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.
Door open warning lamp
The door open warning lamp function is on cars from between structure weeks 199820 and 199950. The function utilizes the signal transmitted by the central electronic module (CEM) (4/56) on the controller area network (CAN) when a door is opened. The signal is received by the driver door module (DDM) and passenger door module (PDM). The door open warning lamp is then lit in the left (10/60) and right-hand (10/61) front doors. When the door is closed, the central electronic module (CEM) transmits a new signal on the controller area network (CAN). The signal is received by the driver door module (DDM) and passenger door module (PDM) which turns off the relevant door open warning lamp.
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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.