Information Transmitted Via the CAN Interface

Information Transmitted Via The CAN Interface

The system communicates the following climate-relevant operating and ambient conditions via the CAN interface:
- Outside temperature (via CAN from the front-end control unit)
- Coolant temperature
- Vehicle speed (to assess the fresh air intake temperature)
- Engine speed
- Request 'Defrost rear window/door mirrors' (status on/off via CAN on the vehicle electrical system control unit)
- Convertible top or sliding roof open/closed
- Dimming
- Wipe/wash signal
- Request - seat heating left (status on/off via CAN on the vehicle electrical system control unit)
- Request - seat heating right (status on/off via CAN on the vehicle electrical system control unit)
- Interior temperature (actual temperature)
- Request - a/c compressor (status on/off via CAN on the DME engine control unit)
- Pressure signal (indirect request for condenser cooling through provision of coolant pressure via CAN)
- A/C shut-down (e.g. high- and low-pressure shut-down)
- Diagnosis
- Stationary period since "ignition off"