Circuit/System Testing
WARNING: This page is about a different car, the 2018 Chevrolet Bolt EV. 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 @ T2RR Antenna - Roof Rear
- 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: T2RR Antenna - Roof Rear