🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2004 Product Type: Wiring Diagram Manual 👋 Introduction Market Position Vehicle Segment: Compact/Small Family Car, known for its all-wheel-drive capability and sporty variants. Competitive Analysis Key Competitors: Mitsubishi Lancer, Honda Civic, Toyota Corolla, Mazda3, Ford Focus. Key Features Performance Variants: The 2004 model year continued the legacy of performance with WRX and STI variants, known for their turbocharged engines and advanced AWD systems. AWD Emphasis: Subaru's Symmetrical All-Wheel Drive system is a hallmark, providing enhanced traction and handling in various conditions. Manual Usefulness Diagnostic Value: Essential for diagnosing and repairing complex electrical issues, reducing diagnostic time, and ensuring proper system function. Diy Support: Empowers DIY mechanics to tackle advanced electrical repairs and modifications with accurate schematic information. 📋 Manual Details Coverage Areas Covered Systems: Complete electrical system, including engine control, lighting, audio, climate control, safety systems, and body electronics. Page Count Pages: Estimated 200-300 pages (typical for this type of specialized manual) Manual Type Type: Technical Service Manual Supplement (Wiring Diagrams) Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Management: Detailed wiring for Engine Control Module (ECM), fuel injectors, ignition system, sensors (oxygen, MAP, MAF, coolant temp, crank/cam position), and actuators. Powertrain Controls: Wiring for transmission control module (if applicable), solenoids, and sensors related to powertrain operation. Lighting System Exterior Lighting: Headlights (low/high beam), taillights, brake lights, turn signals, fog lights, license plate lights, and associated switches/relays. Interior Lighting: Dome lights, vanity lights, dashboard illumination, and instrument cluster lighting. Audio Visual Stereo System: Wiring for factory radio, speakers, antenna, and amplifier (if equipped). Climate Control HVAC System: Wiring for blower motor, HVAC control panel, A/C compressor clutch, temperature sensors, and actuators. Safety Security Airbag System: Wiring for SRS module, impact sensors, pretensioners, and warning lights. Anti Theft Alarm: Wiring for factory alarm system, immobilizer, and door lock actuators. Body Electronics Power Accessories: Wiring for power windows, power door locks, power mirrors, and sunroof (if equipped). Wiper Washer: Wiring for front and rear wipers, washer pump, and related switches. Instrument Cluster: Wiring for speedometer, tachometer, fuel gauge, temperature gauge, warning lights, and information displays. Procedures Included Troubleshooting: Guidance on diagnosing electrical faults using wiring diagrams, component testing procedures, and common failure points. Component Identification: Identification of electrical components, connectors, terminals, and wire colors. Harness Routing: Information on the routing and protection of wiring harnesses throughout the vehicle. Technical Depth Depth: Advanced diagnostics and repair, suitable for professional technicians and experienced DIYers. Includes detailed schematics, connector views, and component locations. 📊 Manual Specifications File Format File Type: PDF Searchable: Yes (text-searchable) Printable: Yes Print Quality Resolution: High-resolution (suitable for clear viewing of diagrams and text) Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally Opposed (Boxer) Engine Displacement Liter: 2.5L (EJ25 SOHC/DOHC) Horsepower Hp: Standard models: 165-175 hp; WRX: 227 hp; STI: 300 hp (approximate, varies by specific model and market) Torque Lb Ft: Standard models: 166-170 lb-ft; WRX: 224 lb-ft; STI: 300 lb-ft (approximate) Performance Turbocharger: Yes (standard on WRX and STI models) Drivetrain: Symmetrical All-Wheel Drive (AWD) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Fuel Type: Unleaded gasoline (Premium Unleaded required for WRX/STI) 🔧 Transmission Standard Transmission Type: 5-speed Manual Transmission Optional Transmission Type: 4-speed Automatic Transmission Features AWD Coupling: Viscous coupling center differential (manual) / electronically controlled AWD (automatic). Sti Differential: Driver Controlled Center Differential (DCCD) on STI models. 📐 Dimensions Exterior Length Inches: Approx. 174.5 - 177.1 inches (varies by body style) Width Inches: Approx. 67.9 inches Height Inches: Approx. 57.9 - 58.7 inches (varies by body style) Wheelbase Inches: Approx. 104.0 inches Cargo Cargo Volume Cu Ft: Approx. 11.4 - 12.7 cu ft (sedan/wagon, varies) Weights Curb Weight Lbs: Approx. 2800 - 3150 lbs (varies by model and configuration) 🛡️ Safety Features Ratings NHTSA Front Crash Driver: 5-Star (for applicable models/years) NHTSA Front Crash Passenger: 5-Star (for applicable models/years) IIHS Front Offset Score: Good (for applicable models/years, check specific tests) Active Features ABS: Standard (Anti-lock Braking System) Traction Control: Available on some models, standard on WRX/STI. Electronic Stability Control: Not widely available or standard on this generation's common trims. Passive Features Airbags: Front airbags, optional side airbags. Seatbelts: Three-point seatbelts with pretensioners for front seats. 💡 Technology Features Infotainment Head Unit: Factory AM/FM/CD player, often with cassette. Higher trims may offer premium audio systems. Speaker Configuration: Typically 4 or 6 speakers, with subwoofer option on higher trims. Driver Assistance Cruise Control: Standard on most models. Connectivity Auxiliary Input: Not standard; often added aftermarket. Diagnostic Ports OBD Ii: Standard OBD-II diagnostic port for engine and emissions monitoring. 🔧 Maintenance Service Intervals Oil Change: Every 3,000-5,000 miles or 3-6 months, depending on driving conditions and oil type used. Air Filter: Replace every 15,000-30,000...