BMW 735i (e32) 1987-1988 Electrical TROUBLESHOOTING Manual
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🏷️ Basic Information Identification Make: BMW Model: 735i Chassis Code: E32 Model Years Covered: 1987-1988 👋 Introduction Market Position Target Audience: BMW 735i (E32) owners and independent workshops Competitive Analysis Value Proposition: Enables significant cost savings on vehicle repairs by providing professional-grade diagnostic and repair information Key Features Professional Standard: Identical manual used by professional garages and workshops Comprehensiveness: Covers all necessary instructions for repairs from front to back User Friendliness: Step-by-step explanations and illustrations suitable for varying levels of mechanical knowledge 📋 Manual Details Coverage Areas Primary Focus: Electrical Systems and Troubleshooting Component Coverage: Front to back of the car, all electrical components and systems Page Count Estimated Count: N/A (Specific page count not provided in product information) Manual Type Type: Electrical Troubleshooting Manual Language Language: English (Implied by context and common availability) Format Format: N/A (Not specified, likely printed or digital PDF) 📖 Manual Coverage Systems Covered Power Distribution: Detailed charts and explanations of power flow Fuses And Relays: Fuse charts, fuse details, and power distribution related to fuses Ground Distribution: Grounding points and distribution networks Data Link Connector: Information on diagnostic data link Engine Management: Engine Control System troubleshooting Charging System: Troubleshooting the charging system (alternator, battery) Starting System: Troubleshooting the starter motor and related circuits Transmission Control: Electronic transmission control diagnostics Safety Systems: Supplement restraint system (SRS), Slip control ABS Comfort Features Electrical: Power Mirrors, Central Locking Module, Power Windows, Power Seats, Heated Seats, Power Sun Roof Visibility Systems Electrical: Horn, Wiper/Washer Module, Headlight Washer, Windshield washer jet heaters Instrumentation: Instrument cluster diagnostics Clocks And Timers: Multi Function Clock troubleshooting Lighting Systems: Light switch details, Headlights/Fog lights, Turn/Hazard lights, Park/Tail/Underhood lights, License plate/luggage compartment lights, Back up lights, Brake Lights, Interior Lights, Glove box light/cassette box ashtry lights/charging socket Crash And Climate Control: Crash Control module, Park ventilation with HKR, Rear Window defogger, Integrated climate regulation Audio And Communication: Radio/CD player, Radio/HiFi, Cellular Telephone Convenience Features: Cruise Control (Tempomat), On Board Computer Security: Anti Theft system Procedures Included Troubleshooting Methodology: Step-by-step explanations for diagnosing electrical faults Diagnostic Tools: Implied use of diagnostic tools and techniques Component Identification: Component Location Chart and Views for easy identification Wiring Diagrams: Diagrams for electrical circuits and wiring Splices And Connectors: Splice Location Views and Connector Views for electrical junctions Technical Depth Depth Of Information: In-depth technical information, detailed illustrations, and diagrams User Skill Level: Suitable for users with basic mechanical knowledge, with clear explanations Repair Guidance: Instructions for all repairs, enabling users to get their car running in 100% condition 📊 Manual Specifications File Format Format: N/A (Not specified, but likely printable PDF or physical book) Print Quality Quality: N/A (Not specified, but implied to be of professional workshop standard) Binding Type Binding: N/A (Not specified for digital, typically spiral-bound or perfect-bound for printed manuals) Paper Type Paper: N/A (Not specified for digital, typically durable paper for printed manuals) ⚙️ Engine Specifications Primary Engine Engine Code: M30B34 Engine Type: 3.4L Inline-6 (M30) Performance Horsepower: Approx. 211 hp @ 5700 rpm (for Euro spec, US spec slightly lower) Torque: Approx. 224 lb-ft (304 Nm) @ 3700 rpm (for Euro spec, US spec slightly lower) Fuel System Fuel Delivery: Bosch Motronic electronic fuel injection Engine Management Control System: Motronic ECU (detailed in manual) 🔧 Transmission Standard Type: 4-speed Automatic (ZF 4HP22) Optional Type: 5-speed Manual (Getrag 265) Features Electronic Control: Electronic Transmission Control for automatic transmission (covered in manual) 📐 Dimensions Exterior Length: Approx. 4965 mm (195.5 in) Width: Approx. 1800 mm (70.9 in) Height: Approx. 1400 mm (55.1 in) Weights Curb Weight: Approx. 1650-1750 kg (3638-3858 lbs), depending on options 🛡️ Safety Features Ratings Crash Test Performance: N/A (Specific ratings for this era may be limited or not directly comparable to modern standards) Active Features ABS: Anti-lock Braking System (ABS) - covered in manual Passive Features Srs Airbags: Supplement Restraint System (SRS) - driver airbag standard, potentially passenger airbag optional (covered in manual) 💡 Technology Features Infotainment Audio System: Optional BMW Bavaria C or Professional RDS radio with CD player integration Driver Assistance Cruise Control: Standard on many models, known as 'Tempomat' in BMW nomenclature Traction Control: ASC (Automatic Stability Control) became available later in the E32 production, but ABS was a key safety feature. Connectivity Telephone: Optional integrated cellular telephone system Comfort Technology Climate Control: Integrated climate regulation with automatic temperature control 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-7,500 miles or 6-12 months, check specific manual for precise details. Major Service Intervals: Spark plugs, coolant, brake fluid, transmission fluid typically at 30,000-60,000 mile intervals, refer to specific owner's manual. Fluid Specifications Engine Oil: API SG or higher, SAE 15W-40 or 10W-40 (check specific manual for precise viscosity based on climate) Coolant: BMW Blue Antifreeze/Coolant (G48 specification) or equivalent ethylene glycol based coolant with corrosion inhibitors. Brake Fluid:...
Crash Control module, Park ventilation with HKR, Rear Window defogger, Integrated climate regulation
Audio And Communication:
Radio/CD player, Radio/HiFi, Cellular Telephone
Convenience Features:
Cruise Control (Tempomat), On Board Computer
Security:
Anti Theft system
Procedures Included
Troubleshooting Methodology:
Step-by-step explanations for diagnosing electrical faults
Diagnostic Tools:
Implied use of diagnostic tools and techniques
Component Identification:
Component Location Chart and Views for easy identification
Wiring Diagrams:
Diagrams for electrical circuits and wiring
Splices And Connectors:
Splice Location Views and Connector Views for electrical junctions
Technical Depth
Depth Of Information:
In-depth technical information, detailed illustrations, and diagrams
User Skill Level:
Suitable for users with basic mechanical knowledge, with clear explanations
Repair Guidance:
Instructions for all repairs, enabling users to get their car running in 100% condition
📊 Manual Specifications
File Format
Format:
N/A (Not specified, but likely printable PDF or physical book)
Print Quality
Quality:
N/A (Not specified, but implied to be of professional workshop standard)
Binding Type
Binding:
N/A (Not specified for digital, typically spiral-bound or perfect-bound for printed manuals)
Paper Type
Paper:
N/A (Not specified for digital, typically durable paper for printed manuals)
⚙️ Engine Specifications
Primary Engine
Engine Code:
M30B34
Engine Type:
3.4L Inline-6 (M30)
Performance
Horsepower:
Approx. 211 hp @ 5700 rpm (for Euro spec, US spec slightly lower)
Torque:
Approx. 224 lb-ft (304 Nm) @ 3700 rpm (for Euro spec, US spec slightly lower)
Fuel System
Fuel Delivery:
Bosch Motronic electronic fuel injection
Engine Management
Control System:
Motronic ECU (detailed in manual)
🔧 Transmission
Standard
Type:
4-speed Automatic (ZF 4HP22)
Optional
Type:
5-speed Manual (Getrag 265)
Features
Electronic Control:
Electronic Transmission Control for automatic transmission (covered in manual)
📐 Dimensions
Exterior
Length:
Approx. 4965 mm (195.5 in)
Width:
Approx. 1800 mm (70.9 in)
Height:
Approx. 1400 mm (55.1 in)
Weights
Curb Weight:
Approx. 1650-1750 kg (3638-3858 lbs), depending on options
🛡️ Safety Features
Ratings
Crash Test Performance:
N/A (Specific ratings for this era may be limited or not directly comparable to modern standards)
Active Features
ABS:
Anti-lock Braking System (ABS) - covered in manual
Passive Features
Srs Airbags:
Supplement Restraint System (SRS) - driver airbag standard, potentially passenger airbag optional (covered in manual)
💡 Technology Features
Infotainment
Audio System:
Optional BMW Bavaria C or Professional RDS radio with CD player integration
Driver Assistance
Cruise Control:
Standard on many models, known as 'Tempomat' in BMW nomenclature
Traction Control:
ASC (Automatic Stability Control) became available later in the E32 production, but ABS was a key safety feature.
Connectivity
Telephone:
Optional integrated cellular telephone system
Comfort Technology
Climate Control:
Integrated climate regulation with automatic temperature control
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 5,000-7,500 miles or 6-12 months, check specific manual for precise details.
Major Service Intervals:
Spark plugs, coolant, brake fluid, transmission fluid typically at 30,000-60,000 mile intervals, refer to specific owner's manual.
Fluid Specifications
Engine Oil:
API SG or higher, SAE 15W-40 or 10W-40 (check specific manual for precise viscosity based on climate)
Coolant:
BMW Blue Antifreeze/Coolant (G48 specification) or equivalent ethylene glycol based coolant with corrosion inhibitors.
Brake Fluid:
DOT 4
Transmission Fluid Auto:
ATF Dexron II or Dexron III (specific ZF fluid may be recommended)
Transmission Fluid Manual:
GL-4 Gear Oil (e.g., SAE 75W-90)
Known Issues
Common Electrical Problems:
Age-related degradation of wiring insulation, failure of central locking pumps, window regulators, heater control valves, ABS sensors, and instrument cluster illumination.
Common Engine Issues:
Oil leaks from valve cover and oil pan gaskets, potential for head gasket issues if overheated, aging fuel injectors.
Common Transmission Issues:
Solenoid failures in automatic transmissions, wear in manual gearbox synchros.
📚 Vehicle History
Brand Heritage
Bmw Legacy:
BMW's reputation for engineering, performance, and luxury motoring
Model Evolution
E32 Introduction:
The E32 generation replaced the E23 7 Series, marking a significant advancement in luxury and technology for BMW.
Production
Production Years E32:
1986-1994
Manufacturing Location:
Germany
🏆 Awards & Recognition
Recognitions
Automotive Press:
The E32 7 Series was generally well-received by automotive press for its comfort, technology, and driving dynamics for its era.
Ratings
Reliability Perception:
While German luxury cars of this period are known for complexity, proper maintenance can yield reliable service. Electrical issues are common with age and are directly addressed by this manual.
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