Diagnostic Test

CHECK THE CABLE CONNECTION AT THE RADIO
NOTE:
- Before testing check the AUX port, USB port and SD slot for damage or debris inside the ports and device connectors that can cause concerns with system operation.
- Use a known good compatible device that works on another same kind system when testing for concerns.
- Check to be sure no other devices are connected to the system during testing.
- The Media hub (with USB, AUX, SD slot) can be serviced separately from the radio.
1. Turn the ignition off.
2. Inspect the connectors at the radio and Media Hub.
  Are The connections secure and undamaged?
  
  Yes
  - Go To 2
  No
  - Repair the cable connection as needed.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE MEDIA HUB CIRCUITS FOR AN OPEN.
1. Turn the ignition off.
2. Disconnect the Radio harness connector and the Media hub connector.
3. Measure the resistance of the :
  - (X521) Aux Audio Left circuit between the Radio harness connector and the Media Hub connector.
  - (X522) Aux Audio Right circuit between the Radio harness connector and the Media Hub connector.
  - (X519) Aux Audio Common circuit between the Radio harness connector and the Media Hub connector.
  - (X489) Aux Connection Detect circuit between the Radio harness connector and the Media Hub connector.
  - (X422) Aux UCI/ USB Power circuit between the Radio harness connector and the Media Hub connector.
  - (F981) Aux Fused Ignition Run/ ACC Control Output circuit between the Radio harness connector and the Media Hub connector.
  - (Z921) Aux Ground circuit.
  Is the resistance below 5.0 Ohms on all circuits?
  
  Yes
  - Check the Media Hub for concerns and replace if needed.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the open circuit that failed the test.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .