🏷️ Basic Information Identification Make: Porsche Model: 928 GTS Model Year Covered: 1993-1993 Product Type: Wiring Diagram Manual Codes Chassis Code: 928 👋 Introduction Market Position Positioning: Premium Grand Tourer, direct competitor to Aston Martin, Ferrari, and high-end Mercedes-Benz models of its era. Competitive Analysis Key Competitors: Ferrari 412, Aston Martin V8 Vantage, Mercedes-Benz SEC models Key Features Dvantage: Front-engine, rear-drive V8 configuration with advanced technology for its time, robust build quality, and unique design. Design Philosophy: Comfortable, powerful, and capable of high-speed touring, blending sports car performance with GT luxury. 📋 Manual Details Coverage Areas Primary Focus: Electrical Systems Diagnostic Scope: Troubleshooting and Repair of Electrical Faults Page Count Estimated Pages: 150-250 Manual Type Type: Specialized Electrical Wiring Diagram Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Power Distribution: Battery, Alternator, Fuses, Relays Ignition System: Ignition Module, Spark Plugs, Coils Fuel System Electronics: Fuel Pump, Injectors, Engine Control Unit (ECU) Signals Lighting System: Headlights, Taillights, Interior Lighting, Fog Lights Instrumentation Gauges: Speedometer, Tachometer, Fuel Gauge, Temperature Gauge, Warning Lights Comfort Convenience: Power Windows, Power Seats, Sunroof, Climate Control (HVAC), Central Locking, Cruise Control Audio Entertainment: Radio, Amplifier, Speaker Wiring Safety Systems: ABS (Anti-lock Braking System), Airbag System (if equipped) Engine Management: Sensors (e.g., Crankshaft Position, Camshaft Position, Knock), Actuators, ECU Wiring Transmission Electronics: Automatic Transmission Control Unit (if applicable) Procedures Included Component Identification: Location and function of electrical components and connectors Wiring Path Tracing: Following wire harnesses from source to destination Troubleshooting Charts: Systematic approaches to diagnose electrical faults Connector Pinouts: Detailed diagrams of connector terminals and their functions Fuse Relay Identification: Location, rating, and function of fuses and relays Ground Point Locations: Identifying all chassis and component ground points Technical Depth Depth: Comprehensive - suitable for professional technicians and knowledgeable DIYers Diagnostic Level: Advanced diagnostics, including voltage, resistance, and continuity testing 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable (OCR'd if originally scanned) Print Quality Resolution: High resolution for clear diagrams and text Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: V8, Naturally Aspirated Engine Code: M64.03 Displacement: 5.4 Liters (5327 cc) Bore X Stroke: 97 mm x 92 mm Compression Ratio: 10.4:1 Performance Horsepower: 306 PS (302 bhp / 225 kW) @ 5200 rpm Torque: 48.5 kg⋅m (476 N⋅m; 351 lb⋅ft) @ 4000 rpm Fuel System Injection: Bosch LH-Jetronic 2.7 Fuel Injection Fuel Type: Premium Unleaded (91 Octane or higher) Engine Management ECU Type: Motronic (specific variant for M64.03) 🔧 Transmission Standard Type: 5-Speed Manual Transaxle (G50/10) Optional Type: 4-Speed Automatic (Tiptronic - introduced late in the 928 lifecycle, primarily for earlier models but a possibility for later ones if specified) Features Transaxle Layout: Rear-mounted transaxle for optimal weight distribution Clutch Type: Hydraulically actuated, single dry plate clutch (for manual) 📐 Dimensions Exterior Length: 4688 mm (184.6 in) Width: 1890 mm (74.4 in) Height: 1280 mm (50.4 in) Wheelbase: 2500 mm (98.4 in) Front Track: 1590 mm (62.6 in) Rear Track: 1600 mm (63.0 in) Weights Curb Weight: 1710 kg (3770 lb) Gross Vehicle Weight Rating: 2110 kg (4652 lb) Towing Capacity: N/A (Not Recommended) Cargo Cargo Volume: Approx. 0.4 cubic meters (14 cubic feet) rear hatchback storage Wheels Tires Wheel Size Standard: 17 x 8J (front), 17 x 9J (rear) - "Cup” Design Tire Size Standard: 225/45 ZR17 (front), 255/40 ZR17 (rear) Bolt Pattern: 5 x 130 mm Offset Front: ET55 Offset Rear: ET50 🛡️ Safety Features Ratings Certification: Euro NCAP (Not applicable for this model year, but designed to high safety standards) Active Features Brakes Front: Vented Discs, 322 mm diameter, 4-piston calipers (ABS equipped) Brakes Rear: Solid Discs, 299 mm diameter, 2-piston calipers (ABS equipped) ABS: Bosch ABS III Traction Control: ASR (Anti-Slip Regulation) - standard on GTS Passive Features Airbags: Driver and passenger airbags (standard on GTS) Seatbelts: 3-point inertia reel seatbelts with pretensioners Chassis Structure: Integrated safety cage, crumple zones Headlights: High-intensity discharge (HID) Xenon headlights (optional, but common on GTS) 💡 Technology Features Infotainment Audio System: Porsche CR-210 or CR-110 radio with cassette player (optional CD changer available). Driver Assistance Cruise Control: Standard electronic cruise control system. Climate Control: Automatic climate control with recirculate function and A/C. Connectivity Telematics: No integrated telematics or Bluetooth connectivity (era appropriate). Convenience Seats: Power adjustable front seats with memory function (driver side). Mirrors: Electrically adjustable and heated exterior mirrors. Windows: Power windows, power sunroof. 🔧 Maintenance Service Intervals Oil Change Interval: Every 10,000 km (6,000 miles) or 12 months, whichever comes first. Major Service Interval: Every 40,000 km (24,000 miles) or 24 months, includes timing belt replacement (critical). Fluid Specifications Engine Oil: SAE 5W-40 or 0W-40 Synthetic (API SJ/CF or higher). Capacity: 8.5 Liters (9.0 US Quarts) with filter. Coolant: Porsche approved G48 ethylene glycol coolant mixture...