Wiring Diagram Cluster
1991 BMW 850i Engine Management Wiring Diagram
Find ECU/PCM wiring, fuel injector circuits, ignition coil paths, and oxygen sensor schematics for engine diagnostics.
Matched Diagrams
48
Variant Used
850i (E31) V12-4988cc 5.0L SOHC (M70)
Total Vehicle Diagrams
1407
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Factory Manual Evidence
When there is no clean repair shortcut for this system, drop into the OEM manual sections that usually carry the authoritative test path.
1991 BMW 850i 1211/2211 - Control Module (DME) →Diagnostic signal
Codes Often Seen With This System
Use the code cluster when wiring faults overlap with check-engine or module-level diagnostics.
P0301: Cylinder 1 Misfire Detected →Top Engine Management Diagram Paths
1.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Engine Control ModuleGeneralOpen2.Electrical Diagrams > Powertrain Management > System Diagram > Electronic Throttle ControlGeneralOpen3.Computers and Control Systems — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Powertrain ManagementOpen4.Cooling System — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Engine, Cooling and ExhaustOpen5.Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Powertrain ManagementOpen6.Electrical Diagrams > Electronic Throttle ControlPowertrain ManagementOpen7.Transmission Control Systems — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Powertrain ManagementOpen8.Air Bag Systems — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Restraints and Safety SystemsOpen9.Antilock Brakes / Traction Control Systems — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Brakes and Traction ControlOpen10.Antitheft and Alarm Systems — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Accessories and Optional EquipmentOpen11.Automatic Transmission/Transaxle — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Transmission and DrivetrainOpen12.Backup Lamp — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Lighting and HornsOpen13.Brake Lamp — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Lighting and HornsOpen14.Charging System — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Starting and ChargingOpen15.Cigarette Lighter — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Instrument Panel, Gauges and Warning IndicatorsOpen16.Courtesy Lamp — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Lighting and HornsOpen17.Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)GeneralOpen18.Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Heating and Air ConditioningOpen19.Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Instrument Panel, Gauges and Warning IndicatorsOpen20.Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Power and Ground DistributionOpen21.Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Wiper and Washer SystemsOpen22.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Warning Indicators > Check EngineGeneralOpen23.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Warning Indicators > Electronic Throttle Control (EML)GeneralOpen24.Electrical Diagrams > Powertrain Management > Accelerator PedalGeneralOpen25.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Body Control Module > Electrical DiagramsGeneralOpen26.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Body Control Module > Pin Assignments > AdapterGeneralOpen27.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Body Control Module > Pin Assignments > ConnectorGeneralOpen28.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Body Control Module > Pin Assignments > Pin Assignments at Connector X39, 26-Pole (Green)GeneralOpen29.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Body Control Module > Pin Assignments > Pin Assignments at Connector X40, 26-Pole (Brown)GeneralOpen30.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Body Control Module > Pin Assignments > Pin Assignments at Connector X41, 26-Pole (Blue)GeneralOpen31.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Body Control Module > Pin Assignments > Pin Assignments at Connector X42, 5-PoleGeneralOpen32.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Central Electronics BoxGeneralOpen33.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Data Link Connector > Instrumentation Bus (I-Bus)GeneralOpen34.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Data Link Connector > Pin 13GeneralOpen35.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Data Link Connector > Pins 1 and 12GeneralOpen36.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Data Link Connector > Pins 18 and 19GeneralOpen37.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Data Link Connector > Pins 7, 11, 14 and 16GeneralOpen38.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Data Link Connector > Receiving Data Circuit (RXD)GeneralOpen39.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Data Link Connector > Transmitting Data Circuit (TXD)GeneralOpen40.Electrical Diagrams > Powertrain Management > Computers and Control Systems > System DiagramGeneralOpen41.Electrical Diagrams > Powertrain Management > System Diagram > Motronic Control Unit I (CYL 1 - 6)GeneralOpen42.Electrical Diagrams > Powertrain Management > System Diagram > Motronic Control Unit II (CYL 7 - 12)GeneralOpen43.Electrical Diagrams > Warning Indicators > Check EngineInstrument Panel, Gauges and Warning IndicatorsOpen44.Electrical Diagrams > Warning Indicators > Electronic Throttle Control (EML)Instrument Panel, Gauges and Warning IndicatorsOpen45.Fog/Driving Lamp — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Lighting and HornsOpen46.Headlamp — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Lighting and HornsOpen47.Horn — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Lighting and HornsOpen48.Instrument Cluster / Carrier — Diagram Information and Instructions > Component, Connector, Splice, Fuse and Ground Locations > Fuse and Fusible Links > Front (LH Rear of Engine Compartment)Instrument Panel, Gauges and Warning IndicatorsOpen
Parts & Tools for This Job
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Exact Vehicle Hub
Browse →OEM Manual Evidence
Browse →1991 BMW 850i 1211/2211 - Control Module (DME)OEM Manual
1211/2211 - Control Module (DME) — 1991 BMW 850i (E31) V12-4988cc 5.0L SOHC (M70) Service Manual ~ LEMON Manuals LEMON Manuals: Repair Know...
1991 BMW 850i 1991 Model Alpine And Pioneer Anti-Theft Radios And Cd Changers (65 05 90 (3132))OEM Manual
1991 Model Alpine And Pioneer Anti-Theft Radios And Cd Changers (65 05 90 (3132)) — 1991 BMW 850i Automatic Service Manual ~ LEMON Manuals...
1991 BMW 850i 1991 Model Alpine And Pioneer Anti-Theft Radios And Cd Changers (65 05 90 (3132))OEM Manual
1991 Model Alpine And Pioneer Anti-Theft Radios And Cd Changers (65 05 90 (3132)) — 1991 BMW 850i Standard Service Manual ~ LEMON Manuals L...
1991 BMW 850i 50-Amp Clamp For Gt1 (04 16 04)OEM Manual
50-Amp Clamp For Gt1 (04 16 04) — 1991 BMW 850i Automatic Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >>...
Likely Trouble Codes for This System
Browse →P0301: Cylinder 1 Misfire DetectedCode
Ignition code commonly seen during engine management diagnosis.
P0030: HO2S Heater Control Circuit (Bank 1, Sensor 1)Code
Emissions code commonly seen during engine management diagnosis.
P0300: Random/Multiple Cylinder Misfire DetectedCode
Ignition code commonly seen during engine management diagnosis.
P0351: Ignition Coil A Primary/Secondary CircuitCode
Ignition code commonly seen during engine management diagnosis.
P0352: Ignition Coil B Primary/Secondary CircuitCode
Ignition code commonly seen during engine management diagnosis.
P0353: Ignition Coil C Primary/Secondary CircuitCode
Ignition code commonly seen during engine management diagnosis.
More 850i Wiring Pages
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