Diagnostic Test

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 Cellular Antenna in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 2
CHECK THE ANTENNA CONNECTIONS
1. Turn the ignition off.
2. Disconnect the Cellular Antenna connector at the Antenna.
3. Disconnect the Cellular Antenna connector at the rear of the Radio.
4. Inspect both of the Cellular 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 Cellular Antenna connection(s) / torque to specification as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE ANTENNA AND CABLE
1. Connect the 9977-6-CELL-LTE test antenna (special tool #9977-6-CELL-LTE, Adapter, Cellular Antenna Diagnostic) and adapter cable (special tool #9977-6-13, Adapter, Long RF RG-58 Fakra) 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.
  Does the scan tool read: B1560-11-CELLULAR ANTENNA 1 - CIRCUIT SHORT TO GROUND 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 below 47.5 Ohms?
  
  Yes
  - Use the (special tool #9977-6, Kit, Radio Antenna Diagnostic) to locate the short together, 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 .