Diagnostic Test

READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR DTC TO RETURN
1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
2. With the scan tool, run a vehicle Scan Report, or record the Environmental Data related to the DTCs.
3. NOTE: A front door must remain open whenever checking or erasing Radio DTCs.
4. With the scan tool, record and erase the Radio DTCs.
5. Cycle the ignition switch from on to off, wait five seconds and then back to on.
6. Turn the Radio on and set the volume to 25.
7. Adjust the speakers to the front and center.
8. With the scan tool, read the active Radio DTCs.
NOTE:
A front door must remain open whenever checking or erasing Radio DTCs.

Did the DTC return?

Yes
- Go To 2
No
- Perform the appropriate INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
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
NOTE:
Before performing the diagnostic test, please make sure that 9977-6-CELL-UPD 10K OHM jumper is connected to the 9977-6-CELL test antenna. Do NOT use the 9977-6-CELL-UPD 10K OHM jumper when using the 9977-6- CELL LTE test antenna.
1. Connect the 9977-6-CELL test antenna (special tool #9977-6-CELL, Adapter, Cellular Antenna Diagnostic)IF the special tool is not available connect the 9977-6-CELL LTE (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.
  Does the system come back up and is the 3G symbol illuminated?
  
  Yes
  - Go To 5
  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.
  - Once the repair is complete clear all DTCs.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Antenna in accordance with the Service Information. Refer to ANTENNA, LONG-TERM EVOLUTION 2 (LTE2), REMOVAL .
  - Once the repair is complete clear all DTCs.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
RADIO
1. Visually inspect the terminal on the radio.
2. Ensure the terminal is clean and free of any corrosion or damage.
  - Is the terminal free of corrosion and damage?
  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
  - Repair the terminal as necessary.
  - Perform the BODY VERIFICATION TEST.
    Refer to BODY VERIFICATION TEST .