Diagnostic Test

CHECK THE ANTENNA CONNECTION
1. Turn the ignition off.
2. Disconnect the FM2 Diversity Antenna connector at the back of the Radio.
3. Inspect the FM2 Diversity 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 antenna to the antenna connection on the back of the Radio.
  (special tool #9977-6-FM, Antenna)
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.
  Is the DTC active?
  
  Yes
  - Replace the Radio in accordance with the Service Information.
  - 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 below 47.5 Ohms?
  
  Yes
  - Use the diagnostic kit to locate the short to ground in the 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 .