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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 137 (Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> Auxiliary Audio Input Malfunction (IOS/IOT/IOU) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 GMC Terrain and 2018 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, infotainment system ON.
  2. Connect the EL-50334-20 Multi-Media Interface Tester (MIT) to the X92 USB Receptacle port inside the center console and select the USB test mode.
  3. Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT) is heard through the 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 Ports (Inside Center Console)

    • Go to next step: If audio is heard from the test tool 
  4. Connect the EL-50334-20 Multi-Media Interface Tester (MIT) to the X83 Auxiliary Audio Input 3.5 mm (1/8 in.) input jack and select the AUX test mode.
  5. Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT) is heard through the 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 - Auxiliary Audio Input Jack, USB Port and SD Card Reader (Front Floor Console).

    • Go to next step: If audio is heard from the test tool. 
  6. Ignition ON, infotainment system ON.
  7. Connect the EL-50334-20 Multi-Media Interface Tester (MIT) to the X83 Auxiliary Audio Input USB port (Front Floor Console) and select the USB test mode.
  8. Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT) is heard through the infotainment system while operating the system to play audio from the test tool.
    • If audio is not heard from the test tool 
    1. Insert the correct SD card for the vehicle into the SD card slot.
    2. Verify map data can be accessed by selecting Navigation.
    • If the SD card reader cannot be accessed, refer to Circuit/System Testing - Auxiliary Audio Input Jack, USB Port and SD Card Reader (Front Floor Console).
    • If the SD card reader can be accessed, replace the X83 Auxiliary Audio Input.
    • Go to next step: If audio is heard from the test tool 
  9. All OK
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