Gateway Module
The GWM is mounted under the driver side instrument panel. The OBD connector is fitted to the GWM. The GWM acts as a central gateway to translate messages across all 4 or 5 (optional) vehicle controller area networks (CAN). The GWM is the only module on this 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 DLC are HS-CAN1 (DIAG 1) and HS-CAN2 (DIAG 2). These 2 networks communicate directly with the diagnostic scan tool. The other 2 or 3 (optional) communication networks, communicate on the network, but do not communicate directly with the diagnostic scan tool. The GWM translates the messages from these networks to the HS-CAN2 (DIAG 2), which transfers the signals to the diagnostic scan tool.