Data Communications for Cadillac STS 2008

All Description and Operation

• Body Control System Description and Operation
• Data Link Communications Description and Operation

Diagnostic Procedures

• Data Link References
• Diagnostic Starting Point - Data Communications
• Scan Tool Does Not Communicate with High Speed GMLAN Device
• Scan Tool Does Not Communicate with Low Speed GMLAN Device
• Scan Tool Does Not Power Up
• Symptoms - Data Communications

Diagnostic Trouble Codes

• DTC B1000
• DTC B1004
• DTC B1009
• DTC U0002
• DTC U0073 or U2100
• DTC U0100-U0299 or U2105-U2199
• DTC U0123
• DTC U0126
• DTC U0144
• DTC U1820
• DTC U1822
• DTC U1823
• DTC U1824
• DTC U1825
• DTC U1826 or U1827
• DTC U2102 or U2103

Electrical/Electronic Schematic Diagrams

• Body Control System Schematics
• Data Communication Schematics

Removal, Installation, and Replacement

• Body Control Module Replacement
• Door Control Module Replacement
• Rear Integration Body Control Module Replacement