Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. With the scan tool, read the RADIO/ETM DTCs.
  Is the DTC active?
  
  Yes
  - Go To Step 2.
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK GPS ANTENNA SIGNAL CIRCUIT AND CONNECTIONS
1. Turn the ignition off.
2. Inspect the GPS cable connection at the Radio.
3. Inspect the GPS cable connection at the GPS Antenna.
  Were any problems found?
  
  Yes
  - Repair the (D8) GPS Antenna Signal circuit/connection as needed.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To Step 3.
CHECK GPS ANTENNA SIGNAL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Connect the appropriate length 9977-6-9 adapter between the Radio and GPS antenna.
2. Turn the ignition on.
3. With the scan tool, erase DTCs.
4. Cycle the ignition switch from on to off, wait five seconds and then back to on.
  Is the DTC active?
  
  Yes
  - Go To Step 4.
  No
  - Repair the (D8) GPS Antenna Signal circuit for an open circuit or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK GPS ANTENNA OPERATION
1. Turn the ignition off.
2. Disconnect the GPS Antenna from the adapter.
3. Connect the test antenna (special tool #9977-6-GPS-GLO, Antenna, GPS GLONASS) to the adapter.
4. Turn the ignition on.
5. With the scan tool, erase DTCs.
6. Cycle the ignition switch from on to off, wait five seconds and then back to on.
  Is the DTC active?
  
  Yes
  - Go To Step 5.
  No
  - Replace the GPS antenna in accordance with Service Information. Refer to ANTENNA, NAVIGATION, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all RADIO/ETM Module 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 RADIO/ETM Module 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 RADIO/ETM Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the RADIO/ETM in accordance with the Service information. Refer to DISPLAY, RADIO, 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.