2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 552
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
OnStar Description and Operation (See: Accessories and Optional Equipment/Description and Operation/OnStar)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Special Tools
EL-49903 GM OnStar Antenna Diagnostic Tool Kit
Circuit/System Verification
Verify that the T4G cellular phone antenna and T4G cellular phone antenna coupling assembly are not damaged.
If the antenna assembly is damaged, replace the T4G cellular phone antenna.
Circuit/System Testing
1. Ignition OFF, disconnect both the GPS and cell coax cable connectors at the K73 telematics communication interface control module.
2. Connect the EL-49903 to the K73 telematics communication interface control module.
3. Clear the DTCs and operate the vehicle within the conditions for running the DTC. Verify DTC B2470 does not set.
瀚慖f the DTC sets, replace the K73 telematics communication interface control module.
4. Ignition OFF, disconnect the EL-49903 from the K73 telematics communication interface control module, and the antenna coax from the
T4G cellular phone antenna.
5. Ignition ON, test for less than 1 V between the antenna coax center terminal and ground.
瀚慖f greater than the specified range, replace the antenna coax.
6. Ignition ON, test for less than 1 V between the antenna coax outer shield and ground.
瀚慖f greater than the specified range, replace the antenna coax.
7. Test for infinite resistance between the antenna coax center terminal and ground.
瀚慖f less than the specified value, replace the antenna coax.
8. Test for infinite resistance between the antenna coax outer shield and ground.
瀚慖f less than the specified value, replace the antenna coax.
9. Test for less than 5 Ohms at the cellular antenna coax center terminal from end to end.
瀚慖f greater than specified value, replace the antenna coax.
10. Test for less than 5 Ohms at the cellular antenna coax outer shield from end to end.
瀚慖f greater than specified value, replace the antenna coax.
11. Test for infinite resistance between the antenna coax center terminal and the outer shield.
瀚慖f less than specified value, replace the antenna coax.
12. If coax cable tests normal, replace the T4G cellular phone antenna.
