Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. Activate the Door Lock/Unlock Switch.
3. With the scan tool, read the Body Control Module (BCM) DTCs and record on the repair order.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - 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. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (P777) DOOR LOCK RELAY CONTROL CIRCUIT FOR AN OPEN
NOTE:
This DTC is set when all the door lock motors are inoperative. Check for an open between the BCM and splices.
1. Turn the ignition off.
2. Disconnect the Driver Door Latch harness connector.
3. Disconnect the BCM C6/F harness connector.
4. Measure the resistance of the (P777) Door Lock Relay Control circuit between the BCM C6/F harness connector and the Driver Door Latch harness connector.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the open in the (P777) Door Lock Relay Control circuit.
  - 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 .