Diagnostic Test

CHECK FOR ACTIVE DTC
1. Turn the ignition on.
2. Using the scan tool, record and erase the Radio DTCs.
3. Turn the Radio on.
4. With the scan tool, read the active DTCs.
  Does the scan tool display: B156B-19-SATELLITE RADIO ANTENNA - CIRCUIT CURRENT ABOVE THRESHOLD?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the appropriate wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION 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 3
  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(special tool #9977-6-SAT, Antenna) to the antenna connection on the back of the Radio.
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 Satellite test antenna the Satellite radio reception will not be available and Satellite radio faults may occur. The Satellite test tool will only enable Satellite reception to work. For Satellite Radio reception concerns use test antenna 9977-6-SAT
  
  Does the scan tool read: B156B-19-SATELLITE RADIO ANTENNA - CIRCUIT CURRENT ABOVE THRESHOLD 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 4
TEST THE ANTENNA CABLE
1. Disconnect the Antenna cable at the base.
2. Connect the appropriate (special tool #9977-6-1, Adapter) or (special tool #9977-6-3, Adapter) to the Antenna cable at the back of the Radio.
3. Connect the appropriate (special tool #9977-6-4, Jumper) or (special tool #9977-6-2, Jumper) to the Antenna cable at the Antenna base.
4. Measure the Resistance across the tool terminals.
  Is the resistance above 52.5 Ohms?
  
  Yes
  - Use the (special tool #9977-6, Kit, Radio Antenna Diagnostic) to locate the open circuit, repair or replace the Antenna cable as necessary.
  - 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 .