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Home >> Jeep >> 2024 >> Gladiator High Tide, Full Time T/Case Control, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio (Radio) - DTCS B1562-12 To B157A-11 >> DTC Troubleshooting >> B1577-13 Universal Consumer Interface (UCI) - Circuit Open >> Diagnostic Test

Diagnostic Test

  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECU's) and record on the repair order.
    2. With the scan tool, run a vehicle Scan Report, or record the Environmental Data related to the DTCs.
    3. NOTE: A front door must remain open whenever checking or erasing Radio DTCs. 
    4. With the scan tool, record and erase the Radio DTCs.
    5. Cycle the ignition switch from on to off, wait five seconds and then back to on.
    6. Turn the Radio on and set the volume to 25.
    7. Adjust the speakers to the front and center.
    8. With the scan tool, read the active Radio DTCs.
      NOTE:

      A front door must remain open whenever checking or erasing Radio DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. 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 and USB cable that works on a similar system when testing for concerns.
    • Verify that 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  3

      No 

      • Repair the cable connection as needed.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .
  3. 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 :
      • (X486) Aux Audio Left circuit between the Radio harness connector and the Media Hub connector.
      • (X487) Aux Audio Right circuit between the Radio harness connector and the Media Hub connector.
      • (X488) Aux Audio Reference 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.

      Is the resistance below 3.0 Ohms on all circuits?

      Yes 

      • Go To  4

      No 

      • Repair the open circuit that failed the test.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .
  4. CHECK THE MEDIA HUB 
    1. Replace the Media Hub in accordance with service information. Refer to MEDIA HUB, REMOVAL AND INSTALLATION .
    2. NOTE: A front door must remain open whenever checking or erasing Radio DTCs. 
    3. With the scan tool, record and erase the Radio DTCs.
    4. Cycle the ignition switch from on to off, wait five seconds and then back to on.
    5. Turn the Radio on and set the volume to 25.
    6. Adjust the speakers to the front and center.
    7. With the scan tool, read the active Radio DTCs.

      Did the DTC return?

      Yes 

      • Go To  5

      No 

      • Replacement of the Media Hub corrected the concern.
      • Test complete.
  5. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all Radio harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Reconnect all Radio harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read Radio DTCs.

      Did the DTC return?

      Yes 

      • Replace the Radio in accordance with the Service information.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .

      No 

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