What does this module do?
The trailer module drives the lighting and brake signals at the towbar socket and informs other modules when a trailer is attached.
What do the makes call this module?
The name of a module doing the same job changes from make to make. The names below are the actual definition names used under this type in the CarCoding scan map (5 distinct names):
| Module name | Address |
|---|---|
| Bend angle sensor for trailer (MEB/EVO) | 17FC168B |
| Bend angle sensor for trailer (MEB/EVO) | 17FC168B |
| TBM (Trailer Brake) | 757 |
| TRM (Trailer Module) | 791 |
| Trailer Control | 1C400047 |
| Trailer Control | 1C400047 |
| Trailer Weight Nose Weight Detection | 17FC1690 |
| Trailer Weight Nose Weight Detection | 17FC1690 |
Which makes define it?
The map holds 8 definitions for this type, spread across 3 make groups:
Address and protocol
Every definition in the map is marked as UDS. 2 of the addresses are 11-bit CAN identifiers (three digits, such as 7E0) and 6 are 29-bit extended identifiers (such as 18DA10F1). The most frequent addresses for this type are: 17FC168B (2), 17FC1690 (2), 1C400047 (2), 757 (1).
Other module types
Trailer Module on your own vehicle
With an ELM327-based BLE OBD2 adapter, CarCoding scans the vehicle’s modules, reads fault codes from those it can reach and explains every code in plain language. Which modules are reachable depends on the make and on the vehicle. The app is free to download.
Some advanced features require an in-app purchase.
Data source: the CarCoding ECU scan map (ecuDatabase.ts). The addresses and names in the table are definitions from the map; they can differ depending on the hardware and software version in your vehicle.