Circuit/System Testing
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition/Vehicle & All vehicle systems - Off
- Disconnect the electrical connector:Cellular Phone Antenna Circuit - Coax 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
- Verify DTC B2470 is not set.
- If DTC B2470 is set
Replace the component:K73 Telematics Communication Interface Control Module
- Go to next step: If DTC B2470 is not set
- If DTC B2470 is set
- Ignition/Vehicle & All vehicle systems - Off
- Disconnect the electrical connector:Cellular Phone Antenna Circuit - Coax Cable@T4G Cellular Phone, Navigation, and Digital Radio Antenna
- Perform the following procedure/test:Coax Cable - Component Testing
Verify the procedure/test passes.
- Component Testing = Failed
Replace the component:Cellular Phone Antenna Circuit - Coax Cable
- Go to next step: If the components test normal
- Component Testing = Failed
- Replace the component:T4G Cellular Phone, Navigation, and Digital Radio Antenna