System overview: Signals
The chart below summarizes input and output signals to and from the driver information module. The signal types are divided into directly connected signals, serial communication and Control area network (CAN) communication. The illustration below displays the same information with the Volvo part numbers.
| Input signals | Output signals |
| Directly connected: | Directly connected: |
| Parking brake switch, 3/47 | |
| Malfunction indicator lamp (MIL) | |
| Brake fluid level sensor, 7/4 | |
| Via Control Area Network (CAN): | Via Control Area Network (CAN): |
| Brake control module (ABS), 4/16 | Brake control module (ABS), 4/16 |
| Central electronic module, 4/56 | Central electronic module, 4/56 |
| ECM, 4/46 | Phone module, 16/60 |
| Phone module, 16/60 | SRS, 4/9 |
| SRS, 4/9 | RTI,16/45 |
| TCM (4/28) | Climate control module, 3/112 |
| Rear electrical module, 4/58 | |
| Steering wheel module, 3/130 |