electrical system's performance?
How can I optimize the electrical system's performance?
To optimize performance, ensure the battery is fully charged and free of corrosion. Use high-quality OEM or equivalent parts for replacements. Regularly inspect wiring harnesses for wear or damage. Avoid overloading the system with aftermarket accessories. Keep the alternator and voltage regulator in good condition to maintain consistent power delivery. Follow the manufacturer's maintenance schedule for best results.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2003-2004 Infiniti M45 Service Manual
Coming SoonComprehensive guide covering electrical system diagnostics, repairs, and maintenance procedures for the 2003-2004 Infiniti M45.
Infiniti M45 Technical Service Bulletin (TSB)
Coming SoonLatest updates and fixes for known electrical system issues in the 2003-2004 Infiniti M45.
Infiniti M45 Parts and Accessories Catalog
Coming SoonDetailed catalog of OEM electrical components and accessories for the 2003-2004 Infiniti M45.
About the Author
Expert automotive knowledge and experience
'/%3E%3Cpath d='M60 30a20 20 0 1 1 0 40 20 20 0 0 1 0-40zm0 45c16.5 0 30 7.5 30 16.8V100H30v-8.2c0-9.3 13.5-16.8 30-16.8z' fill='%23404040'/%3E%3C/svg%3E)
Diagnostic
Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.
Repair
Expert in both traditional mechanical repairs and modern vehicle systems.
Additional Expertise
Documentation
Created over 500 detailed repair guides and technical documents.
Training
Conducted technical training sessions and contributed to repair databases.
Certifications & Research
Certifications
- ASE Master Technician Certification
- Advanced Diagnostic Specialist
- Hybrid/Electric Vehicle Systems
- Performance Tuning Expert
Research & Community
Actively researches emerging technologies and contributes to automotive forums.
Legal Disclaimer
Important information about using this content
Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.
General Information
Warranty & Liability
The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.
We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.