Car Sharing Module
The Car Sharing Module (CSM) is a control unit with an ID reader for private and joint car sharing.
The vehicles can be reserved either online or borrowed spontaneously (green LED on the ID reader is lit).
The electronic immobilizer in the Body Domain Controller (BDC) control unit is activated via the K-CAN2 of the Car Sharing Module (CSM). The central information display, which is connected to the headunit, serves as the display.
Apps (Android) run on the Car Sharing Module for use by customers and as assistance for inexperienced drivers. These apps output car sharing-specific displays. Settings can be made via the controller (CON).
A card is required for customer authentication for access to the vehicle and release of the electronic immobilizer via the Car Sharing Module (CSM).
Brief component description
Car sharing module (CSM)
2 microprocessors are integrated in the Car Sharing Module.
One microprocessor manages the following interfaces:
- CAN bus interface (Controller Area Network)
- LIN bus interface (Local Interconnect Network)
- Near Field Communication interface (NFC, ID reader)
- Card reader interface (= Radio Frequency Identification RFID, additional cards)
- SIM card and GSM antenna interface (= Global Standard for Mobile Communication GSM, Subscriber Identity Module SIM)
- Terminal 30 interface (DC/DC converter)
The Car Sharing Module is locked in the base plate in the center console.
Additional cards (refueling, park, charging) are inserted in a holder in the Car Sharing Module and monitored by the CSM control unit. A label (RFID with 125 kHz) is stuck onto additional cards so that they can be monitored.
| Item | Explanation |
|---|---|
| 1 | Car sharing module (CSM) |
| 2 | 18-pin plug connection |
The Car Sharing Module is a further development with the following features:
- Low standby current consumption
- Stable online connection
- High safety standard
- Optimized conversion
- Service capability in the dealer organization
- Quality in series production
ID reader
The label of the vehicle fleet operation is stuck onto the inside of the windshield on the driver's side.
The ID reader is stuck into this label.
The Car Sharing Module (CSM) is connected with the ID reader via LIN bus. The ID reader is connected via a 4-pin plug connection.
There are 3 LEDs (red, yellow and green) on the ID reader which indicate the status for car sharing.
A card is required for customer authentication for access to the vehicle and release of the electronic immobilizer via the Car Sharing Module (CSM). This card must be held against the ID reader.
| Item | Explanation |
|---|---|
| 1 | ID reader |
| 2 | 4-pin plug connection |
| 3 | LED red |
| 4 | LED yellow |
| 5 | LED green |
System functions
Vehicle behavior
Vehicle awake:
CAN messages are received. Communication on the CAN bus is active. The Car Sharing Module is woken via the K-CAN2.
Reasons that keep the vehicle awake:
- The Car Sharing Module (CSM) keeps the vehicle awake (message on the bus) for acceptance of the reservation. If necessary, extension of terminal 30B (coastdown) is requested.
- Operation of the controller (CON).
Vehicle asleep:
CAN messages are not received. The CSM control unit no longer participates in communication on the CAN bus. Communication on the online connection is possible when the vehicle is asleep.
Reasons that wake the vehicle:
- Authentication via the ID reader.
- Specific online services such as welcoming the customer via the blink LEDs on the ID reader.
Functional networking of Car Sharing Module (CSM)
The following illustration shows the functional networking.
Example F56
| Item | Explanation |
|---|---|
| 1 | ID reader |
| 2 | Central information display |
| 3 | Power distribution box |
| 4 | Body Domain Controller (BDC) |
| 5 | CAN bus terminal resistor |
| 6 | Base plate with Car Sharing Module (CSM) |
| 7 | Roof antenna |
| 8 | Headunit (HU-H, HU-B) |
Notes for Service Technician
General notes
Notes on programming
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