LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2010 >> Escalade EXT >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> Scan Tool Does Not Communicate with Low Speed GMLAN Device >> Diagnostic Fault Information
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Low Speed GMLAN Serial Data (+) 1 2* 1 -
Ground (DLC, terminal 5) - 1* - -
* An open between the data link connector (DLC) and JX 200, or DLC terminal 5 ground will only effect the communication with the scan tool. See Diagnostic Aids.
1. No communication on any low speed GMLAN module
2. No communication on a specific low speed GMLAN module, or group of modules
scientia non olet · About LEMON Manuals