LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Data Communication System) >> Diagnostic Information and Procedures >> Scan Tool Does Not Communicate with High Speed GMLAN Device >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. 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
High Speed GMLAN Serial Data Bus (+) 1 2 1 -
High Speed GMLAN Serial Data Bus (-) 1 2 1 -
Ground (DLC pin 5) - 1 - -
1. No communication on any high speed GMLAN module
2. An open in only one high speed GMLAN serial data circuit will allow degraded communication between the modules
scientia non olet · About LEMON Manuals