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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 511 (Data Link Communication System) >> Diagnostic Information and Procedures >> DTC U1300, U1301, or U1305 (Generic Short DTC): No Valid Messages Are Detected On The Class 2 Serial Data Circuit >> Symptoms - Data Link Communications
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Symptoms - Data Link Communications

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Important:  The Diagnostic System Check for the system that is malfunctioning must be performed before attempting to use the symptom diagnostics. Refer to CONTROL MODULE REFERENCES in Body Control System for the appropriate Diagnostic System Check.

Review the system operation in order to familiarize yourself with the system functions.

Refer to DATA LINK COMMUNICATIONS DESCRIPTION AND OPERATION .

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