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.
Terminal control
The CAS controls the following terminals via the ignition lock or START/STOP button and slot as follows:
- Terminal R
To maintain the starting capability of the vehicle, the CAS shuts down terminal R automatically. if the driver's door is opened and closed and no seat occupancy is detected, terminal R will be switched off after 16 minutes.
- Terminal 15
The CAS controls terminal 15 (= active positive) for all electrical systems.
- Terminal 15 wake-up wire
When terminal 15 is switched on, the control unit on the PT-CAN are activated by the wake-up wire.
- Terminal 50L and 50L_RS
During the starting operation, terminal 50L is connected to the starter. Terminal 50R_LS is connected to the SMG control unit for clutch control.
- Switched terminal 30g
Some consumers (e.g. SZM, CVM) are now on terminal 30g rather than directly on terminal 30.
Terminal 30g is switched by the CAS. Shutting down the consumers on terminal 30g reduces the off-load current.
NO RELATED
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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.