Power and Signal Distribution

All Description and Operation

• Data Link Communications Description and Operation

Diagnostic Procedures

• Data Link References
• Scan Tool Does Not Communicate with CAN Device
• 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 U0073
• DTC U0100-U0299

Electrical/Electronic Schematic Diagrams

• Data Communication Schematics