Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to 2
  No
  - Test complete. The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (G38) UGDO ENABLE CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the UGDO harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (G38) UGDO Enable Control circuit at the UGDO harness connector.
  Is there any voltage present?
  
  Yes
  - Go to 3
  No
  - Replace the Universal Transmitter (UGDO) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE BCM
1. Turn the ignition off.
2. Disconnect the BCM C6 harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (G38) UGDO Enable Control circuit at the UGDO harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (G38) UGDO Enable Control circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .