Diagnostic Test

CHECK THE ANTENNA CONNECTION
1. Turn the ignition off.
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 .
CHECK THE ANTENNA AND CABLE
1. Connect the test antenna to the antenna connection on the back of the Radio.
  (special tool #9977-6-GPS-GLO, Antenna, GPS GLONASS)
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.
  NOTE:
  While using the GPS test antenna the Satellite radio reception will not be available and Satellite radio faults may occur. The GPS test tool will only enable GPS reception to work. For Satellite Radio reception concerns use test antenna 9977-6-SAT
  
  Does the scan tool read: B1562-13-GPS ANTENNA-CIRCUIT OPEN as active?
  
  Yes
  - Replace the Radio in accordance with the Service Information. Refer to RADIO, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 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) or (special tool #9977-6-3, Adapter)
3. Connect the appropriate jumper to the Antenna cable at the Antenna base.
  (special tool #9977-6-4, Jumper) or (special tool #9977-6-2, Jumper)
4. Measure the Resistance across the tool terminals.
  Is the resistance above 52.5 Ohms?
  
  Yes
  - Use the diagnostic kit to locate the open circuit, repair or replace the Antenna cable as necessary.
    (special tool #9977-6, Kit, Radio Antenna Diagnostic)
  - 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 .