Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

Auxiliary Audio Input Jack

Verify no DTCs are present.
- If any DTCs are present
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTCs are present
Ignition ON, radio ON.
Verify the infotainment system switches to AUX as the audio source with the EL-50334-20 Multi-Media Interface Tester (MIT) connected to the auxiliary audio input jack.
- If the infotainment system does not switch to AUX as the audio source
  Refer to Circuit/System Testing - Auxiliary Input Jack.
- Go to next step: If the infotainment system switches to AUX as the audio source
Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT) is heard through the vehicle infotainment system while operating the test tool to begin audio playback.
- If audio is not heard from the test tool.
  Refer to Circuit/System Testing - Auxiliary Input Jack.
- Go to next step: If audio is heard from the test tool.
All OK

USB Port

Verify no DTCs are present.
- If any DTCs are present
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTCs are present
Ignition ON, radio ON.
Verify the infotainment system switches to USB as the audio source with the EL-50334-20 Multi-Media Interface Tester (MIT) connected to the USB port.
- If the infotainment system does not switch to USB as the audio source
  Refer to Circuit/System Testing - USB Port.
- Go to next step: If the infotainment system switches to USB as the audio source
Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT) is heard through the vehicle infotainment system while operating the system to play audio from the test tool.
- If audio is not heard from the test tool.
  Refer to Circuit/System Testing - USB Port.
- Go to next step: If audio is heard from the device
All OK.