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.
ACSM control unit
All inflator assemblies and sensors are connected directly to the ACSM control unit. The ACSM control unit evaluates the data from the sensors. In the event of a collision, the ACSM control unit decides whether seatbelt tensioner and airbag triggering is required and which airbags have to be triggered.
Two acceleration sensors are fitted in the ACSM control unit. The longitudinal acceleration sensor detects frontal or rear-end collisions. The lateral acceleration sensor acceleration sensor detects a side impact.
An ignition capacitor is fitted in the ACSM control unit. If the power supply is interrupted in a collision, the ignition capacitor serves as an energy reserve for the ACSM control unit.
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.