LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Data Communications >> Diagnostic Information and Procedures >> Scan Tool Does Not Communicate with High Speed GMLAN Device >> Diagnostic Fault Information

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
High Speed GMLAN Serial Data (+) 1 2* 1 -
High Speed GMLAN Serial Data (-) 1 2* 1 -
Ground (DLC, terminal 5) - 1 - -
Battery Positive Voltage (B+) 1 1 - -
* An open between the data link connector (DLC) and the first splice will only effect the communication with the scan tool. The vehicle modules will still communicate.
  1. No communication on any high speed GMLAN module
  2. An open in only one high speed GMLAN serial data circuit may allow degraded communication between the modules
scientia non olet · About LEMON Manuals