Security Gateway Module: Notes

DESCRIPTION 

Courtesy of CHRYSLER GROUP, LLC

The Security Gateway (SGW) Module is located in the instrument panel below the center stack. Refer to MODULE, SECURITY GATEWAY (SGW), REMOVAL AND INSTALLATION .

The SGW module is a security hardware device to stop unwanted access and threats to the Controller Area Network (CAN) for the vehicle. The SGW module does not contain any drivers and therefore does not directly operate or control any vehicle components.

The complexity of in-vehicle networking has led to the development of a variety of bus standards and protocols that are specific to their communication domains. The SGW module serves as the information bridge between these communication domains and the diagnostic scan tool and the radio. Hardware security features of the SGW module are used to prevent unauthorized bus network access.

The SGW module is flash programmable. Failure to flash a newly installed SGW module will leave it in a locked mode. When in the locked mode, the SGW module will not operate.

OPERATION 

The SGW module, located on the CAN architecture between the Data Link Connector (DLC), Body Control Module (BCM), Telematics Box Module, and the Radio prevents threat to the CAN bus systems through the DLC and the radio access points. A secure connection must be present to allow authentication between the SGW module and the diagnostic scan tool. The SGW module contains up to eight dual wire CAN bus channels that comply with the industry standard CAN-Flexible Data-rate (CAN-FD) bus architecture and several Automotive Ethernet networks. The SGW is capable of waking up with a ACC / RUN / START  sense input changing state from OFF  to ACC, RUN  or START  while also capable of waking up in other architectures, with no ACC  , on state change from OFF  to RUN  or START  . The SGW module does support partial networking functionality through the CAN-FD. The SGW module is a framed gateway, that also does provide a signal gateway as a dominant module on several CANs.

For additional information regarding the description and operation of the vehicle communication. Refer to COMMUNICATION, DESCRIPTION AND OPERATION .

For additional information regarding the SGW Diagnostic Trouble Code (DTC) information. Refer to SECURITY GATEWAY MODULE (SGW), DIAGNOSTIC CODE INDEX .

For additional information regarding the communication diagnostics of the SGW module. Refer to COMMUNICATION - NON-DTC BASED DIAGNOSTICS .