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Home >> Cadillac >> 2008 >> DTS 4.6 9 >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Data Communications System) >> Diagnostic Information and Procedures >> Scan Tool Does Not Communicate with Keyword Data Line >> Diagnostic Fault Information
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Diagnostic Fault Information

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Battery Positive Voltage 1 1 - -
Ignition Voltage 1 1 - -
Keyword 2000 Serial Data 1 1 1 -
Module Ground - 1 - -
1. Scan tool does not communicate with keyword 2000 device