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Home >> Jeep >> 2025 >> Compass Latitude >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Audio (Radio) (ETM) - DTCS B143A-1A To B1578-13 >> DTC Troubleshooting >> B1561-11 Cellular Antenna 2-Circuit Short To Ground >> Diagnostic Test

Diagnostic Test

  1. CHECK THE ANTENNA CONNECTION 
    1. Turn the ignition off.
      NOTE:

      Before performing the diagnostic test, please make sure that 9977-6-CELL-UPD 10K OHM jumper is connected to the 9977-6 test antenna. 

    2. Disconnect the Antenna connector at the back of the Radio.
    3. Inspect the Antenna connections.

      Are the Antenna connections clean and secure?

      Yes 

      • Go To  2

      No 

      • Repair the Antenna connection as needed.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  2. CHECK THE ANTENNA AND CABLE 
    1. Connect the 9977-6-CELL test antenna

      (special tool #9977-6-CELL, Adapter, Cellular Antenna Diagnostic)

    2. Make sure one of the front doors is still open.
    3. Using the scan tool, erase the DTCs.
    4. Turn the ignition on.
    5. Turn the Radio on.
    6. Using the scan tool, read the active Radio DTCs.

      Does the scan tool read: B1560-11-CELLULAR ANTENNA 1 - CIRCUIT SHORT TO GROUND as active?

      Yes 

      No 

      • Go To  3
  3. TEST THE ANTENNA CABLE 
    1. Disconnect the Antenna cable at the base.
    2. Connect the appropriate Adapter to the Antenna cable at the back of the Radio.

      (special tool #9977-6-1, Adapter)

      GC0214830Courtesy of CHRYSLER GROUP, LLC

      (special tool #9977-6-3, Adapter)

      GC0214828Courtesy of CHRYSLER GROUP, LLC
    3. Connect the appropriate Jumper to the Antenna cable at the Antenna base.

      (special tool #9977-6-4, Jumper)

      GC0214827Courtesy of CHRYSLER GROUP, LLC

      (special tool #9977-6-2, Jumper)

      GC0214829Courtesy of CHRYSLER GROUP, LLC
    4. Measure the Resistance across the tool terminals.

      Is the resistance below 47.5 Ohms?

      Yes 

      • Use the (special tool #9977-6, Kit, Radio Antenna Diagnostic) to locate the short together, repair or replace the Antenna cable as necessary.
        GC0214818Courtesy of CHRYSLER GROUP, LLC
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Replace the Antenna base in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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