Gateway Module
WARNING: This page is about a different car, the 2020 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Right hand drive vehicles are equipped with a remote data link connector (DLC) connected to the gateway module (GWM) to interface with the diagnostic scan tool.
The GWM acts as a central gateway to translate messages across all 5 vehicle controller area networks (CAN). The GWM is the only module on the vehicle with this ability. The GWM also serves as a termination module for each of the networks to which it is connected.
The 2 module communication networks connected to the remote DLC are DIAG 1 and DIAG 2. These 2 networks communicate with the diagnostic scan tool. The other 5 communication networks, communicate on the network, but do not communicate directly with the diagnostic scan tool. The GWM translates the messages from the HS-CAN1 to DIAG 1. The GWM translates messages from the HS-CAN2, HS-CAN3, HS-CAN4 and MS-CAN to the DIAG 2 which transfers the signals to the diagnostic scan tool.