Rear Door Courtesy Switch Circuit

Turn ignition off and disconnect ATS ECU connector. Open one rear door and close all other doors and engine hood. Ensure continuity exists between ground and terminal B3 (with power door locks, Red/White wire) or No. 14 (without power door locks, Pink/Black wire). If continuity is present, go to next step. If continuity is not present, repair open in harness or connectors as necessary.