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Home >> Hummer >> 2010 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Data Communication System) >> Diagnostic Information and Procedures >> Scan Tool Does Not Communicate with Class 2 Device >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2010 GMC Canyon and 2010 Chevrolet Colorado. 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
Class 2 Serial Data 1 U1001-U1254 1 -
Ground (DLC, terminal 5) - 1* - -
* An open in the DLC ground circuit terminal 5 will only effect the communication with the scan tool. The vehicle modules will still communicate.
1. No communication on any class 2 serial data module