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Home >> Oldsmobile >> 2004 >> Bravada AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1729 (Computer/Integrating Systems) >> Diagnostic Information and Procedures >> DTC U1300, U1301, or U1305: Class 2 Data Link Low, Class 2 Data Link High, Class 2 Data Link Low or High (5.3L) >> Circuit Description
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Circuit Description

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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. In addition to this, Node Alive messages are transmitted by each module on the class 2 serial data circuit about once every 2 seconds.

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