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.
Alarm (2008-2012): Function: Activation
When the central electronic module (CEM) receives a lock command, it first locks the central locking system and then activates the alarm. On cars with the keyless entry system, the lock command is transmitted from the keyless vehicle module (KVM) to the central electronic module (CEM). The alarm LED starts to flash as soon as the system has been activated. However, the central electronic module (CEM) will not refer to these signals until after approximately 11 seconds (or until the deadlocks are activated as part of central locking, which happens after approximately 10 seconds).
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.