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 MANUALSBMW2001325CI 2D CONVERTIBLE, AUTOMATICREPAIR AND DIAGNOSISELECTRICALBODY ELECTRICALELECTRIC SIGNALS - OVERVIEW
2001 BMW 325Ci 2D Convertible, Automatic
Electric Signals - Overview
2001 BMW 325Ci 2D Convertible, AutomaticSECTION Electric Signals - Overview
- Electronic Signals
- Notes
- Purpose of Signals
- AC Voltage Signals
- Inductive Sensors
- Angle Pulse Generator
- DC Voltage Signals
- Analog Signals
- NTC Sensors
- PTC Sensor
- Potentiometers
- Digital Signals
- Switched B+ Signal
- Switched B- Signal
- Modulated Square Wave
- Hall-Effect Sensors
- Magnetoresistive Sensors
- Designated Value Signals
- Transistor Function
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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.