Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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 5 vehicle Controller Area Networks (CANs). 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 DLC are DIAG1 and DIAG2. These 2 networks communicate directly with the diagnostic scan tool. The other 5 communication networks do not communicate directly with the diagnostic scan tool. The GWM translates the messages from the HS-CAN1 to DIAG1. The GWM translates messages from the HS-CAN2, HS-CAN3, HS-CAN4 and MS-CAN to DIAG2 which transfers the signals to the diagnostic scan tool.
| Item | Description |
|---|---|
| 1 | GWM |
| 2 | DIAG2 Transceiver |
| 3 | Transceiver |
| 4 | Transceiver |
| 5 | Transceiver |
| 6 | Transceiver |
| 7 | Transceiver |
| 8 | DLC |
| 9 | DIAG1 Transceiver |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.