Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW1992850I AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SELF DIAGNOSTICSCOMPONENT RESISTANCE & ENGINE PERFORMANCE SPECIFICATIONS
1992 BMW 850i Automatic
Component Resistance & Engine Performance Specifications
1992 BMW 850i AutomaticSECTION Component Resistance & Engine Performance Specifications
COMPONENT RESISTANCE SPECIFICATIONS
| Component | Resistance | ||
|---|---|---|---|
| Injector Valve | 15-17 Ohms | ||
| Injector Valve Group (3 Valves) | 5.0-6.0 Ohms | ||
| Pulse Generator-Engine Speed/Position | 490-590 Ohms | ||
| Pulse Generator-Cylinder Reference Point | .1-1 Ohm | ||
| Engine Temperature Sensor | |||
| Coolant Temperature 63-74°F (17-23°C) | 2.2-2.7 k/Ohms | ||
| Coolant Temperature 171-181°F (77-83°C) | .30-.36 k/Ohms | ||
| Intake Temperature Sensor | |||
| Air Temperature 63-74°F (17-23°C) | 2.2-2.7 k/Ohms | ||
| Air Temperature 117-127°F (47-53°C) | .8-1.2 k/Ohms | ||
| Fuel Evaporation Valve | 25-65 Ohms | ||
| Ignition Coil | |||
| Primary Winding (Terminal 15/1) | .4-.6 Ohms | ||
| Secondary Winding | |||
| Manufacturer: May & Christe | 8-10 k/Ohms | ||
| Manufacturer: Bosch | 5-7 k/Ohms | ||
ENGINE PERFORMANCE SPECIFICATIONS (NOMINAL VALUES) (1)
| Status Inquiry | Nominal Values | Signal Comes From | |||
|---|---|---|---|---|---|
| Engine Speed | ..... | DME Control Unit | |||
| Idle Speed | 650-750 RPM | Control By EML | |||
| Cut-Out Speed | 5060-6040 RPM | Control By EML | |||
| Injection Signal | 3.8 ms +/- 20 Percent | DME Control Unit | |||
| Load Signal | 2.0 ms +/- 20 Percent | DME Control Unit | |||
| Ignition Angle | 12-18 Degrees Crankshaft Angle (A/T) Or 7-13 Degrees Crankshaft Angle (M/T) | DME Control Unit | |||
| Oxygen Sensor Voltage | .02-.85 Volt. If Oxygen Sensor Is Defective - .45 Volt | Oxygen Sensor | |||
| Intake Air Temperature | Dependent On Ambient Temperature, Approximately -58°F (-50°C) C = Break | Intake Air Temperature Sensor | |||
| Engine Temperature | Dependent On Coolant Temperature, Approximately -22°F (-30°C) C = Break | Engine Temperature Sensor | |||
| Voltage Supply Control Unit | Greater Than 10 Volts | DME Relay | |||
| Oxygen Sensor Heater | ON | DME Control Unit | |||
| Emission Control | On, When Oxygen Sensor Is At Operating Temperature | DME Control Unit | |||
| Mixture Adaption II | -48 To +32 | DME Control Unit | |||
| Mixture Adaption TL | -16 To +16 | DME Control Unit | |||
| Cylinder Reference | ON | Cylinder Reference Sensor | |||
| Fuel Evaporation Control | As Soon As Clock Cycle Active = OPEN | DME Control Unit | |||
| CO Potentiometer (Without Catalytic Converter) CO Volume (No Status Inquiry) | Basic Setting = 1.25 Volt, .2-.12 Percent | CO Potentiometer. Measured Ahead Of Catalytic Converter | |||
| Idle Control | ON | EML Control Unit | |||
| Full Load Signal | Off, At Full Load = ON | EML Control Unit | |||
| Road Speed | With Drive Wheels Raised, Speed Limited To Maximum 19 MPH | Instrument Cluster | |||
| EKP Relay | At Start Or During Engine Operation = ON | DME Control Unit | |||
| DME Main Relay | With Ignition Switched On = ON | DME Control Unit | |||
| Torque Converter Clutch | OFF | EGS Control Unit | |||
| Ignition Angle Intervention | OFF, Briefly Set To ON During Gearshifts | EGS Control Unit | |||
| Drive Range P/N | In Selector Lever Position P Or N = ON | Gear Selector Lever Switch | |||
| DWA/ASC Signal | OFF | DWA Or ABS/ASC Control Unit | |||
| MSR Signal | OFF | ABS/ASC/MSR Control Unit | |||
| Road Speed | With Drive Wheels Raised, Speed Limited To Maximum 19 MPH | Instrument Cluster | |||
| EKP Relay | At Start Or During Engine Operation = ON | DME Control Unit | |||
| DME Main Relay | With Ignition Switched On = ON | DME Control Unit | |||
| Torque Converter Clutch | OFF | EGS Control Unit | |||
| Ignition Angle Intervention | OFF, Briefly Set To ON During Gearshifts | EGS Control Unit | |||
| Drive Range P/N | In Selector Lever Position P Or N = ON | Gear Selector Lever Switch | |||
| DWA/ASC Signal | OFF | DWA Or ABS/ASC Control Unit | |||
| MSR Signal | OFF | ABS/ASC/MSR Control Unit | |||
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RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.