System Overview: Signals
The table below summarizes the input signals to and output signals from the trailer module (TRM). The signal types are divided into directly connected signals and CAN communication. The illustration below displays the same information with the Volvo component designations.
| Input signals |
Output signals |
| Directly connected: |
Directly connected: |
- Brake light signal from the central electronics module (CEM) (4/56) via the left side tail lamp. (Applies to S80/V70/XC70/S60/V60/XC60 (model year 2013-)).
- Brake light signal from the center high-mounted stop light (CHMSL) (10/19) (For V40 (13-))
|
- To tow hitch cable harness:
- Right turn signal lamp
- Left turn signal lamp
- Stop lamp right
- Stop lamp left
- Parking lamps
- Back-up lamp
- Fog lights
- Charging (+12 V voltage)
|
| Via Controller Area Network (CAN) communication: |
Via Controller Area Network (CAN) communication: |
- Central electronic module (CEM) (4/56)
- •Transmission Control Module (TCM) (4/28)
- •Brake control module (BCM) (4/16)
|
- Central electronic module (CEM) (4/56)
- Driver information module (DIM) (5/1)
- Differential electronic module (DEM) (4/82) (option)
- Obstacle Detection Control Module left (SODL) (4/126) (For V40 (13-))
- Obstacle Detection Control Module right (SODR) (4/127) (For V40 (13-))
- Parking Assistance Module (PAM) (4/86) (option)
- Parking Assistance Camera (PAC) (4/120) (option)
- Engine control module (ECM) (4/46)
- Brake control module (BCM) (4/16)
|
 Courtesy of VOLVO CARS CORPORATION
|