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 appropriate INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE ANTENNA CONNECTION
1. Make sure that 9977-6-CELL-UPD 10K OHM jumper is connected to the 9977-6 test antenna.
2. Turn the ignition off.
3. Disconnect the Antenna connector at the back of the TBM2.
4. 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 9977-6-CELL2 test antenna to the antenna connection on the back of the TBM2.
  (special tool #9977-6-CELL, Adapter, Cellular Antenna Diagnostic)
2. Using the scan tool, erase the DTCs.
3. Turn the ignition on.
  Is the DTC active?
  
  Yes
  - Go To 5
  No
  - Go To 4
TEST THE ANTENNA CABLE
1. Disconnect the Antenna cable at the base.
2. Connect the appropriate adapter to the Antenna cable at the back of the TBM2.
  (special tool #9977-6-1, Adapter) or (special tool #9977-6-3, Adapter)
3. Connect the appropriate jumper to the Antenna cable at the Antenna base.
  (special tool #9977-6-4, Jumper) or (special tool #9977-6-2, Jumper)
4. Measure the Resistance across the tool terminals.
  Is the resistance above 52.5 Ohms?
  
  Yes
  - Use the kit to locate the open circuit, repair or replace the Antenna cable as necessary.
    (special tool #9977-6, Kit, Radio Antenna Diagnostic)
  - Once the repair is complete clear all DTCs.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Antenna base in accordance with the Service Information.
  - Once the repair is complete clear all DTCs.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
GLOBAL TELEMATICS BOX MODULE (TBM2)
1. Visually inspect the terminals on the TBM2.
2. Ensure the terminal is clean and free of any corrosion or damage.
  - Is the terminal free of corrosion and damage?
  Yes
  - Replace the TBM2 in accordance with the Service information. Refer to MODULE, GLOBAL TELEMATICS BOX, 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 .