Tester-Dependent Diagnostic Capability and Fault Isolation

The Tester-Dependent diagnostics allows you to communicate with the GEM through a tester connected to the DLC.

Running a diagnostic test may require the GEM to energize an output device. Some output devices might be limited to the amount of time that they can be actuated. The tester can reactivate the device by exiting the diagnostic test and entering the test again. The GEM will not protect for enter/exit condition of the tester.

During the Tester-Dependent Diagnostics mode, the tester can only command the GEM to perform tests on disabled functions. A response is sent to the tester if a Diagnostic Test request is made on a function that is not disabled. The NGS can request the GEM to activate or deactivate an output device.