Diagnostic Test

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 

• Go To  4

1. Turn the ignition off.
2. Disconnect the Antenna connector at the back of the Radio C5 harness connector and the EAM C4 harness connector.
3. Disconnect the Antenna connector at the back of the EAM C2 harness connector.
4. Using the wiring diagram, check for any in-line GPS Antenna harness connectors.
5. Inspect the Antenna connections.

   Are the Antenna connections clean and secure?

   Yes 

   • Go To  3

   No 

   • Repair or replace the Antenna connections or cable as needed.
   • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

1. Turn the ignition off.
2. Disconnect the Antenna connector at the back of the Radio C5 harness connector and the EAM C4 harness connector.
3. Connect the test antenna(special tool #9977-6-GPS-GLO, Antenna, GPS GLONASS) to the antenna connection on the back of the Radio.
4. With the scan tool, erase all DTCs.
5. Turn the radio on.
6. With the scan tool, read Radio DTCs.

   Did the DTC return?

   Yes 

   • Go To  4

   No 

   • Repair or replace the Antenna connection as needed.
   • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

1. Connect the test antenna(special tool #9977-6-GPS-GLO, Antenna, GPS GLONASS) to the antenna connection on the back of the EAM.
2. Using the scan tool, erase the DTCs.
3. Turn the ignition on.
4. Turn the Radio on.
5. Using the scan tool, read the EAM DTCs.

   Is the DTC active?

   Yes 

   • Go To  5

   No 

   • Replace the GPS Antenna and cable in accordance with the Service Information. Refer to ANTENNA, SATELLITE, AUDIO, REMOVAL AND INSTALLATION .
   • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

1. Disconnect all EAM 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 EAM 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 EAM DTCs.

    Did the DTC return?

    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 

    • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
    • Test complete.