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Home >> Chevrolet >> 2004 >> Venture Base, Van Cargo Extended >> Repair and Diagnosis >> External Pages >> Different car >> Section 158 (Data Link Communications System) >> Diagnostic Information and Procedures >> Scan Tool Does Not Communicate with Class 2 Device >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information 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 due 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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