Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE ANTENNA CONNECTION
1. Turn the ignition off.
2. Disconnect the Radio C7 harness connector.
3. Inspect the GPS Antenna harness connection.
  Is the Antenna connection clean and secure?
  
  Yes
  - Go To Step 2
  No
  - Repair the GPS Antenna connection as needed.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
RADIO
1. Connect the (special tool #9977-6-GPS, Adapter, GPS Antenna Diagnostic) (1) to the Radio C7 component connector.
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 STANDARD PROCEDURE .
  No
  - Go To Step 3
ANTENNA
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, Adapter, GPS Antenna Diagnostic) (1) to the Radio C7 component connector.
5. Turn the Radio on.
  Is the reception still poor or not available?
  
  Yes
  - Go To Step 4
  No
  - Replace the GPS Antenna in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
ANTENNA CABLE

Fig 1: Special Tool Jumper & Antenna Harness Connector
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Connect the (special tool #9977-6-GPS, Adapter, GPS Antenna Diagnostic) (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.
  
  Fig 2: Special Tool, Antenna Harness Connector & DVOM
  Courtesy 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 STANDARD PROCEDURE .
  No
  - Replace the GPS Antenna Cable in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .