2010 Cadillac CTS Sedan AWD V6-3.6L Page 481
Conditions for Setting the DTC
B2462 02
The telematics communication interface control module detects a short to ground on the navigation antenna signal circuit.
B2462 04
The telematics communication interface control module detects an open/high resistance on the navigation antenna signal circuit.
Action Taken When the DTC Sets
* The OnStar(R) status LED turns red.
* The OnStar(R) Call Center cannot locate the vehicle.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.
Reference Information
Schematic Reference
* OnStar Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/OnStar Schematics)
* Antenna Coaxial/Connector Cable Identification Table (See: Accessories and Optional Equipment/Antenna/Antenna, Radio/Antenna
Cable/Application and ID)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
OnStar Description and Operation (See: Accessories and Optional Equipment/Description and Operation/OnStar Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/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
Note: The following verification requires the vehicle to be outside with an unobstructed view of the southern sky. Allow 5 minutes after turning
key on for the GPS satellites to acquire vehicle signal.
Ignition ON, wait 5 minutes, then contact the OnStar call center consultant by pressing the blue OnStar button. A call center consultant should
answer the call, verifying the vehicle OnStar system is functioning and the consultant can locate the vehicle.
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, place the test antenna on the roof of the vehicle.
3. Ignition ON, wait 5 minutes, then contact the OnStar call center consultant by pressing the blue OnStar button. A call center consultant
should answer the call, ask the consultant to verify the vehicle location to confirm the GPS system is functioning.
瀚慖f the OnStar GPS does not function, replace the K73 telematics communication interface module.
4. Ignition OFF, perform the coax cable test on the coax cable, refer to Component Testing. The coax cable should pass the test.
瀚慖f the coax cable does not pass the test, replace the coax cable.
