🏷️ Basic Information Identification Make: BMW Model: 635CSi Model Variant: M6 Year: 1988 Chassis Code: E24 Manual Product Name: BMW 635CSi M6 Electrical Troubleshooting Manual 1988 ETM Manual Type: Electrical Troubleshooting Manual (ETM) 👋 Introduction Market Position Target Audience: BMW owners, independent repair shops, automotive technicians specializing in vintage BMWs. Competitive Analysis Manual Value Proposition: Provides essential, manufacturer-specific electrical diagnostic data for a classic performance coupe, often difficult to find in generic repair manuals. Key Features Diagnostic Focus: Dedicated electrical troubleshooting, crucial for complex systems of this era. Convenience: Instant digital download eliminates shipping time and cost, providing immediate access. 📋 Manual Details Coverage Areas Primary Focus: Electrical systems and diagnostics for BMW 635CSi / M6 (E24) models of 1988 Page Count Estimated Page Count: Varies by specific ETM release, but typically comprehensive for electrical systems. Manual Type Manual Format Digital: PDF Language Language: English Format Digital Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Engine Management Electronics: Bosch Motronic ECU, fuel injection, ignition system wiring, sensors (crankshaft, camshaft, knock, lambda), actuators (injectors, idle control valve). Lighting System: Headlights (low/high beam), taillights, brake lights, turn signals, interior lighting, fog lights, license plate illumination. Instrument Panel And Gauges: Speedometer, tachometer, fuel gauge, oil pressure, coolant temperature, warning lights (ABS, check engine, brake, oil, battery), OBC (On-Board Computer) wiring. Power Windows And Locks: Wiring diagrams for power window motors, central locking system, door lock actuators, switches. Heating And Air Conditioning: HVAC blower motor, climate control unit, compressor clutch wiring, temperature sensors, actuators. Audio And Communication: Radio wiring, speaker connections, antenna system, antenna amplifier. Wiper And Washer System: Wiper motor, washer pump, intermittent wiper module, controls. Starter And Charging System: Starter motor circuit, alternator wiring, voltage regulator, battery connections. ABS Anti-Lock Braking System: ABS control unit wiring, wheel speed sensor connections, hydraulic modulator unit wiring. Cruise Control System: Control module wiring, speed sensor input, actuator connections, steering wheel controls. Body Control Electronics: Central locking, power mirrors, seat adjustments (if power equipped), sunroof operation. Fuse And Relay Locations: Detailed diagrams indicating fuse box layouts, relay assignments, and fuse amperage ratings for various circuits. Procedures Included Troubleshooting Flowcharts: Systematic diagnostic procedures for identifying electrical faults based on symptoms. Wiring Diagrams: Comprehensive, color-coded wiring schematics showing component interconnections, wire colors, and terminal designations. Component Location Diagrams: Illustrations and descriptions showing the physical location of electrical components, modules, connectors, and ground points within the vehicle. Connector Views: Detailed views of electrical connectors, including pin-out assignments and terminal types. Diagnostic Test Points: Identification of specific points in the wiring harness for measuring voltage, resistance, or continuity. Technical Depth Diagnostic Methodology: Advanced diagnostic techniques tailored for automotive electrical systems, including symptom-based troubleshooting and component testing. Repair Procedures Electrical: Guidance on repairing wiring harness damage, replacing electrical components, and ensuring proper system function after repair. Component Specifications: Electrical specifications for key components, such as resistance values, operating voltages, and current draw. 📊 Manual Specifications File Format Digital File Type: PDF (Portable Document Format) Print Quality Digital Readability: Designed for clear viewing on various devices (PC, Mac, Tablet, Smartphone). Printability: Fully printable for hardcopy reference. Binding Type Physical Binding If Printed: Not applicable for digital download, but implies printable for binding. Paper Type Physical Paper Type If Printed: Not applicable for digital download, but implies standard print paper. ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline-6 Engine Code 635Csi: M30B34 (3.4L) Engine Code M6: S38B35 (3.5L - M6 European Spec, US M6 had specific tuning) Performance Horsepower 635Csi Approx: 218 hp (DIN) / 208 hp (SAE) Horsepower M6 Approx Eu: 286 hp (DIN) Torque 635Csi Approx: 224 lb-ft (304 Nm) Torque M6 Approx Eu: 251 lb-ft (340 Nm) Fuel System Fuel Delivery: Bosch LE-Jetronic or L-Jetronic (depending on market and specific engine variant) with Electronic Fuel Injection (EFI). Ignition System: Distributorless Ignition System (DIS) or Distributor-based electronic ignition with individual coil packs for later models/M variants. Fuel Type: Premium Unleaded Gasoline 🔧 Transmission Standard Transmission Type 635Csi: Getrag 5-speed manual transmission Optional Transmission Type Optional: ZF 4-speed automatic transmission Features Transmission Fluid Spec: Dexron II (for automatic), Gear Oil GL-4 or GL-5 (for manual, consult specific manual for viscosity grade). 📐 Dimensions Exterior Length: Approx. 4755 mm (187.2 in) Width: Approx. 1720 mm (67.7 in) Height: Approx. 1360 mm (53.5 in) Weights Curb Weight Approx 635Csi: Approx. 1500-1600 kg (3300-3520 lbs) Curb Weight Approx M6: Approx. 1600-1700 kg (3520-3740 lbs) 🛡️ Safety Features Ratings Crash Test Data Availability: Limited public crash test data available for this specific model year from independent agencies; rely on manufacturer design intent and era standards. Active Features ABS: Available as an option, standard on some M6 variants. Traction Control: Not typically available on 1988 models. Passive Features Seatbelts: 3-point inertia reel seatbelts with pretensioners (front). Airbags: Driver-side airbag was an option on later...