Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
Verify the connection of the Inside Rearview Mirror harness connector.
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 INSIDE REARVIEW MIRROR
1. Turn the ignition off.
2. Disconnect the Inside Rearview Mirror harness connector
3. Connect a jumper wire between the (X802) Emergency Switch LED 2 Supply circuit and the (X805) Emergency Switch Return circuit at the Inside Rearview Mirror harness connector.
4. Turn the ignition on.
5. With the scan tool, read TBM2 DTCs.
  NOTE:
  B1557-11-GREEN EMERGENCY CALL LED CONTROL- CIRCUIT SHORTED TO GROUND should display as active as a result of this test.
  
  Does the scan tool display: B1557-13-GREEN EMERGENCY CALL LED CONTROL-CIRCUIT OPEN as active?
  
  Yes
  - Go To 3
  No
  - Replace the Inside Rearview Mirror in accordance with the Service Information. Refer to MIRROR, REARVIEW, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (X802) EMERGENCY SWITCH LED 2 SUPPLY CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the TBM2 C1 harness connector.
3. Measure the resistance of the (X802) Emergency Switch LED 2 Supply circuit between the TBM2 C1 harness connector and Inside Rearview Mirror harness connectors.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (X802) Emergency Switch LED 2 Supply circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all TBM2 harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all TBM2 harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read TBM2 DTCs.
  Did the DTC return?
  
  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
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.