The rear differential electronic control unit is connected to the CAN bus via the transfer case control module and controls the differential operation using CAN messages from other control units on the network. The main data transmitted to the control unit are: wheel speeds, steering angle, automatic transmission speed, temperature information, vehicle configuration data, axle ratios and mode data.
The control unit also transmits messages about the status of the electronically controlled rear differential to other control modules on the network via the CAN bus. The main data transmitted by the control unit are: clutch torque and the status of the default mode.
The table below shows messages that may appear in the upper instrument cluster message center display that relate to the electronic rear differential:
| Message | Description | Sound alarm |
| 'TRANSMISSION OVERHEAT' 'SLOW DOWN' (gearbox overheating, reduce speed) | The rear differential temperature has reached or is approaching the overheating threshold. | No |
| 'TRANSMISSION FAULT' 'TRACTION REDUCED' (gearbox failure, traction force reduced) | The transfer case control module has stopped transmitting messages on the CAN bus. Defaulting to an open-type center differential. This message also appears if there is a fault with the electronically controlled rear differential. | No |
| 'TRANSMISSION FAULT' 'STOP SAFELY' (gearbox fault, stop in a safe place) | There is a fault in the electronically controlled rear differential. Stop the vehicle as soon as possible. | Single beep |
In vehicles with a lower row instrument cluster, a status lamp is used instead of a message center, which operates on the following principle:
- Yellow color - overheating
- Red color - malfunction, stop the car
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