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Home >> Jeep >> 2021 >> Gladiator Mojave, Part Time T/Case Control, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Audio/Video - Non-DTC Based Diagnostics >> Diagnosis And Testing >> Poor Or No GPS Reception >> Diagnostic Test

Diagnostic Test

  1. ANTENNA INSPECTION 
    1. Using Service Information locate and verify the antenna is on the vehicle.
    2. Visually inspect the Antenna for damage.

      Is the antenna missing or damaged?

      Yes 

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

      No 

      • Go To  2
  2. CHECK THE ANTENNA CONNECTIONS 
    1. Turn the ignition off.
    2. Disconnect the GPS Antenna connector at the Antenna.
    3. Disconnect the GPS Antenna connector at the rear of the Radio.
    4. Inspect both of the GPS Antenna connections and verify the Antenna is torqued to specification.

      Were the antenna connections clean and torqued to specification?

      Yes 

      • Go To  3

      No 

      • Clean the GPS Antenna connection(s) / torque to specification as necessary.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  3. RADIO 
    NOTE:

    Antenna reception testing

    must

    be done outside and away from man made structures or natural features to ensure all signals are not obstructed.

    1. Connect the Radio Diagnostic Tool (special tool #9977-6-13, Adapter, Long RF RG-58 Fakra) and (special tool #9977-6-GPS-GLO, Antenna, GPS GLONASS) to the GPS Antenna connection on the back of the Radio.
    2. Place the test antenna base on the roof of the vehicle.
    3. Turn the ignition on.
    4. Drive the vehicle outside to an un-obstructed area.
    5. Turn the Satellite Radio on and select several different known good stations.

      Is the reception still poor or not available?

      Yes 

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

      No 

      • Go To  4
  4. ANTENNA 
    NOTE:

    Antenna reception testing

    must

    be done outside and away from man made structures or natural features to ensure all signals are not obstructed.

    1. Turn the ignition off.
    2. Reconnect the Radio C7 harness connector.
    3. Disconnect the GPS Antenna harness connector.
    4. Connect the (special tool #9977-6-GPS-GLO, Antenna, GPS GLONASS) (1) to the Radio C7 component connector.
    5. Turn the Radio on.

      Is the reception still poor or not available?

      Yes 

      • Go To  5

      No 

      • Replace the GPS Antenna in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  5. ANTENNA CABLE 
    GC0143945Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Connect the (special tool #9977-6-GPS-GLO, Antenna, GPS GLONASS) (1) to the Radio C7 component connector.
    3. Connect the appropriate (special tool #9977-6-4, Jumper) (1) or (special tool #9977-6-2, Jumper) (1) to the GPS Antenna harness connector (2) at the Antenna.
      GC0143944Courtesy of CHRYSLER GROUP, LLC
    4. Connect the appropriate (special tool #9977-6-1, Adapter) (1) or (special tool #9977-6-3, Adapter) (1) to the Radio C7 harness connector (2).
    5. Measure the resistance across the tool terminals.

      Is the resistance between 47.5 and 52.5 Ohms?

      Yes 

      • The source of the poor reception is not caused by the Radio, Satellite Antenna Cable or Satellite Antenna.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

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