There are no specific questions to ask to aid in diagnosis apart from the general questions being asked during an anamnesis. The syndrome is basically living pain or dysfunction on the low back region, especially around the L4-L5 and L5-S1 region. Problems can be expected also on the SI joint and on the hip joint.
It is important to ensure no red flags are present (Page et al. 1967).
Lumbar Spine Assessment 