Data Communications for Chevrolet HHR 2009

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

• Control Module U Code List
• DTC B1000
• DTC B1001
• DTC B1004
• DTC B1009
• DTC C0550
• DTC U0001
• DTC U0073
• DTC U0100-U0299
• DTC U2103
• DTC U2105-U2199

Electrical/Electronic Schematic Diagrams

• Body Control System Schematics
• Data Communication Schematics

Mechanical Specifications

• Fastener Tightening Specifications

Removal, Installation, and Replacement

• Body Control Module Replacement
• Data Link Connector Replacement