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. With the scan tool, erase all DTCs.
4. Turn the ignition off for a minimum of 10.0 seconds.
5. Turn the ignition on.
6. Using the recorded Environmental Data and the When Monitored Conditions above, operate the vehicle in the conditions that set the DTC.
7. With the scan tool, read 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 EAM.
3. Inspect the Antenna connections.
  Are the Antenna connections clean and secure?
  
  Yes
  - Go To 3
  No
  - Repair the Antenna connection as needed. Refer to ANTENNA, SATELLITE, AUDIO, REMOVAL AND INSTALLATION .
  - 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 EAM.
2. Make sure one of the front doors is still open.
3. With the scan tool, erase the DTCs.
4. Turn the ignition on.
5. With the scan tool, read the EAM DTCs.
  Is the DTC active?
  
  Yes
  - Replace the EAM in accordance with the Service Information. Refer to MODULE, GLOBAL TELEMATICS BOX, REMOVAL AND INSTALLATION .
  - 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 .