Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
- Before testing inspect 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.
- Verify that no other devices are connected to the system during testing.
1. With the scan tool, read Entertainment Telematic Module (ETM/LTM) DTCs and record on the repair order.
2. With the scan tool, erase DTCs.
3. Cycle the ignition switch from on to off, wait five seconds and then back to on.
4. Connect a known good USB device into the USB port.
5. Using the scan tool, read ETM/LTM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE CONNECTORS AND HARNESS
1. Turn the ignition off.
2. Disconnect the USB harness connector at the back of the ETM/LTM.
3. Inspect the connectors and harness between the USB port and the radio.
  Are there any issues with the harness or connectors?
  
  Yes
  - Repair or replace as needed.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the ETM in accordance with the service information. Refer to REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .