Trunk Lid Courtesy Switch Circuits

Turn ignition off and disconnect ATS ECU connector. Open trunk lid and close all other doors and engine hood. Ensure continuity between ground and terminal No. B10 (with power door locks, Red/White wire). Ensure continuity between ground and ECU terminal No. 13 (Red/Green wire) with only one trunk lid open at a time. If continuity is not present, repair open in harness or connectors as necessary. If continuity is present in all courtesy switch circuits as specified, replace ATS ECU and retest.