Acura TSX 2004-2008 Electrical Specifications
Acura TSX 2004-2008

Acura TSX 2004-2008 Electrical Specifications

Discover the electrical specifications for the 2004-2008 Acura TSX, including battery, alternator, wiring, and fuse details. Essential for repairs and upgrades.

Updated

2004-2008 Acura TSX Electrical Specifications Overview Specifications

This document provides a comprehensive overview of the electrical specifications for the 2004-2008 Acura TSX. It includes detailed information on battery, charging, starting, and wiring systems, as well as key electrical components. Use this guide to understand the electrical architecture, troubleshoot issues, and perform maintenance or repairs. Navigate through the sections to find specific details or use the search functionality to locate key specifications quickly.

How to Use

To search for specific information, use the search bar at the top of the document. Enter keywords such as 'battery', 'alternator', or 'wiring' to find relevant sections. Press Enter to execute the search and scroll through the results to locate the desired information.

To navigate this document, use the table of contents on the left-hand side. Click on major sections like 'Battery and Charging System' or 'Starting System' to access detailed subsections. Within each section, expand the details to view technical specifications and key points.

Key Specifications

Battery Voltage

12V

Alternator Output

90A

Starter Motor Current

Up to 200A

Headlight Wattage

55W/65W

ECU Communication

CAN Protocol

Available Specifications

Battery and Charging System

This section outlines the specifications and requirements for the battery and charging system in the 2004-2008 Acura TSX. It includes details on battery type, capacity, charging procedures, and maintenance recommendations.

Battery Specifications
  • Battery Type: Maintenance-free, lead-acid
  • Battery Capacity: 55 Ah (Ampere-hours)
  • Battery Voltage: 12V
  • Cold Cranking Amps (CCA): 550 CCA
  • Battery Weight: Approximately 40 lbs
  • Recommended Replacement Interval: Every 5-7 years
Charging System
  • Alternator Type: Belt-driven, internally regulated
  • Alternator Output: 90A
  • Voltage Regulator: Integrated within alternator
  • Charging Voltage: 13.5-14.5V
  • Belt Tension: 40-50 ft-lbs

Starting System

This section provides detailed information on the starting system, including starter motor specifications, circuit details, and troubleshooting tips.

Starter Motor
  • Starter Motor Type: Direct-drive, gear-reduction
  • Starter Motor Voltage: 12V
  • Starter Motor Current Draw: Up to 200A during cranking
  • Starter Solenoid: Integral to starter motor
  • Recommended Oil for Lubrication: 10W-30 engine oil
Circuit and Safety
  • Circuit Protection: 150A fuse in the under-hood fuse box
  • Cranking Circuit Resistance: Less than 0.5 ohms
  • Starter Engagement Time: Maximum 30 seconds continuous
  • Safety Features: Overcurrent protection, thermal shutdown

Wiring and Electrical Connectors

This section covers the wiring harness, connector types, and electrical system diagnostics for the 2004-2008 Acura TSX.

Wiring Harness
  • Harness Material: Cross-linked polyethylene insulation
  • Gauge Sizes: 10AWG to 22AWG
  • Color Coding: Standard automotive color scheme
  • Protection: Shielded for critical circuits
  • Lifespan: 10+ years under normal conditions
Connectors and Terminals
  • Connector Types: Weather-pack, Metri-Pack, and blade-type
  • Terminal Materials: Tin-plated copper
  • Lubrication: Silicone-based dielectric grease recommended
  • Torque Specification: 10-15 in-lbs for terminal connections
  • Sealing: EPDM rubber for weather resistance

Electronic Control Units (ECUs)

This section details the key ECUs in the Acura TSX electrical system, including their locations, functions, and communication protocols.

Engine Control Module (ECM)
  • Location: Under the dashboard, driver's side
  • Functions: Fuel injection, ignition timing, emissions control
  • Communication: CAN (Controller Area Network) protocol
  • Memory: Stores trouble codes and freeze frame data
  • Update Capability: Re-flashable via Honda HDS
Transmission Control Module (TCM)
  • Location: Behind the transmission
  • Functions: Gear shifting, torque converter control
  • Communication: CAN protocol
  • Solenoid Control: 4-speed automatic transmission
  • Adaptive Learning: Yes, for shift quality

Lighting System

This section outlines the specifications for the exterior and interior lighting systems, including bulb types, wattage, and circuit details.

Exterior Lighting
  • Headlight Type: Halogen (H4 9003)
  • Headlight Wattage: 55W (low beam), 65W (high beam)
  • Taillight Bulb: W21/5W
  • Turn Signal Bulb: 3157 (dual filament)
  • Fog Light: H11 55W
  • License Plate Light: T10 (5W)
Interior Lighting
  • Dashboard Lighting: LED
  • Interior Light Bulb: 2827 (5W)
  • Trunk Light: 161 (10W)
  • Door Courtesy Light: 2827 (5W)
  • Circuit Protection: 10A fuse for interior lights
  • Dimming Control: Rheostat for dashboard lights

Component Specifications

Overview

Type
Maintenance-free lead-acid battery
Configuration
12V electrical system with 120A alternator
Platform
Honda ECU (Engine Control Unit)
Material
Copper wiring with PVC insulation
Location
Battery located in engine compartment

Dimensions

Battery Length
10.24 in (260 mm)
Battery Width
6.81 in (173 mm)
Battery Height
7.09 in (180 mm)
Alternator Size
6.3 in x 4.3 in x 5.1 in (160 mm x 110 mm x 130 mm)
Wiring Gauge
12-14 AWG for main circuits
Ecu Dimensions
7.9 in x 5.9 in x 2.8 in (200 mm x 150 mm x 70 mm)
Fuse Box Dimension
6.7 in x 4.3 in x 2.8 in (170 mm x 110 mm x 70 mm)
Main Wiring Harness Length
26.25 ft (8 meters)

Materials

Battery Terminals
Brass with nickel plating
Wiring
Copper core with PVC insulation
Connectors
Silicone-based waterproof connectors
Fuses
Zinc alloy with silver contacts
Ecu Casing
Aluminum alloy with heat sink

Features

Electrical Power
  • 12V accessory power outlets
  • Cigarette lighter outlet
  • Power windows
  • Power door locks
  • Remote keyless entry system
Charging System
  • 120A alternator
  • Voltage regulator integrated in alternator
  • Overcharge protection
  • Low battery warning system
Wiring And Connectors
  • Waterproof connectors for exterior components
  • Heat-resistant wiring for engine compartment
  • Shielded wiring for sensitive circuits
  • Color-coded wiring for easy identification
Ecu Functionality
  • Engine control module
  • Transmission control module
  • ABS control module
  • Airbag control module
  • Immobilizer system
Circuit Protection
  • Blade-type fuses
  • Relay boxes for high-current applications
  • Short circuit protection
  • Overload protection

Safety Features

Protection Mechanisms
  • Overcharge protection
  • Short circuit protection
  • Voltage surge protection
  • Fuse blown indication
Monitoring Systems
  • Battery voltage monitoring
  • Alternator charging status
  • System voltage monitoring
  • Fault code storage
Connectors And Terminals
  • Waterproof connectors
  • Corrosion-resistant terminals
  • Secure connections
  • Insulated terminal ends

Comfort Features

Lighting
  • Automatic headlights
  • LED interior lights
  • Fog lights
  • Daytime running lights
Convenience
  • Power moonroof
  • Rear window defroster
  • Cruise control
  • Steering wheel controls
infotainment
  • Premium audio system
  • CD player
  • Auxiliary input
  • Bluetooth connectivity (later models)
Accessories
  • Illuminated vanity mirrors
  • Power outlet in trunk
  • Rear seat entertainment system (optional)
  • USB ports (later models)

Accessories

installation Kits
  • Battery terminal cleaner
  • Wiring harness repair kit
  • Fuse replacement set
  • Connector repair kit
Diagnostic Tools
  • OBD-II scanner
  • Multimeter
  • Battery tester
  • Wiring diagram manual
Additional Accessories
  • Auxiliary power distribution block
  • High-capacity alternator
  • Performance wiring kit
  • Relay module upgrade

Maintenance

Service interval
  • Battery terminals: every 30,000 miles
  • Alternator belt: every 60,000 miles
  • Wiring inspection: every 60,000 miles
  • Fuse replacement: as needed
  • ECU software update: as needed
Maintenance Notes
  • Inspect battery terminals for corrosion
  • Check alternator belt for wear
  • Test battery voltage and charging system
  • Verify proper wiring connections
  • Update ECU software if necessary

Warranty

Battery Warranty
Miles: 36,000 miles
Years: 3 years
Coverage: Free replacement
Alternator Warranty
Miles: 100,000 miles
Years: 5 years
Coverage: Replacement or repair
Wiring Warranty
Miles: 100,000 miles
Years: 5 years
Coverage: Repair or replacement
Ecu Warranty
Miles: 150,000 miles
Years: 8 years
Coverage: Replacement or reprogramming

Production Details

Manufacturer
Honda Motor Co., Ltd.
Manufacturing Process
  • Robotic assembly lines
  • Automated welding
  • Computer-controlled testing
  • Quality inspection
Quality Control
inspection: 100% electrical system test
Testing: High and low voltage tests
Certification: Compliance with ISO standards
Sustainability Practices
  • Recyclable materials
  • Energy-efficient manufacturing
  • Hazardous material reduction
  • Compliance with environmental regulations
Production Metrics
Units Per Day: 500 units
Defect Rate: <1%
Cycle Time: 20 minutes per unit
Efficiency: 95% operational efficiency

Service Information for electrical Service

Maintenance and service requirements specific to this component

15,000 miles
12 months
  • Inspect battery terminals for corrosion
  • Check alternator belt condition
  • Test battery voltage and charging system
  • Verify proper wiring connections
  • Inspect fuses and relays

Perform visual inspection of electrical components and connections.

30,000 miles
24 months
  • Replace alternator belt if worn
  • Clean battery terminals
  • Inspect wiring harness for damage
  • Test ECU communication
  • Check circuit protection systems

Use manufacturer-approved tools and procedures.

60,000 miles
48 months
  • Replace battery if capacity is low
  • Inspect and clean wiring connectors
  • Test alternator output
  • Update ECU software if available
  • Inspect fuse box and relay module

Address any issues found during inspection promptly.

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What are the technical specifications of the electrical system in the 2004-2008 Acura TSX?

The 2004-2008 Acura TSX features a 12-volt electrical system with a maintenance-free battery rated at 51Ah/450 CCA. The alternator is a 70-amp unit, and the vehicle uses a single battery configuration. Compatibility with aftermarket electrical components requires ensuring they meet the specified voltage and amperage ratings to avoid system damage.

Q2

What are the recommended maintenance requirements for the electrical system?

Regular maintenance includes checking the battery terminals for corrosion, ensuring the alternator belt is properly tensioned, and testing the battery every 6 months. Replace the battery every 5-7 years or when capacity drops below 75%. Inspect wiring and connections annually for signs of wear or damage.

Q3

How do I install or replace the battery in my 2004-2008 Acura TSX?

1. Disconnect the negative (black) cable from the battery. 2. Remove the positive (red) cable and any brackets holding the battery in place. 3. Lift the old battery out and insert the new one. 4. Secure the new battery with the bracket. 5. Reconnect the positive cable, then the negative cable. Start the engine to test the electrical system.

Q4

How do I troubleshoot common electrical issues in my Acura TSX?

Start by checking the fuse box for blown fuses. Use a multimeter to test battery voltage (should be 12.4-12.7V when off, 13.5-14.5V when charging). Inspect wiring and connections for damage or corrosion. If issues persist, consult the wiring diagram or use an OBD-II scanner to identify fault codes.

Q5

What can I do to optimize the electrical system's performance?

Upgrade to a high-performance battery with increased CCA for better starting power. Consider adding a capacitor to stabilize voltage during high-demand situations like audio system use. Ensure all electrical connections are clean and secure. Avoid overloading circuits with excessive aftermarket accessories.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

2004-2008 Acura TSX Service Manual

Coming Soon

Comprehensive guide covering electrical system diagnostics, maintenance, and repair procedures.

Acura Technical Bulletin: Battery Maintenance and Replacement

Coming Soon

Official guidelines for battery care, testing, and replacement procedures specific to the TSX.

Acura Genuine Parts Catalog: Electrical Components

Coming Soon

Detailed catalog of genuine electrical parts, including batteries, alternators, and wiring harnesses.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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