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.
2002 BMW 745LiFACTORY OEM SERVICE PROCEDURE
Intelligent Safety Integration System - Overview
- Intelligent Safety Integration System (ISIS)
- Notes
- Purpose of the System
- Components
- System Overview
- Notes
- Legend For System Overview
- Safety Information Module (SIM)
- Notes
- Power Supply Of The SIM During Operation
- Electrical Power Supply In The Event Of A Crash
- Closed-Circuit Current Cutout
- Intelligent Distributor
- Intelligent Star Coupler
- Byteflight Master
- Synchronization Pulses
- Watchdog Function
- System Time
- Synchronization Of The System Time
- Synchronization In Normal Operation
- Self-Diagnosis Of The ISIS
- Self-Diagnosis Of The SIM
- Pre-Drive Check
- Pre-Drive Check, Phase 1
- Pre-Drive Check, Phase 2
- Self-Diagnosis During Operation
- Byteflight
- A-Pillar Satellite, Left And Right (SASL/SASR)
- A-Pillar Satellite Sensors
- B-Pillar Satellite, Left (SBSL)
- B-Pillar Satellite, Right (SBSR)
- Seat Satellite, Driver / Passenger (SSFA / SSBF)
- Seat Satellite, Rear (SSH)
- Front Door Satellite, Left/Right (STVL/STVR)
- Vehicle Center Satellite (SFZ)
- Steering Column Switch Center (SZL)
- Central Gateway Module (ZGM)
- Driver Airbag
- Passenger Airbag
- Knee Airbags
- Advanced Head Protection System (AHPS)
- Side Airbags
- Front Belt Tension Limiter
- Front Seatbelt Tensioners
- Rear Seatbelt (End Fitting) Tensioner
- Seat Occupancy Detection
- Seatbelt Buckle Switch
- Active Head Restraint System (AKS)
- Battery Safety Terminal (BST)
- Principle of Operation
- Workshop Hints
- Review Questions
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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