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Trunk Lid Key Unlock Switch Circuit

Turn ignition off and disconnect ATS ECU connector. With key not turned, ensure no continuity exists between ECU terminal B1 (Black wire). If continuity is present, repair short in unlock switch circuit. If continuity is not present, turn key, unlock trunk lid and ensure continuity is present. If continuity is not present, repair open in unlock switch circuit. If continuity is present, replace ATS ECU and retest.