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Home >> Saturn >> 2002 >> Vue 2.2 D, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Data Link Communication System >> Diagnostics >> SAN Tool Does Not Communicate With Class II Device >> Circuit Operation

Circuit Operation

Modules connected to the Class II serial data circuit monitor for serial data communication during normal vehicle operation. Operation and commands are exchanged among the modules. Connecting a scan tool to the DLC allows communication with the modules for diagnostic purposes.

Diagnostic Trouble Codes (DTCs) may be set do to this symptom and during this diagnostic procedure. Complete the diagnostic procedure in order to ensure all the DTCs are diagnosed and cleared from memory.

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