This manual covers the BMW 840Ci, 850Ci, and 850Csi models, chassis code E31, produced between 1993 and 1994. These flagship luxury grand tourers, powered by a 4.0L V8 (M60B40), 5.0L V12 (M70B50), or a 5.6L V12 (S70B56), were renowned for their elegant design, sophisticated engineering, and performance. The E31 series represented BMW's commitment to the ultimate driving machine, offering advanced technology and a luxurious driving experience that set it apart from competitors like the Mercedes-Benz SL-Class and Porsche 911 of the era.
This Electrical Troubleshooting Manual provides comprehensive guidance for diagnosing and repairing the complex electrical systems of the BMW 8 Series (E31). It details all electrical systems, including power distribution, engine and transmission controls, safety systems like ABS and SRS, comfort features, and infotainment. The manual includes diagnostic flowcharts, component locations, and detailed troubleshooting procedures essential for owners, mechanics, and technicians to maintain the reliability and performance of these vehicles.
Vehicle produced 9/93 - 5/94
Index
Introduction
Symbols
Power Distribution Chart
Fuse chart
power Distribution
Fuse Details
Ground Distribution
Data Link
Engine Control System
Charging System
Start
Electronic transmission control
Supplement restraint system
Slip control ABS
Power Mirrors
Centrol locking module
Power Windows
Power Seats
Heated Seats
Power Sun Roof
Horn
Wiperwasher Module
Headlight Washer
Windshield washer jet heaters
Instrument cluster
Multi Function Clock
Light switch details
Headlights/Fog lights
Turnhazard lights
Park/Tail/Underhood lights
Licence plate/luggage compartment lights
Back up lights
Brake Lights
Interior Lights
Glove box light/cassete box ashtry lights/charging socket
Crash Control module
Park, ventilation with HKR
Rear Window defogger
Integrated climate regulation
Radio/Cd player
radio/hifi
Cellular Telephone
Cruise Control tempomat
Anti Theft system
on Board Computer
Component Location Chaart
Component Location Views
Splice Location views
Connector views
Vehicle produced 9/93 - 5/94
Index
Introduction
Symbols
Power Distribution Chart
Fuse chart
power Distribution
Fuse Details
Ground Distribution
Data Link
Engine Control System
Charging System
Start
Electronic transmission control
Supplement restraint system
Slip control ABS
Power Mirrors
Centrol locking module
Power Windows
Power Seats
Heated Seats
Power Sun Roof
Horn
Wiperwasher Module
Headlight Washer
Windshield washer jet heaters
Instrument cluster
Multi Function Clock
Light switch details
Headlights/Fog lights
Turnhazard lights
Park/Tail/Underhood lights
Licence plate/luggage compartment lights
Back up lights
Brake Lights
Interior Lights
Glove box light/cassete box ashtry lights/charging socket
Crash Control module
Park, ventilation with HKR
Rear Window defogger
Integrated climate regulation
Radio/Cd player
radio/hifi
Cellular Telephone
Cruise Control tempomat
Anti Theft system
on Board Computer
Component Location Chaart
Component Location Views
Splice Location views
Connector views
