Circuit/System Testing
- Ignition/Vehicle & All vehicle systems - Off
- Disconnect the electrical connector: Navigation Antenna Coaxial Cable @ K73 Telematics Communication Interface Control Module
- Connect the special tool: EL-49903 GM OnStar Antenna Diagnostic Tool Kit @ K73 Telematics Communication Interface Control Module
- Ignition - On/Vehicle - In Service Mode - Infotainment System State - ON
- Verify DTC B2462 is not set.
- If DTC B2462 is set
Replace the component: K73 Telematics Communication Interface Control Module
- Go to next step: If DTC B2462 is not set
- If DTC B2462 is set
- Ignition/Vehicle & All vehicle systems - Off
- Disconnect the electrical connector: Navigation Antenna Coaxial Cable @ T2RR Antenna - Roof Rear
- Perform the following procedure/test: Coax Cable - Component Testing
Verify the procedure/test passes.
- Component Testing = Failed
Replace the component: Navigation Antenna Coaxial Cable
- Go to next step: If the components test normal
- Component Testing = Failed
- Replace the component: T2RR Antenna - Roof Rear