Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read Global Telematics Box Module (TBM2) DTCs and record on the repair order.
2. With the scan tool, erase DTCs.
3. With the scan tool, read TBM2 DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE ANTENNA CONNECTION
NOTE:
Before performing the diagnostic test, please make sure that 9977-6-CELL2-UPD 30K OHM jumper is connected to the 9977-6 test antenna.

Turn the ignition off.
1. Disconnect the Antenna connector at the back of the TBM2.
2. 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
1. Connect the 9977-6-CELL2 test antenna (special tool #9977-6-CELL, Adapter, Cellular Antenna Diagnostic) to the antenna connection on the back of the TBM2.
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 TBM2 DTCs.
  Is the DTC active?
  
  Yes
  - Replace the TBM2 in accordance with the Service Information. Refer to MODULE, EMERGENCY ASSISTANCE (EAM), REMOVAL AND INSTALLATION or 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 30 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 .